bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effect of Conductive Agent on the Cycle Behavior of Zinc-ion Batteries: Based on In Situ Characterization
Authors: Pan Yete , Bao Cheng
Published: December 2023

This study investigates the effect of Super P as a conductive additive on the electrochemical impedance spectroscopy (EIS) of zinc-ion batteries (ZIBs). EIS measurements were performed on batteries with different Super P contents, and the results reveal that the initial impedance of the batteries does not have a significant difference. However, after cycling the batteries, the impedance behavior changes significantly. The study finds that a high Super P content results in good stability of the battery, whereas a low content results in poor reversibility of the by-products.
In-situ characterization of MnO2-based zinc-ion batteries: understanding the role of by-products in impedance increase
Authors: Bao Cheng , Pan Yete
Published: December 2023

In this study, we investigated the electrochemical behavior of MnO2 cathodes in zinc-ion batteries (ZIBs) using in-situ electrochemical impedance spectroscopy (EIS) analysis during cycling. Our results show that the impedance of the MnO2 cathode increases irreversibly during cycling, which is attributed to the generation of by-products at the cathode surface.
Study on the structure and properties of non-water reacted polyurethane grouting materials
Authors: Li Yi , Zhou Jianwei , Chen Baojun , Yang Wen
Published: December 2023

In this study, non-water reacted polyurethane grouting materials were prepared using three different molecular chain lengths of polyether polyols. The influence of polyols and -NCO/-OH index (Rx) on the initial viscosity, mechanical properties, and concrete adhesion performance was investigated. Additionally, the damping performance of the cured materials was evaluated using dynamic mechanical analysis (DMA). The research results showed that with an increase in the molecular chain length of the polyether polyols, the strength of the cured material significantly decreased, while the elongation at break increased noticeably. Compared to the molecular chain length of the polyether polyols, the effect of the Rx on the mechanical properties of the cured material was not significant, especially in the low molecular weight polyether polyol system with shorter molecular chains (G3). The adhesion strength of the non-water reacted polyurethane grouting materials to concrete was highly correlated with the gelation time, and a slow gelation time could result in the formation of foam-like structures and reduce the adhesion strength. Grouting materials with shorter molecular chain lengths combined with low Rx (G3-1.0) or medium molecular chain lengths combined with moderate Rx (G5-1.4) exhibited excellent mechanical and damping properties.
Effects of using collagen and aloe vera grafted fibroin scaffolds on osteogenic differentiation of rat bone marrow mesenchymal stem cells in SBF-enriched cell culture medium
Authors: Taher Mohamed Salma A , Emin Nuray
Published: December 2023

In the study, collagen and aloe vera were grafted onto silk fibroin with two different methods, and 3D-microporous scaffolds (1F5C4A1 and 2F5C4A1) were formed by lyophilization. Three osteogenic cultures were started by seeding rat bone marrow mesenchymal stem cells (MSCs) and pre-induced MSC (osteoblast (OB)) on biopolymeric scaffolds. The osteogenic medium was enriched with 10% (v/v) simulated body fluid (SBF) to promote mineralization and osteogenic differentiation in one of the MSC cultures and the OB culture. X-ray diffraction (XRD), scanning electron microscopy (SEM), scanning electron microscopy- energy dispersive spectrum (SEM-EDS) analyses on cellular samples and histochemical (alizarin red, safranin-O, alcian blue) and immunohistochemical (anti-collagen-1, anti-osteocalcin, anti-osteopontin) staining showed that bone-like mineralization was occurred by both chemically and cellular activity. In addition, pre-osteogenic induction of MSCs in 2D-cultured was found to promote osteogenesis more rapidly when started 3D-cultured. These results indicated that enrichment of the cell culture medium with SBF is sufficient for in vitro mineralization rather than using high concentrations of SBF. The findings showed that OB cells on the 2F5C4A1 scaffold obtained the best osteogenic activity. Still, other culture media with 10% SBF content could be used for bone tissue engineering under osteogenic induction.
Landslide disaster mitigation and adaptation strategy in one of the East Java horseshoe areas using geographic information system analysis
Authors: Irawan J F , Haeruddin  , Aminah S , Suparno F A D , Lazuardi F A
Published: December 2023

The horseshoe area of East Java is an area that has abundant natural resource potential. In the northern part of the horseshoe region there is a very good biological natural resource with the potential to be used as a food source. Meanwhile, in the southern part is rich with biological and mining potential. This potential causes changes in land use in the northern and southern regions which can trigger landslides in the Horseshoe area. Changes in land use that change the topography and vegetation to become steep and barren will have a very significant impact on landslides. This study aims to map and predict areas affected by erosions using environmental and physical data using Geographic Information System (GIS) Analysis. The results of the mapping are areas that have threats and are vulnerable as well as capacity to erosion. Based on the results of the mapping, it shows that the index of threats greatly influences the hazard of landslides that occur in the area. Based on the result of the mapping, it shows that the disaster mitigation and adaptation strategy is to reduce the threat index or very high vulnerabilities that affect the risk of landslides that occur in an area.
Sanitation facility mapping at Kalideres District, West Jakarta
Authors: Ryansa A W , Sintorini M M , Hadisoebroto R
Published: December 2023

Poor sanitation has various impacts on human health, such as the risk of contracting diseases like diarrhoea, typhoid, polio, and worm infections. The government has set targets in the National Medium-Term Development Plan (RPJMN) 2020 - 2024, with the goal of achieving 90% access to proper sanitation, including 15% of households having access to safe sanitation, and reducing the rate of open defecation to 0% by the end of 2024. The objective of this mapping is to recommend wastewater sanitation technologies in Tegal Alur Subdistrict. Data collection will be carried out through interviews and questionnaires, determining the number of respondents using the Slovin formula. Interviews and questionnaires will be conducted in 4 densely populated neighbourhoods (RW) with a high rate of open defecation, namely RW 01, RW 02, RW 03, and RW 13. Based on the results of interviews and questionnaires, 71% of the population in Tegal Alur Subdistrict have toilets, but only 24% have septic tanks, leading to environmental pollution due to wastewater discharge. The type of septic tank used is individual septic tanks, and 88% of the population in Tegal Alur has never desludged their septic tanks. The condition of wastewater sanitation in Tegal Alur Subdistrict can be described as poor, characterized by a lack of septic tanks to manage wastewater, resulting in wastewater pollution of the environment, which can lead to various diseases.
Evaluation of sanitation hygiene implementation at refill drinking water depot in Lembursitu Sub-District, Sukabumi City
Authors: Afiatun E , Wahyuni S , Supendi N I
Published: December 2023

Refill drinking water is an alternative to fulfill drinking water needs in Lembursitu District, Sukabumi City. People choose to consume refilled drinking water because the price is low and easy to get. There are 17 Refill Drinking Water Depots in Lembursitu Sub-District, Sukabumi City, and study areas at four depots based on various raw water sources and daily water production. The objective of this study was to assess the application of sanitary hygiene at drinking water depots based on the Regulation of the Minister of Health No. 43 of 2014 about Hygiene and sanitary of Drinking Water Depots including the Quality of Water Production. This research is descriptive research. Methods of data collection through field observations, interviews, and analysis of the quality of water production. Based on laboratory results, all physical and chemical parameters meet the quality standard requirements. The bacteriological analysis of the water production revealed that E. coli and Coliform bacteria were present in two of the four samples, with values ranging from 0-1 to 0-3 per 100 ml sample. The requirements for drinking water quality outlined in the Regulation of the Minister of Health No. 492 of 2010 are not met under these circumstances. Depots 1 and 5 have satisfied the requirements after evaluating the implementation of hygiene and sanitation from a variety of perspectives and determining physical feasibility, according to the observation format in the Regulation of the Minister of Health No. 43 of 2014. The scores ranged from 79 to 83.
Local characters of Chinese ethnic settlements in Chinatown area of Malang and Kembang Jepun area of Surabaya
Authors: Wulandari L D , Asikin D , Pratiwi E I
Published: December 2023

Urban development has always brought some impacts to the existing settlements’ dynamic. Heritage settlements acted as a resilient effort in adapting urban developments. Based on the archipelago’s potential wealth in ethnic diversities and cultural communities, the heterogeneity of urban society has always existed. Ethnic settlements (such as Chinese) are often found in developing countries. The unique characteristics of Chinese ethnic settlements set them apart from other ethnic settlements in the same city (such as Arab, Javanese, and others) in terms of their physical environment and community activities. The values of local wisdom in Chinese ethnic settlements in Chinatown Area of Malang were explored and compared to Kembang Jepun area of Surabaya, using typology as an approach in data analysis and processing. Urban design elements such as land use, style, building functions, accessibility, circulation, public space, green space, signage and conservation areas were discussed in this study context of urban heritage. The aim of the study was to be the future guidelines to the government in directing special ethnic settlements’ arrangement (especially Chinese) along with the characters, as well as providing theoretical input for academics to strengthen the local characters with relatively different ethnic settlements in various cities of archipelago. This study showed that Chinese architecture tolerate, adapt and maintain physical aspects through buildings and the living culture.
E-administration for collaborative governance body of green tourism villages in realizing smart villages in Bali
Authors: Halim D K , Pramesti D S , Permatasari D N C
Published: December 2023

Smart Tourism Village used technology to improve the accessibility of public services such as homestays and green tourism attraction packages. In addition, technology is also used to increase agricultural productivity, improve the marketing of agricultural products, and develop tourism village potential. In developing the Green Smart Tourism Village model, the field research was carried out at 30 villages representing 8 regencies and 1 city across Bali. This research aims to answer three problems, first there is no clear system and measurement of Green Tourism Village standardization, second there is no steady coordination between stakeholders, third there is no integrated media and information systems between Green Tourism Village, homestay and tour packages. In this study, a digital platform called SIDeWi*HuB (Sistem Integration of Green Tourism Village) in Bali is developed to facilitate a collaborative governance body of pentahelix stakeholders, namely Bali Government (Tourism Office), private enterprise (PT. RST), Academicians, Community and Tourist. For collaborative governance to be effective and efficient, E-administration is needed utilizing information technology and help stakeholders carry out the duties and responsibilities more easily. Therefore, a policy regulation is needed from the Provincial Government of Bali regarding the establishment of E-Administration for green tourism village on collaborative governance.
Pedestrian path landscape design concepts on Kyai Tapa Street, Grogol, West Jakarta, through urban landscape design approach
Authors: Fauzi R , Simangunsong N I , Fitri R , Danniswari D
Published: December 2023

An urban area offers a wide range of indoor and outdoor activities. The pedestrian area on Kyai Tapa Street, Grogol includes a community-used pedestrian path. It can become an open space in the pedestrian area that serves as a means of enhancing and facilitating activities for the community, particularly pedestrians. The phenomenon on the Kyai Tapa Street, Grogol pedestrian path requires a more explicit concept in the design, so the existing pedestrian path cannot improve the visual quality. It cannot be a comfortable place for pedestrians to pass. Therefore, identifying and evaluating the existing pedestrian path design concepts is necessary. This research study aimed to identify and evaluate the concept of pedestrian paths following the existing conditions using primary and secondary data collection methods through observation, surveys, and literature studies. Factors supporting the comfort of pedestrians are related to the suitability of the path’s shape, the dimensionally design concept, and the elements built around the pedestrian path. The pedestrian path on Kyai Tapa Street, Grogol becomes a link between several places around the pedestrian path area. Therefore, it is necessary to make a clear design concept for pedestrian paths so that the pedestrian path area can improve visual quality and become a comfortable facility for pedestrians.
Cooling capacity assessment in Karet Tengsin Platinum Integrated Area
Authors: Mumtaz L Z , Atianta L , Kustiwan I
Published: December 2023

The increasing trend of urbanisation has resulted in land use changes and increased urban activities, which led to the emergence of the Urban Heat Island (UHI) phenomenon. The readiness of urban design and planning in mitigating UHI becomes crucial, to reduce the demand for cooling energy and enhance productivity. This study aimed to calculate the cooling capacity index of the Karet Tengsin Platinum Area design, using InVEST 3.12.1, based on shading, evapotranspiration, albedo, and distance from cooling islands, and it has a range of 0-1. The index was further analysed, using the kernel density method, to examine the spatial density patterns to identify the priority features that need to be intervened to mitigate UHI in the Area. The research findings show that, the Karet Tengsin Platinum Area design has a cooling capacity index ranging from 0.22 to 0.83, dominated with a low index value, below 0.3, indicating that, this area has poor cooling capacity. Low index values are distributed in built-up areas, which show that, the materials used in built-up areas need to be prioritised as features that need to be intervened to enhance the cooling capacity. Additionally, this study also discusses urban cooling strategies, through other features that are less explored in the modelling. This study method can be used as a reference for urban designers in integrating urban cooling approaches, as UHI mitigation strategies, in urban area planning and design.
Beyond traffic jams: public perceptions of Jabodetabek Commuter Line (KRL) System for sustainable urban development
Authors: Hidayati I
Published: December 2023

Jabodetabek Commuter Line (KRL) is an essential transportation infrastructure that connects the city’s suburbs with the central business district. Despite the system’s expansion in recent years, there needs to be more research on how the public perceives the KRL system as a sustainable transportation option and how these perceptions might influence the system’s effectiveness in achieving sustainable urban development goals. This study aims to understand how Jabodetabek residents perceive the KRL system as a sustainable transportation option. The method of this study is qualitative research with in-depth interviews. The study found that Jabodetabek residents perceive the KRL system as a sustainable transportation option for their daily needs. The participants identified several positive aspects of the KRL system, including its affordability, convenience, and environmental friendliness. However, the study also revealed negative perceptions, such as safety concerns and limited connectivity. Positive perceptions of the KRL system can lead to increased usage and greater support for sustainable transportation policies, whereas negative perceptions can have the opposite effect by reducing usage and decreasing support for sustainability initiatives. These findings indicate the importance of understanding the public’s perception of sustainable transportation options in achieving sustainable urban development goals. These insights inform sustainable transportation policymaking and contribute to global knowledge about sustainable cities and communities.
Study of Trans Siginjai shelter coverage on corridor I and II in Jambi City of Indonesia
Authors: Setiawan M A , Adriana M C , Sitawati A
Published: December 2023

In order to meet mobility needs and prevent congestion, the government introduced and began operating Trans Siginjai Jambi in 2017. The low load factor value, however, indicates that its utilization is currently not optimal in supporting the mobility of people in Jambi City. Bus Rapid Transit (BRT) is a closed transportation system, which bus shelters is become one of the main infrastructures to support its operation. The lack of bus shelters will influence the bus accessibility and the number of passengers. Therefore, the aim of this study is to examine how bus stop services of Trans Siginjai have served community movements in Jambi City’s Corridor I and Corridor II. Comparative descriptive analysis and geographical analysis are utilized in this study to perform coverage analysis. The findings of this investigation demonstrate that up to 8 stops in Corridor I and up to 10 stops in Corridor II fail to adhere to the distance requirements. Trans Siginjai only cover 16.99% of the area and only 21.18% of residential areas along the both corridors. In order to improve the accessibility, more bus stops are required, especially in the dense settlement area.
Long-term analysis on determination of deoxygenation rate of urban river water
Authors: Yustiani Y M , Wahyuni S , Nuraprilia F , Nurkanti M
Published: December 2023

Water quality modeling is one approach in developing river management strategies. The deoxygenation rate is an important coefficient in the water quality of rivers modeling. This study aims to obtain a coefficient of deoxygenation rate using long-term method that can represent the condition of urban rivers with high levels of pollution. The study location was the Cikapundung River, which runs through Bandung, Indonesia. The method used to determine the rate of deoxygenation is long term, with an analysis period of 30 days in the laboratory. The Slope Method and empirical equations from Hydroscience were used to process the data. The results showed that the deoxygenation rate ranged from 0.230 to 0.291 per day. The value of the deoxygenation rate ranges from 0.40 to 0.81 per day using the Hydroscience empirical equation. The overall biochemical oxygen demand Ultimate (La) ranged from 62.03 to 77.18 mg/L. The deoxygenation rate value obtained using the long-term method shows a relatively higher result than the value obtained using the short-term time range. The long-term method is better than the short-term method because the results obtained from the long-term method are closer to the results of the empirical equation.
Water usage pattern of peri-urban community in the river basin: analyzing crucial variables for human exposure model
Authors: Utami R R , Yoga G P , Geerling G W , Salami I R S , Notodarmojo S , Ragas A M J
Published: December 2023

The human exposure model (HEM) is an important tool to predict the amount of contaminants carried by water to the community. Proper input variables play a crucial role in running the HEM, which is often scarce, particularly in low- and middle-income countries like Indonesia. To overcome that problem, we conducted a water demand survey of 10 water-related activities in a peri-urban community of the Upper Citarum River Basin. The survey resulted in three main variables of the exposure model from those activities, i.e. frequency, volume, and duration. This study aims to analyze if the contaminant uptakes from the HEM output were significantly different between groups (i.e.: male and female groups, 18 – 65 y.o. and ≥ 65 y.o. groups) and which exposure routes and water-related activities contribute the most to the contaminant’s total uptake by using statistical and proportional analysis. The output of carbofuran deterministic modelling showed the average total uptake was 1.06.E+00 ng/kg/day. The statistical analysis revealed a significant difference between oral and dermal uptake, but there was no significant difference in total uptake between gender and age groups. After conducting the proportional analysis, it was found that oral uptake contributed almost 99% to the total uptake of carbofuran. The analysis also showed that drinking and cooking were two activities contributing the most to the total uptake. This study’s results are necessary for health risk assessment and HEM development, especially in the field of river basin management.
Social imaginaries methods and socio-engineering competences in sustainable river management (a case study in the living lab Upper Citarum)
Authors: Roosmini D , Witteveen L , Mayangsari I D , Nastiti A , Botden T
Published: December 2023

The Living Lab approach has become popular and developed in the past decade. It could provide a configuration to pursue a shared vision of integrated water resources management of the Citarum River in West Java - Indonesia. The multi-stakeholder situation and the growing recognition of interdependencies among stakeholders foster the complexity of addressing sustainable river management for the Upper Citarum River. To gain insights on essential competencies and adaptations in higher education curricula, the Environmental Engineering Department of the Faculty of Civil and Environmental Engineering-ITB, Telkom University Indonesia, and Van Hall Larenstein University of Applied Sciences, Netherlands, joined hands in a collaborative research project. This study aims to develop a socio-engineering aspect for sustainable river water quality management in the Environmental Engineering Field and Curricula. The methods used are social imaginaries of Participatory Mapping and a Poetry Route that allowed the involved river bank communities to activate their role and take positions in the living lab. Institutional stakeholders, acting in a facilitating role, learned to gain and share information from and with the community. The result concludes that social imaginaries methods enable a new perspective in developing community-based programs and advocate further exploring the socio-engineering competencies of environmental professionals.
A preliminary study on the formation of acid mine drainage through rock geochemical test in the coal mining areas
Authors: Tuheteru E J , Suhaila  , Suliestyah  , Hartami P N , Yulianti R
Published: December 2023

Acid mine drainage (AMD) is the biggest issue occurring in every mining industry. Therefore, it is necessary to check the rock, particularly its potency to form acid mine drainage. PT X in Lahat, South Sumatra does not yet own a distribution model for the PAF and NAF rocks. Thus, this research was conducted to determine the distribution of PAF and NAF rocks as an initial potency for the formation of acid mine drainage. Six samples in the field were taken from the pit walls, in which these sample codes were A, B, C, D, E, and F, respectively. These samples were subjected to the static and kinetic tests in the laboratory. The static test showed that a sample with a potency to form acid was sample E, while the other five samples did not have any potency to form acid. Afterwards, kinetic tests were conducted with a daily cycle for 25 days. The result showed that the sample F had lower pH value, compared with the other five samples. Thus, based on this study, it can be concluded that the only sample having the potency to form acid was sample F, while the other samples, namely A, B, C, D, and E, respectively, did not have any potency to form acids.
The simple filtration unit in reducing parameters of restaurant wastewater
Authors: Yahya H , Rahman A , Izarna S R , Aida N
Published: December 2023

Restaurant wastes have high organic content that often pollute the environment. The filtration process is one method that can be done to reduce the restaurant wastes. The simple filtration process has been proven to be effective and capable of reducing contaminant contained in waste water. This study aims to determine the effectiveness of the simple filtration unit using some media for filtration and reducing some parameters of restaurant waste water. The Filtration experiment was carried out using variations in media with the thickness of 5, 10, and 15 cm. By using of media thickness with 15 cm given the best result in decreasing BOD, COD and turbidity (BOD was 93.4%, COD was 83.86%, and turbidity was 90.4%). The media thickness of 5 and 10 cm had given the best result of TSS parameter which was 99.22%. The media thickness of 5 cm also given the best result in oil and fat parameter, the result showed was 94.02%. The results of this study can be a solution in the treatment of restaurant liquid waste with the help of a filtration system.
Effectiveness of communal wastewater treatment plant in peri-urban Yogyakarta, Indonesia, for Escherichia coli removal
Authors: Lathifah A N , Emeraldine A C , Fatika S A , Yulianto A , Isnikarita R
Published: December 2023

Yogyakarta Special Region, one of Indonesia’s provinces, has many communal wastewater treatment plants (CWWTPs). However, less than 40% of the province’s CWWTPs are operationally viable. Based on data from the Environmental Agency of Sleman Regency, the physical and chemical parameters of approximately 163 CWWTPs were evaluated. Their biological characteristics, however, still need to be understood. This study aimed to investigate the efficacy of CWWTPs in terms of biological parameters, specifically total Coliform and Escherichia coli (E. coli) concentrations in the observed CWWTPs. Five CWWTPs were used as study sites, namely IPAL Manunggal Pringgodani Sejati, IPAL Bakti Warga, IPAL Tambakrejo Bersih, IPAL Nologaten Bersih, and IPAL Andum Roso, which were classified as extremely high and high sanitation risk areas. The total Coliform and E. coli concentrations were determined using MPN techniques based on APHA 9221 (2017). The study found that the E. coli removal effectiveness of the CWWTPs in the very-high sanitation risk areas, namely IPAL Manunggal Pringgodani Sejati, IPAL Bakti Warga, and IPAL Tambakrejo Bersih, was 49%, 18%, and 83%, respectively. Furthermore, in high sanitation risk regions, such as IPAL Nologaten Bersih and IPAL Andum Roso, the CWWTPS were 17% and 73%, respectively. Total Coliform concentrations at all CWWTPs were below the standard limit set by Permen LHK No 68 and the EPA. The findings of this study will help to improve understanding of the WWTP process for E. coli elimination, which will, in turn, help to improve CWWTP performance.
Piezoelectric sensor design of graphite-aluminium with dynamic surface interaction method as an environmental technology
Authors: Utomo S B , Irawan J F , Hilmi G A , Cahyadi W , Suprianto T
Published: December 2023

Today, graphite is a phenomenal material as an environmentally friendly technology in alternative piezoelectric. Graphite materials with electrical conductivity as electrodes have been widely applied in lithium batteries to support electricity with zero-emissions. Many previous studies used graphene electrodes to harvest electrical energy from raindrops colliding on the electrodes. The voltage generated by the impulse of raindrops on the electrodes is about 129 microvolts. Limitations may arise from rain power generation; namely, the space for system installation is proportional to the amount of power generated. Therefore, electrical power is able to generate using immersing the electrodes into seawater. This type of power generation overcomes the space problem as they can be stacked vertically producing a piezoelectric effect. This study aims to design a piezoelectric sensor of graphite and aluminium reacted to seawater after being subjected to pressure. The experimental results show that the increase in graphite composition greatly affects the voltage results and the composition of seawater will decrease the voltage. Voltage arranged in series from the piezoelectric sensor contributes an increase in voltage about twice the voltage of the unit voltage.
Comparative analysis of performance and fouling characteristics of microfiltration and ultrafiltration polycarbonate membrane
Authors: Abror M R , Laksono S , Adityosulindro S
Published: December 2023

Seawater Reverse Osmosis is the most popular desalination technology for providing clean water. However, several problems in SWRO operations occurs, namely the decrease in membrane performance due to fouling. Fouling on the membrane is generally caused by high salinity and organic content in seawater. Therefore, pre-treatment technology is needed to improve water quality and reduce the workload of SWRO. This study aims to determine the suitable pre-treatment technology, by examining the removal efficiency of parameters in water using Ultrafiltration and microfiltration membranes. In this study, feed water was obtained from treated seawater. The experiment employed an average pore size of 0.01 micron polycarbonate track etched (PCTE) ultrafiltration membrane and 0.2 micron polycarbonate (PC) microfiltration membrane, respectively, with a dead-end filtration method and constant flux values at 60 L/m2.h and 120 L/m2.h. The choice of polycarbonate membrane is based on several advantages, such as high durability and chemical resistance. Water quality parameters such as turbidity, total dissolved solid (TDS), conductivity, dissolved oxygen (DO), organic substances (UV-Vis), and chemical oxygen demand (COD) were observed to determine the performance of each membrane types. The results showed that the operation of ultrafiltration membranes able to remove high amount of turbidity and COD with 88 ± 4 % and 86 ± 12 % removal percentage. Moreover, lesser removal efficiency was found for DO, TDS, UV-Vis and conductivity employing ultrafiltration membrane. In comparison to microfiltration, Ultrafiltration membrane was revealed as promising pretreatment for SWRO with higher retention of measured parameters and better membrane filtration performance.
Novel adsorbent derived from sludge of paper industry for removal of cesium ion in water
Authors: Siswoyo E , Tanaka S
Published: December 2023

Metal ion contamination has been a public concern due to its negative impact on human health and the environment. Cesium (Cs), a harmful metal ion, can cause cell damage; acute radiation syndrome includes nausea, vomiting, diarrhea, bleeding, and, in extreme cases, death. As a result, removing cesium ion from water is critical. This research aims to examine the capacity of a novel adsorbent derived from paper industry solid waste to remove cesium ion from water. The adsorption process was carried out with some variables including adsorbent dose, solution of pH, contact time, initial Cs concentration, and adsorbent form. According to characterization data, paper industry sludge contains elements such as SiO2 (28.1%), CaO (21.8%), Al2O3 (16.1%), and Fe2O3 (12%), among others. The surface area of the adsorbent is 100 m2/g and a diameter of 3.8 nm. Following equilibrium, the current study discovered that the developed adsorbent has the highest cesium removal, up to 79% for 10 mg/L of Cs initial. The novel adsorbent has high adsorption removal and may be a promising adsorbent material for metal ion removal in water.
SWOT analysis to determine waste management strategy in Tenggilis Mejoyo District, Surabaya City
Authors: Rachmawati F , Wilujeng S A
Published: December 2023

Tenggilis Mejoyo District, Surabaya City has had a population growth rate of 0,03% in the last ten years, so the amount of waste generation has also increased. Waste management in the district still applies the collect-and-dispose method which results in a large amount of waste that goes to the landfill. This study aims to examine the potential for household waste reduction that occurs in each waste source and determine strategies for improving household waste management. Waste generation data collection method with direct sampling method at the source according to SNI 19-3964-1994 as wee as interviews. The number of samples is 100 houses selected using a stratified random sampling approach which refers to the strata of population density. Interview data were analyzed using Strength Weakness Opportunity Threat (SWOT) analysis to determine waste management strategies to increase waste reduction at the source. The results of this study indicate that the average household waste generation is 15.62 tons/day. Currently, household waste reduction reaches 19.3% from each waste source, namely waste banks, temporary disposal sites (TPS), Reduce Reuse Recycle waste disposal site (TPS 3R), and composting. Increasing reduction through waste utilization and increasing community participation is ideally planned to reach 28.5%. The results of the SWOT analysis show that household waste management is in the third quadrant, namely the turn-around strategy. The strategies that can be implemented consist of conducting socialization and training for the community, providing waste pick-up mechanisms by waste banks, scheduling a waste collection, and implementing technical guidance and periodic monitoring by Environmental Agency and collaborating with corporations.
Technical and financial feasibility study of utilization municipal solid waste as Refuse-Derived Fuel (RDF) in Griyo Mulyo landfill
Authors: Ugroseno W , Warmadewanthi I D A A
Published: December 2023

Griyo Mulyo landfill, the only final waste processing facility owned by Sidoarjo Regency, received a waste generation of 201,975 tons/year in 2022. Most of the municipal solid waste received by the Griyo Mulyo landfill was straightly dumped at the old landfill at 82.2% of total solid waste. Therefore, this research examined the potential for solid waste reduction at Griyo Mulyo final processing site with the Refuse-Derived Fuel (RDF) plant. In addition, an analysis of the financial feasibility of the RDF process and the environmental impact resulting from this process was also carried out. In this study, an analysis of the generation, composition, and density of solid waste received by Griyo Mulyo Landfill was carried out. From these data, the calculation of the mass balance of waste processing is carried out. The financial condition of RDF processing needs to be analyzed for financial feasibility, whether this activity is economically feasible. Some financial data required to calculate feasibility are sales of RDF products, RDF investment costs, and operational and maintenance costs. The result shows an average reduction in RDF raw material was 7.72% annually. The financial analysis on waste recovery to the RDF conversion system on Griyo Mulyo final processing site is feasible to be applied.
Compact or Fragmented? The Development of Spatial Pattern in Southern Peri Urban Area of Surakarta City Using Spatial Metric Analysis
Authors: Istanabi Tendra , Mauludya Yanwa E. J. , Miladan Nur
Published: December 2023

Surakarta City is experiencing rapid development of urban agglomeration that extends beyond the city’s administrative boundaries. The spatial development in Surakarta City tends to the south, which strengthens this area as peri-urban Surakarta. The peri-urban area has a massive and sporadic land development phenomenon. This research aims to see the development of spatial patterns in the southern peri-urban area of Surakarta using spatial metric analysis and qualitative descriptive analysis. Metric spatial analysis is used to quantify the characteristics of spatial pattern development. At the same time, descriptive analysis is used to see the spatial direction of spatial pattern development. The results of the analysis show the tendency of agricultural areacharacteristics in all areas to be increasingly fragmented due to the penetration of built-up area. Meanwhile, the character of built-up area tends to be more cohesive and compact, with random and linear growth patterns following the main road.
Growth Centre Interaction through Gravity Model Approach using Geographic Information System
Authors: Aditantri Rahmatyas , Rahmi Lela A. , Kusumodewi Ashha N. , Wibisono Alif D.
Published: December 2023

Inter-regional interaction in relation to the development of growth centres will be useful in seeing the development of a region in the future. This is because the development of a region is inseparable from the existence of growth centres that function as the starting point of regional development. The development of growth centres and their interactions can stimulate land use development, supporting infrastructure development, and future regional development. This research discusses and examines the process of the formation of growth centres in Maja Urban Area (MUA), Indonesia which is the study area and the regional interactions that occur there. This research is analysing the interaction between growth centre in MUA. This objective is achieved by analysing the urban service first. This research uses the scalogram method in determining the centre of urban growth and uses a gravity model approach assisted by ArcGIS application in assessing inter-regional interactions that occur. The results show that the largest regional interaction occurs between the growth centre of Maja and Curug Badak, which in this case falls into order 1 and 2.
Capacity Assessment Spatialization to Disaster Risk Reduction in Semarang Coastal Area
Authors: Utomo Lieonardo N.
Published: December 2023

Global warming be the one of threats to human civilization that has to be main considerations in environmental management. In addition, global warming is one of key driven factor of tidal flooding that affect many aspects in coastal area society. This study proposes to model capacity preparedness index of Semarang Metropolitan Coastal Area. The analysis divided by two substances, physical capacity and economy capacity. The examination and modelling of capacity preparedness level consider public health facilities availability, road network accessibility, and economy activity. The research uses quantitative methods and maximized the utilization of secondary data to capacity assessment. The findings show that capacity preparedness index of urban area is higher than its peri-urban. In total, Semarang Metropolitan Coastal Area have low-capacity preparedness level. There are only two sub-district which has high level capacity, Semarang Tengah and Semarang Utara. Otherwhile, there are three medium level capacity sub-districts and four low level capacity sub-districts. Those findings show that geospatial analysis can help people and government on how to understanding their capacity in dealing with disaster which cannot be predicted precisely.
Urban-Rural Transformation and Urban Growth Scenario Using Cellular Automata in Lebak District - Banten Province
Authors: Sophianingrum Mada , Islami Muhammad R. , Murti Raditya H.
Published: December 2023

The development of Lebak District has been significant during the previous ten years, with the impact of urbanization, changing the community’s physical, social, and economic shape. The construction of the Serang-Panimbang toll road, which facilitates access to the Metropolitan City of DKI Jakarta, has rapidly transformed Lebak District, which indicates an urban-rural transformation. This study aims to see how rural-urban transformation occurs in Lebak District and to create a scenario of urban development in Lebak District in 2030. Assessment of the level and pattern of transformation based on physical, social, and economic aspects using geographic information system (GIS) applications is conducted. This research uses cellular automata to create urban development scenarios in Lebak District in 2030. The results of this study indicate that the urban-rural transformation in Lebak District occurred due to the influence of urbanization and the construction of a toll road that connects Lebak District with the metropolitan city of Jakarta. Lebak District has four development areas. First is the urban agglomeration of Rangkasbitung, the hub of administration and economy. Second, coastal development areas are located in the southern region of Lebak District. The third strategic development area is the toll road integration area, with a development plan for an integrated industrial region. The fourth location has modest development and is located in terrain with limited accessibility. The results of urban development scenarios using cellular automata show that the development of the Serang-Panimbang toll road led to an increase in urban growth by 21% in 2030.
Spatial Entropy Model for the Impact Assessment of Built Environment on Urban Street Design
Authors: Rakhmatulloh Anita R. , Dewi Diah I. K. , Syahri Endah K.
Published: December 2023

The increase in population has a linear indication of the intensity of people’s movements in urban areas. The emergence of various new phenomena such as economic activity and tourism changes the physical conditions of the urban environment. In this era, spatially sustainable infrastructure adapts to changes in the shape of urban spaces as well as to patterns of population movement. The problem of the lack of willingness to use public transportation and willingness to walk occurs along the Trans Jogja route. Coupled with the high number of private vehicles from both local people and tourists, this has created a traffic jam problem that has not been resolved. The provision of sustainable infrastructure such as Trans Jogja needs to consider environmental conditions and user needs. This study aims to produce an Urban Street Design based on the conditions of the Built Environment components (Transportation System, Land-use, Urban Design). Data collection has been carried out in 2022 for 35 samples of bus stops on Trans Jogja routes. The analytical method used is Arcgis Query (GIS Method) such as buffer and scoring/scaling to determine the Transportation System (road network, sidewalks, etc). The land-use component will use the density and diversity calculation formula (balancing index formula) by utilizing data on the number of residents and the number of buildings per 300-meter radius from the bus stops. The result is an Urban Street Design model that is by the results of the Built Environment analysis with the need for the theory of Sustainable Infrastructure.
Fiscal regulation policy and financial incentives impact on the environmental management
Authors: Davydenko Nadiia , Titenko Zoya , Koval Viktor , Buriak Alina
Published: December 2023

Effective environmental management is a key element of a country’s sustainable social and economic development. This requires comprehensive environmental protection measures and stimulating the use of environmentally friendly technologies and innovations aimed at preserving the environment. One of the ways to achieve these goals is to apply environmental taxes. Environmental taxes are powerful tools for achieving environmental goals and ensuring sustainable development. The article analyzes the implementation and practice of applying environmental taxation. It is revealed that Ukraine had significantly higher greenhouse gas emissions per unit of energy produced in 2012–2021. It was established that emissions of pollutants from mobile sources make up 40% of the total emissions of pollutants into the atmosphere. Pollutant emissions from road transport make up 91% of pollutants emitted by mobile sources. The study examines the possibilities of stimulating emission reductions through an environmental tax in Ukraine and offers to improve the system of financing environmental measures, including through environmental taxation. International practice shows that countries that successfully implement environmental taxes and green taxation instruments are able to achieve more effective results in reducing pollution and rationalizing the use of resources. The right combination of environmental taxes with other instruments, such as regulatory standards and financial incentives, can significantly improve the environmental situation and ensure sustainable economic growth.
Improvement of pricing on the market of organic products
Authors: Stepasyuk L , Cherednichenko O , Sukhostavets A , Volkova N
Published: December 2023

Modern organic agriculture is increasingly gaining momentum against the background of worsening economic, social and environmental problems. In recent years, interest in environmentally friendly production has been growing in many areas. In particular, agriculture in this direction satisfies the needs of mankind for quality products and has a positive effect on restoring the natural fertility of the soil, which contributes to the maintenance of the natural balance. The purpose of this study is to analyze the pricing process on the market of organic products and the justification of recommendations for improving the pricing methodology and determining the equivalent price for organic agricultural products. The work uses: dialectical method, methods of systematic and comparative analysis, economic-statistical and graphic methods, methods of computer information processing. It has been established that the leaders of organic agriculture are countries that have formed systemically influential supranational institutions and societies. When comparing the economic efficiency of production, it was determined that an agricultural enterprise with the production of organic products receives less gross production, net income and profit per 1 ha of farmland than conventional ones. The price analysis of the organic market in Ukraine revealed the need to modify generally accepted approach to pricing. The proposed equivalent price can be a guideline for improving the price policy in organic production.
Modeling the transformation of the EU’s energy sector and its impact on carbon emissions in the context of an energy collapse
Authors: Mints O Y
Published: December 2023

The European Union relies heavily on energy imports from foreign countries, especially for oil and natural gas. This reliance on energy imports exposes the EU to the risks of price fluctuations and interruptions in supply. The likelihood of a complete halt in natural gas deliveries significantly rises following the onset of a hybrid economic war between the Russian Federation and the EU. The use of “dirty fossil fuels” is one of the options for immediate compensation for the natural gas deficit. Therefore, due to the increase in carbon emissions, an energy collapse can have a direct impact on the climate. The goal of the proposed research is to develop a model for the transformation of the EU’s energy sector and its impact on carbon emissions in the context of catastrophic changes in the structure of energy imports. During the research, a simulation model of the development of a three-sector energy market was established. The driver of changes in the model is the minimization of CO2 emissions. The modeling has shown that under normal conditions, the role of renewable energy sources gradually increases. Modeling the conditions of “gas blackmail” has revealed that the emerged deficit in the system will be primarily compensated by the use of dirty fossil fuels.