bluuebunny/crossref_metadata_2025 huggingface dataset:
Peningkatan Komitmen Profesional Guru Melalui Pengembangan Efikasi Diri dan Kepercayaan
Authors: Djuanda Isep
Published: November 2022

Secara umum tujuan penelitian ini untuk menganalisis bagaimana komitmen profesional guru pada Madrasah Tsanawiyah Negeri Jakarta Selatan dapat ditingkatkan, melalui pengembangan efikasi diri dan kepercayaan. Secara khusus, penelitian ini bertujuan untuk mengetahui secara empiris mengenai: 1) Hubungan antara efikasi diri dengan komitmen profesional guru. 2) Hubungan antara kepercayaan dengan komitmen profesional guru dan 3) Hubungan antara efikasi diri dan kepercayaan dengan komitmen profesional guru.Jenis penelitian yang digunakan adalah penelitian kuantitatif, dengan langkah-langkah menentukan populasi dan sampel sebagai tempat untuk menguji hipotesis, mengembangkan dan menguji instrumen untuk pengumpulan data, analisis data, dan selanjutnya membuat laporan yang diakhiri dengan kesimpulan dan saran.Populasi dalam penelitian ini adalah guru Madrasah Tsanawiyah Negeri (MTsN) Jakarta Selatan sebanyak 315 orang guru. Metode pengambilan sampel yang digunakan adalah proporsional random sampling. Penentuan jumlah sampel ditentukan dengan menggunakan rumus Slovin pada margin kesalahan 5%. Dari 315 populasi pada penelitian ini, sampel yang diambil sejumlah 177 orang. Analisis data yang digunakan adalah analisis korelasi yang dilanjutkan dengan penghitungan koefisien determinasi. Hasil penelitian menunjukan: 1) Terdapat hubungan positif yang signifikan antara efikasi diri dengan komitmen profesional guru, yang ditunjukan dengan nilai koefisien korelasi ry1 = 0,707 dan koefisien determinasi dengan nilai ry12 = 0,499; 2) Terdapat hubungan positif yang signifikan antara kepercayaan dan komitmen profesional guru, yang ditunjukan dengan nilai koefisien korelasi ry2 = 0,627 dan koefisien determinasi dengan nilai ry22 = 0,393; dan 3) Terdapat hubungan positif yang signifikan antara efikasi diri dan kepercayaan dengan komitmen profesional guru, yang ditunjukan dengan nilai koefisien korelasi ry12 = 0.740., dan koefisien determinasi dengan nilai ry122 = 0,548.
The Service Program of “You May Not Stop From School” as a Way of the Fulfillment of Educational Rights For Street Children and Dropouts in Palembang
Authors: Zulinto Ahmad , Kristiawan Muhammad , Sasongko Rambat Nur
Published: November 2022

Based on statistical data from the Ministry of Education and Culture in 2018, the dropout rate in South Sumatra Province was very high. Especially for the Palembang City area, there were about 17% of the cases of children dropping out of school in South Sumatra until 2018. The large number of children who have dropped out of school and who were not in school cause exploited children to be still often found on the streets, joining their parents to earn a living and even vulnerable to being involved in various juvenile delinquency and other criminal acts. Based on this fact, the Palembang City Government (Pemkot) in 2019, through the Palembang City Education Office, then developed a program to eradicate school dropouts and street children called the "The Service Program Of You May Not Stop From School" (Poltabes). This program is followed up with education at a distance school (Filial) for street children and school dropouts in Palembang Learning Activity Center. The method used was qualitative research. The research was conducted at a filial school for street children and dropouts in Palembang city. Data collection in the study was carried out through observation, interviews, and documentation. The subjects of this study consisted of one tutor each, a companion teacher, a party from the Education Office, and students. The study found that the fulfillment of the right to education for street children and dropouts through the Filial school program at Palembang Learning Activity Center has been going well. Until the end of the 2020/2021 academic year, the implementation of this filial school program has had an impact, including: 1) 7 elementary school students, 42 junior high school students, and 44 high school students, with a total of 93 students have completed formal education; 2) street children or dropouts who attend filial school education show a change in behavior and actions in a positive direction, both in attitude and appearance; 3) a decrease in the dropout rate in the city of Palembang, which was initially 1,278 cases reduced to 491 cases; 4) support the increase in the average length of schooling which was initially 10.37% to 10.52%; 5) support the increase in the human development index from 77.89% to 78.44%; 6) This Poltabes innovation is in line with and contributes to the achievement of The Sustainable Development Goals (SDGs) in the education sector.
Pengaruh Kompetensi Manajerial Kepala Sekolah Dan Model Supervisi Klinis Terhadap Kreativitas Mengajar Guru
Authors: Sastradiharja EE Junaedi , Tanrere Syamsul Bahri , Dzulfah Fahriatu
Published: November 2022

Penelitian ini bertujuan untuk mengetahui pengaruh kompetensi manajerial kepala sekolah dan model supervisi klinis terhadap kreativitas mengajar guru, baik secara parsial maupun secara simultan. Penelitian ini menggunakan metode survei dengan alat pengumpul data menggunakan angket. Sementara analisis data menggunakan analisis deskriptif untuk melihat sebaran sampel, dan tingkat perkembangan variabel penelitian, uji prasyarat analisis statistik, dan uji t (parsial) dan uji F (simultan) dalam analisis regresi linear berganda untuk membuktikan hipotesis yang diajukan. Sampel pada penelitian ini adalah guru TKIT, SDIT dan SMPIT Riyadh El Jannah Islamic School Bekasi sebanyak 67 orang guru. Hasil penelitian ini menunjukkan bahwa terdapat pengaruh positif dan signifkan kompetensi manajerial kepala sekolah dan model supervisi klinis terhadap kreativitas mengajar guru di Sekolah Riyadh El Jannah Islamic School baik secara sendiri-sendiri maupun secara simultan.
The Impact of COVID-19 on Small-Scale Sporting Events in South Africa
Authors:   University of Johannesburg, School of Tourism and Hospitality, College of Business and Economics, Bunting Road Campus, Cottesloe, 2092, Johannesburg, South Africa, MCHUNU Ayanda J. , NYIKANA Siyabulela ,   University of Johannesburg, School of Tourism and Hospitality, College of Business and Economics, Bunting Road Campus, Cottesloe, 2092, Johannesburg, South Africa, TICHAAWA Tembi M. ,   University of Johannesburg, School of Tourism and Hospitality, College of Business and Economics, Bunting Road Campus, Cottesloe, 2092, Johannesburg, South Africa
Published: November 2022

This article evaluates the impact that COVID-19 has had on small-scale sporting events within the context of South Africa. To this end, it considers the impacts that the pandemic has had on these types of events, and reflects on the strategic direction in the management and organisation of these events going forward. To achieve this, a content analysis of existing frameworks and documentary analysis of government policies and strategies, coupled with interviews with stakeholders involved in the organisation and management of small-scale sporting events domain was conducted. Through a purposive sampling technique, as well as snowballing, key stakeholders in the small-scale sporting event domain were interviewed using a semi-structured interview schedule. The key findings revealed that small-scale sport events experienced great financial loss due to the global pandemic which resulted in some of these events having to cease their operations during the hard lockdown levels. However, the lessons learnt during these times have offered event organisers ideas and guidelines for dealing with future external shocks. A key observation is made for increased governmental support for small-scale sporting events in this regard. This research forms a basis for improved understanding of sport tourism, and specifically small-scale events especially in changing times.
THE IMPACT OF COVID-19 ON THE TOURISM SECTOR IN BOSNIA AND HERZEGOVINA
Authors:   University for Business and Technology, Faculty of Economics, Pristina, Kosovo, IMERI Amir , GIL-ALANA Luis A. ,   University of Navarra, Faculty of Economics, Pamplona, Spain; Universidad Francisco de Vitoria, Facultad de Ciencias Juridicas y Empresariales, Madrid, Spain
Published: November 2022

In this study, we examine the degree of persistence in tourism in Bosnia and Herzegovina and the impact that the COVID-19 pandemic has had on it. The series investigated are foreign arrivals and overnight stays for the time period from January 2008 to December 2021. The methodology used is based on fractional integration. The results indicate that the impact of COVID-19 has been strong on the series, removing the significance of the time trend, increasing the level of persistence and reducing significantly the seasonality factor in both arrivals and overnight stay series.
Новый высокопродуктивный сорт ячменя Омский 102 для внедрения в производство
Authors: Николаев Петр Н. , Юсова Оксана Александровна
Published: November 2022

Сорта ярового ячменя российской селекции характеризуются широким ареалом возделывания не только по Западно-Сибирскому, но также по Восточно-Сибирскому и Уральскому регионам. Представлена характеристика продуктивности перспективного сорта ярового ячменя Омский 102, переданного на Государственное сортоиспытание в 2021 г., по сравнению с сортами Омский 95 (стандарт) и Омский 101. Исследования проводили с 2018 по 2020 г. в южной лесостепи Западной Сибири. Новый перспективный сорт ярового ячменя Омский 102 характеризуется содержанием белка в зерне (12,1 %) на уровне стандарта Омский 95 (12,6 %) и Омский 101 (12,3 %). Наблюдается достоверная прибавка у сорта Омский 102 по содержанию крахмала в зерна (+1,0 % к стандарту) и по массе 1000 зерен (+9,3 г к стандарту и +2,2 г к сорту Омский 101). За счет повышенной урожайности (+1,18 т/га к стандарту и +0,20 т/га к сорту Омский 101) сорт Омский 102 имел повышенный сбор питательных веществ с единицы площади: белка — 656,0 кг/га (+98,9 кг/га к стандарту); сырого жира — 98,1 кг/га (+7,1 кг/га к стандарту); крахмала — 3,0 т/га (+0,6 т/га к стандарту и +0,4 т/га к сорту Омский 101).
Продуктивность сортов сои в зависимости от норм высева и способов посева
Authors: Тедеева Виктория Витальевна , Абаев Алан Анзорович , Тавказахов Сослан Аланович
Published: November 2022

Увеличение урожайности, валовых сборов и улучшения качества зерна сои в значительной степени зависит от применяемой агротехники. Изучено влияние норм высева и способов посева на рост, развитие и особенности продукционного процесса перспективных сортов сои в РСО-Алания. Исследования проводили в период 2019 – 2021 гг. в предгорной зоне, характеризуемой как лесостепь с неустойчивым увлажнением. Установлены оптимальные нормы высева и способы посева, которые могут обеспечить оптимальный рост, развитие и высокую производительность растений. Объектом исследования являлись следующие сорта сои: Лира — очень ранний, Ирбис — ранний, Иней — среднеранний, Вилана — среднеспелый. Полевая всхожесть семян уменьшалась с увеличением нормы высева — от 83,6 до 87,9 %. Самая высокая сохранность растений к уборке установлена при норме высева 500 тыс./га (94,2 %), а самая низкая (82,1 %) — при 800 тыс./га. Наивысшая семенная продуктивность растений сои установлена при норме высева 500 тыс./га — 4,5 г. Скороспелые сорта лучше реагировали на широкорядные посевы (45 см). Хорошие результаты показал и сплошной способ посева. В среднем за 3 года урожайность широкорядного посева была на 0,18 т/га выше рядового. Содержание белка изменялось в зависимости от способа посева незначительно, большее его количество отмечено на широкорядных посевах.
Улучшение плодородных свойств почв за счет рационального сочетания вносимых удобрений и способов известкования при возделывании озимой тритикале в Центральном районе Нечерноземной зоны
Authors: Попов Евгений Валерьевич , Кирдин Владимир Филиппович , Штырхунов Виктор Дмитриевич , Конончук Вадим Витальевич , Каланчина Алла Сергеевна
Published: November 2022

Рассмотрен ряд вопросов по улучшению плодородных свойств почв за счет рационального сочетания вносимых удобрений и предлагаемых способов известкования при возделывании озимой тритикале в районах Центральной Нечерноземной зоны России. Кратко раскрыты основные факторы, неблагоприятно влияющие на плодородные свойства почв и урожайность при возделывании зерновых, в том числе озимой тритикале. Приведено описание особенностей озимой тритикале как гибрида, получившего ряд положительных качеств пшеницы и ржи, в том числе заложенные селекционерами потенциальные возможности сортов озимой тритикале. Более подробно приведены результаты научных исследований и рекомендации, направленные на способы реализации заложенных селекционерами потенциальных возможностей сортов озимой тритикале за счет комплексного подхода к применению эффективных способов обработки почвы, а также рационального сочетания вносимых удобрений и известкования почв с учетом особенностей и проблемных условий аграрных районов Центрального Нечерноземья.
Оценка влияния некоторых факторов на воспроизводство телок голштинской породы
Authors: Фирсов Григорий Михайлович , Акимова Светлана Александровна , Морозова Зоя Черменовна , Фирсова Юлия Григорьевна
Published: November 2022

Оценены воспроизводительные показатели (индекс осеменения, интервал осеменения, сервис-период, промежуточный период, стельность после 1-го осеменения) у выделенной группы дойных коров голштинской породы. Репродуктивные показатели впоследствии оценивали в зависимости от генотипа, уровня продуктивности, очередности лактации, возраста 1-го отела и используемых методов синхронизации. У коров голштинской породы интервал осеменения был на 7 дней больше, чем у других. При оценке влияния суточной продуктивности обнаружены недостоверные различия между группами (p > 0,05) по сервис-периоду и по индексу осеменения, а по интервалу и стельности после 1-го осеменения — достоверные (p < 0,05). Глобальный нуль p-значения гипотезы был близок к значению 0,05 и при последующем множественном сравнении не продемонстрировано достоверных различий между сравниваемыми группами. С помощью расчетов, основанных на продлении сервис-периода, установлены теоретические потери для удлиненного цикла дойных коров, которые составили 17840 руб. на молочную корову и учитывали потери молока и нерожденных телят, а не затраты на дальнейшее осеменение и лечение бесплодных коров.
Influences of subjective norms on teachers’ intention to use social media in working
Authors: Tran Huong Thi Thu , Nguyen Nga Thuy , Tang Thuy Thi
Published: November 2022

This study investigates factors affecting teachers’ intention to use the Zalo app–a social media with impressive users in Vietnam in recent years. The extended technology acceptance model (TAM) involves subjective norms (SNs) (colleagues, managers, students, and parents) and anxiety as the precursors of user attitude and intention to use as well as perceived ease of use (PEOU) and perceived usefulness (PU) as the key variables in TAM was employed. 1,105 teachers in Vietnam took part in the online survey. The study employed the partial least squares structural equation modeling (PLS-SEM) to analyze the quantitative data and the relationship among factors. The findings show that colleagues have no impact on PU, and managers have an insignificant influence on PEOU. In contrast, students and their parents positively influence teachers’ PEOU and usefulness. Moreover, managers can increase teachers’ anxiety levels, whereas students’ connection decreases anxiety. These variables accounted for 79.6% of the variance in users’ adoption. The results confirm the impact of SNs on teachers’ intention to use the Zalo app in working. This is the study on issues in Vietnam related to social media used at institutional level–a no way back solution in the new educational context of the modern society.
Red Mud as a Secondary Source of Scarce Metals - Recovery using Red Microalgae
Authors: Vítová Milada , Náhlík Vít , Čížková Mária , Singh Anjali , Bišová Kateřina , Mezricky Dana , Rucki Marian
Published: November 2022

Red mud is a by-product of the production of alumina from bauxite ore. Less than 2% of the red mud produced is currently being reused. The red mud contains a number of residual elements, some at a considerable concentration. The red microalga Galdieria sulphuraria was used to test the accumulation of scarce metals from red mud. Algal cells were cultured autotrophically and mixotrophically in a liquid medium with an alternative addition of glycerol as a source of carbon. Red mud was added into the growth medium as the acidic extract (in 10% HNO3). The growth of the cultures was monitored. The content of single scarce metals in the red mud extract and the biomass, was determined using ICP-MS. The most abundant element in red mud was Fe followed by Na and Al (53%, 17% and 12% respectively). The most abundant lanthanides were Ce, Y and La. The growth of cultures grown in the presence of red mud was comparable with the control. The red alga Galdieria sulphuraria can grow in the presence of red mud and accumulate scarce metals from it. The accumulation is more effective under the mixotrophic regime, shoing Y as the most accumulated lanthanide.
A qualitative assessment of Environmental Impact Studies in Greece
Authors: Vagiona Dimitra , Mimikos Loukas
Published: November 2022

Environmental Impact Assessment (EIA) is a proactive methodical process that investigates and predicts the potential direct, indirect and cumulative impacts of a proposed project/activity on various environmental components, ideally from project/activity initiation to decommissioning. The output of the above process is the Environmental Impact Study (EIS) that should be of high quality and include all the relevant information.
The aim of this study is to evaluate the quality of EIS of projects/activities in Greece. The sample consists of 75 complete EIS, conducted after the issue of Law 4014/2011 and includes projects/activities of both categories A1 (extremely significant impacts) and A2 (significant impacts) and of various groups of projects (e.g. hydraulic projects, environmental infrastructure systems, renewable energy sources, industrial and related facilities). The methodology includes a structured evaluation of the above EIS, using the quality evaluation criteria checklist (8 categories and 92 evaluation criteria) of the Environmental Impact Statement Review Package developed by the Impact Assessment Unit (IAU) of Oxford Brookes University. The findings showed that the majority of EISs perform above the average grade of 2.5, when compared against the evaluation criteria. However, the studies omit important environmental and social issues, such as public consultation and alternatives.
Optimal Productive Structure for Sustainable Development: Environmental Extended Input-Ouput Analysis
Authors: Markaki Maria , Papadakis Stelios
Published: November 2022

The research aims to apply an integrated methodology for optimizing the productive structure of an economy with a view to sustainable development for the Greek economy. The main purpose of the research project is to constitute at the theoretical and applied level a model of synthesis of all economic, environmental, and social designs to optimize the results they create. The analytical approach at the sectoral level and the implementation of input-output analysis ensure effective planning to achieve an adequate level of development and effective response to modern environmental challenges. The objective of the restricted optimization model is to maximize the economy’s growth rate (economic pillar) under air emissions restrictions (environment pillar). The impact of the optimal structure on the workers’ skills and the demand for different occupations (pillar society) will be used to assess the results. The optimization model will be resolved using Evolutionary Optimization Algorithms, which are suitable for multimodal, non-curved, intensely nonlinear, with also nonlinear rather than convex limitations problems.
Port Environmental Management Insights 2020
Authors: Darbra RM , Wooldridge Chris , Puig Martí , Selén Valter
Published: November 2022

This paper presents the results of research conducted in collaboration with 97 ESPO EcoPorts members that completed the Self-Diagnosis Method (SDM), most of them members of the EU TEN-T network. SDM is a concise checklist against which ports can self-assess their environmental management performance, and it is also a precursor to the International Quality Standard of Environmental Management System, EcoPorts PERS (http://www.ecoports.com) – the only standard dedicated to the port sector. Participating ports can compare their results with the benchmark performance of the EU port sector as a whole. The system is anonymous. SDM is managed by the European Sea Ports Organisation (ESPO).
A set of 60 environmental management performance indicators were selected from those present in the SDM (around 300). These key environmental indicators were categorized as follows: i) Environmental Management - summarized in an Environmental Management Index; ii) Environmental Monitoring; iii) Top 10 Environmental Priorities, and iv) Services to Shipping offered by the port authority in order to facilitate greener shipping. Responses were analyzed and the results are discussed in this paper. 2020 results were compared with data from previous years, allowing the analysis of trends over time. Despite Covid-19, results over the years show trends of continuous improvement in port environmental management performance in terms of the provisions necessary to deliver compliance and sustainability of port operations.
The inter-organizational green careers – literature review and a conceptual framework
Authors: Sulich Adam , Piwowar-Sulej Katarzyna
Published: November 2022

The analysis of publications indexed in Scopus and Web of Science databases revealed that there is a lack of research on designing an internal green career in companies. Therefore, the paper aims to present the searching results and characterize the possibilities of the development of internal green careers taking into account the knowledge about green jobs and HRM. The paper is based on the literature studies and is conceptual. The adopted methods are inductive and deductive inference methods. This paper presents a review of the new green HRM concepts.
Litter decomposition across a post-fire chronosequence in Mediterranean pine forests.
Authors: Fyllas Nikolaos , Sazeides Christodoulos , Christopoulou Anastasia
Published: November 2022

Litter decomposition is a key component of the global carbon cycle, and a process of great importance for the function of forest ecosystems. The rate of litter decomposition shows significant variation both between different forest types and within forests of different successional stage. Considering that global change is expected to shift (directly) the abiotic conditions experienced by trees in a stand as well as (indirectly) the structure of stands, a sound understanding of how litter decomposition varies within forests of the same dominant species and environmental conditions but of different structure is important. To explore this question, we applied the litterbag method within the permanent forest plot monitoring network established on the island of Lesvos. We selected four Pinus brutia dominated plots under similar environmental conditions, across a fire chronosequence ranging from 15 to 90 years. Twenty-four litterbags were buried in each plot and sequentially removed after specific time periods. The percentage of the initial remaining mass was used as a response variable and modeled with a negative exponential and an asymptotic curve. Our findings show that the rate of litter decomposition increases with time since fire and standing biomass of the plot, highlighting the importance of maintaining mature forests in Mediterranean ecoregions.
Urban water bodies and recreational opportunities in Finland
Authors: Alikhani Somayeh , Nummi Petri , Ojala Anne
Published: November 2022

Urban water bodies provide recreational opportunities to residents such as swimming, boating, fishing and spending leisure time. The recreational opportunities offered by water bodies contributes to both physical and mental health. In Finland, there are almost unlimited possibilities to enjoy water bodies in urban areas by having 3.4 million hectares of inland water resources, e.g., lakes, ponds, and coastal wetland and 5.2 million hectares of marine waters. In this paper, we highlight the recreational values offered by these water areas in the urban context. We use water-based outdoor recreation statistics collected from the three provinces in Finland called Uusimaa, Pirkanmaa, and Pohjanmaa. As a result, we show that the demographic structure, access to the water areas are linked to the type of recreation activities such as swimming, fishing and boating. Thus, resulting in the well-being of people living in cities.
Preparation of carbon nanotubes from plastic solid wastes over magnetic nickel ferrite catalysts
Authors: Diaz de Tuesta Jose , Silva Adrián , Faria Joaquim , Lopes Jessica , Roman Fernanda , Santos Silva Adriano , Lenzi Giane , Gomes Helder
Published: November 2022

This work presents the development of magnetic carbon nanotubes (MCNTs) from plastic solid waste (PSW). For this purpose, diverse catalytic nanoparticles based on Fe, Ni and Al were prepared by impregnation of alumina or co-precipitation of Ni, Fe and Al nitrate salts with NH4OH, followed by calcination at 800 ºC. These magnetic nanoparticles were then used as catalysts in the growth of carbon nanotubes by chemical vapour deposition in a tubular furnace using low-density polyethylene as carbon precursor and as representative polymer composing PSW. MCNTs were characterized by transmission electron microscopy (TEM) and X-ray diffraction. The morphology and dimensions of the MCNTs were observed by TEM, concluding that large multiwalled MCNTs were prepared with magnetic nanoparticles inside (spacing of ~0.2 nm) and with a carbon interlayer spacing of ~0.34 nm. In conclusion, the synthesis of MCNTs from polyolefins is evidenced and can lead to technological alternatives in the treatment of PSWs.
Removal of gaseous ammonia released from odorous composting leachate employing carbonaceous adsorbents prepared from agro-industrial wastes
Authors: Diaz de Tuesta Jose , PERDIGÃO-LIMA Thalles , Feliciano Manuel , Pereira Wilken Adriana , Gomes Helder , Shinibekova Assem , Kalmakhanova Marzhan , Massalimova Bakytgul
Published: November 2022

Biological and composting processes used in the treatment of municipal solid waste typically are sources of odour pollution (gaseous pollutants include SO2, NH3, H2S and other toxic air pollutants). In this work, the removal of NH3 present in odorous composting leachate was assessed for the first time in a fixed-bed column loaded with carbonaceous adsorbents prepared by hydrothermal carbonization (HTC) assisted with sulphuric acid and by pyrolysis of carbon precursors (olive stone and malt bagasse). The resultant adsorbents were characterized to study their surface chemistry and textural properties. Scarce work studying the HTC in presence of additives, but H2SO4-assisted HTC allow to obtain acid hydrochars with accuracy properties for NH3 adsorption. In this work, the hydrochar prepared from olive stone by H2SO4-assisted HTC shows the highest NH3 adsorption capacity (11.4 mg g-1), evidencing that acidity contributes more significantly to the removal of NH3 than the specific surface area of the adsorbents. The NH3-saturated hydrochar was regenerated by washing with distilled water and subsequently re-used in the adsorption of NH3, obtaining satisfactory performance (68% of the mean NH3 adsorption capacity of its respective first use).
Column experiments to investigate the fate of per- and polyfluoroalkyl substances (PFASs) in the subsurface during soil stabilization with colloidal activated carbon
Authors: Niarchos Georgios , B. Kleja Dan , Ahrens Lutz , Fagerlund Fritjof
Published: November 2022

Remediation of sites contaminated with per- and polyfluoroalkyl substances (PFASs) is key to reduce the contamination of drinking water sources and subsequent human exposure. PFAS production and use is increasingly being restricted worldwide, however, legacy contamination plumes in soil and groundwater system are still posing a threat due to their persistence against degradation. One of the most widely studied soil remediation techniques for PFASs is stabilisation, which results in the long-term entrapment of the contaminants with the addition of fixation agents in the subsurface, aiming to prevent their leaching from soil to groundwater. In relation to this, the aim of this study was to identify the leaching behaviour of PFASs in a treatment scenario using activated carbon. Results have shown significantly increased sorption of PFASs in soil amended with activated carbons compared to untreated soil. Additionally, there was a positive correlation between the length of the perfluorocarbon chain and sorption efficiency. The study is a step towards increasing our understanding on the efficiency and longevity of stabilisation with activated carbons as a remediation strategy for PFAS-contaminated soils and groundwater.
Transferring the Carbonation of Biomass Bottom Ash from Batch to Continuous Operation
Authors: Schnabel Kevin , Brück Felix , Pohl Sven , Weigand Harald
Published: November 2022

Biomass incineration residues may be used for CO2 capture and storage by carbonation of waste-borne metal hydroxides. Moist carbonation of these ashes can be performed under mild conditions (ambient pressure and temperature) and accelerated by using a CO2-rich gas. The process requires the wetting of the typically dry-discharged ashes and highly depends on the moisture content. Handling of the moist ashes in continuously operated reactors is challenging, especially due to build-up of incrustations. In this study, the carbonation of biomass bottom ash was performed in fixed-bed and rotating drum reactors. Wetting was performed either manually prior to fixed-bed carbonation or with spray-nozzles. The moisture dependent CO2 uptake was evaluated by a gas balance. Results show that the CO2 uptake in the fixed-bed and rotating drum was consistently between 20 and 35 g/kg, although the CO2 concentration in the rotating drum was significantly lower (10 vol% vs. 100 vol%). In the fixed bed, the uptake strongly depended on the moisture content, while in the rotating drum the effect was less pronounced. Application of such rotating drums allows for a continuous solids feed while combining wetting and carbonation.
Carbon nanotubes synthesized from LDPE for application in wet peroxide oxidation of paracetamol
Authors: Roman Fernanda , Marim Lopes Jessica , Diaz de Tuesta José , Lenzi Giane , Tavares da Silva Adrián , Faria Joaquim , Gomes Helder
Published: November 2022

Carbon nanotubes (CNTs) were produced by chemical vapor deposition (CVD) considering low-density polyethylene (LDPE) as a carbon source and as an alternative to upcycle plastic solid waste. The CNTs were synthesized over bimetallic catalysts (Ni and Fe) supported on Al2O3 and purified with H2SO4 to dissolve the metal particles from the material. Both original (CNT-O) and purified materials (CNT-P) were tested as catalysts in catalytic wet peroxide oxidation (CWPO) of paracetamol (PCM). Both catalysts promoted the complete conversion of PCM within 8 h of reaction and were able to mineralize 60% of the organic content of the effluent (measured as TOC) in 24 h. Catalyst CNT-O was able to completely decompose hydrogen peroxide (H2O2) within 24 h, whereas CNT-P was only able to decompose ~80%. Therefore, the efficiency of H2O2 consumption, measured as XTOC/XH2O2, was higher for catalyst CNT-P (0.75) than for CNT-O (0.61). Metal leaching, especially Ni, was observed during the CWPO run with CNT-O, while it is avoided when using CNT-P. Thus, purified CNTs have proved to be active in CWPO of PCM, allowing a more controlled decomposition of H2O2 and avoiding leaching of metal species.
Integrating Seaport Infrastructure Monitoring Approaches to Improve Smartness and Climate Adaptive Capacity
Authors: Tsaimou C. , Chalastani V. , Sartampakos P. , Tsoukala V.
Published: November 2022

Seaport infrastructure monitoring promotes the development of an effective management system that ensures functionality, structural capacity and safety. Monitoring approaches are considered to be a useful tool in an attempt to deal with growing global trends, such as seaport “smartness”, or with challenging issues such as climate crisis, while enhancing the financial performance and the capability of a seaport to remain competitive in the trading environment. Therefore, the present paper proposes a framework for integrating monitoring processes and relevant data analyses to improve seaport smartness and adaptive capacity to climate change. The framework is applied at the seaport of Lavrio, located in central-eastern Greece, where in-situ inspection and condition assessment is performed through utilizing modern monitoring techniques. The research outlines the significance of establishing a robust monitoring system such as the one hereto described to minimize the impact of natural hazards, perform suitable maintenance strategies and optimize the required periodic control of seaport facilities.
Magnetic CoFe2O4@carbon yolk-shell nanoparticles as catalysts for the catalytic wet peroxide of paracetamol
Authors: Gomes Helder , Silva Adriano , Costa Guari Nathália , Diaz de Tuesta Jose , Eno Pottker Walmir , Yassue Cordeiro Patricia
Published: November 2022

This work focuses the use of carbon-coated magnetic cobalt ferrite nanoparticles as catalysts for catalytic wet peroxide oxidation (CWPO) of the emerging pollutant paracetamol. A magnetic core composed of CoFe2O4 is developed by a sol-gel method. The core is subsequently coated with a formaldehyde-resorcinol resin and TEOS, further carbonized at 600 ºC, and etched with NaOH to create a yolk-shell structure denoted as CoFe2O4@void@C. XRD, TEM, and FTIR analysis revealed that the uncoated core is composed by a CoFe2O4 cubic spinel structure with a crystallite size of 53 nm calculated using the W-H method, matching very well the average size observed by TEM (53.51  4.2 nm). Comparing the performances of CoFe2O4@void@C and of the bare CoFe2O4 in the CWPO of paracetamol, TOC removals of 46 and 58% are obtained respectively after 24 h of reaction. An empirical kinetic model based on second-order and autocatalytic expressions was developed to suitably describe the decomposition of H2O2 and the removal of paracetamol using CoFe2O4@void@C as catalyst.
Study of the potential of Rhodococcus strains for degradation of the pesticide Glyphosate (Roundup)
Authors: Alexieva Zlatka , Gerginova Maria , Peneva Nadejda
Published: November 2022

The experiments were aimed at studying the tolerance of the studied strains of Rhodococcus sp. M1 and Rhodococcus sp. D1 to the presence of Glyphosate (N- (phosphonomethyl) glycine) in the culture medium. A rich organic medium (YEPD), a mineral medium (VD) with 1% glucose and a mineral medium without a carbon source were used for cultivation. Each of the media was supplemented with Glyphosate, up to 0.3 g/l. The obtained data showed that the tested strains grew well and were tolerant to the presence of Glyphosate in the media used.
The purpose of the following experiments was to determine the ability of both strains to degrade glyphosate. By GC-MS analyses, it was found that a strain of Rhodococcus sp. M1 utilized glyphosate as the only carbon source, degrading 36% of it within 120 hours. The other strain, over the same time period, degraded 40% of the pesticide tested.
Glyphosate is one of the most widely used organophosphate herbicides in modern agriculture. The presented studies on the potential of new strains of Rhodococcus for its biodegradation contribute to the complementarity of the known techniques for bioremediation of polluted environment.
Reducing sewage sludge ash variability in the context of P-recovery by optimizing the storage management using Monte-Carlo simulations
Authors: Weigand Harald , Vogt Svenja , Brück Felix , Schnabel Kevin
Published: November 2022

Phosphorus (P) is a critical raw material and the EU largely depends on P-imports to cover its demand. This is increasing efforts to recover P from secondary P-sources such as municipal sewage sludge ashes (SSA) from mono-incineration. Usage of SSA for mineral fertilizer production requires compliance with certain quality standards regarding P-concentrations and trace element levels. This is particularly challenging in view of the variability in composition and amount of sewage sludge due to different technologies applied by the wastewater treatment plants (WWTP) and various catchment areas when sludge is jointly incinerated. By applying different sewage sludge treatment processes along the process chain, homogenization of the output quality of mono-incineration plants may be achieved. To investigate the effects of input variability and treatment processes on SSA composition a Monte-Carlo simulation approach was used. The simulations included probability distributions of sewage sludge composition data from 57 WWTP. Missing data were compensated by mean substitution to generate a complete set of input distributions. The resulting distributions of SSA nutrient and contaminant concentrations obtained by the simulation were compared.
A stochastic approach to resilience assessment of urban water systems from source to tap.
Authors: Nikolopoulos Dionysios , Kossieris Panagiotis , Makropoulos Christos
Published: November 2022

The design of urban water systems faces long-term uncertainties in a multitude of parameters, from the hydroclimatic and socioeconomic realms, such as population growth, climate change and shifting demand patterns. To analyze such systems in a holistic way, many models for sub-systems are typically involved, while the performance of different designs is generally measured against a variety of metrics and in different times scales for each sub-system. In this work, we present a framework for stress-testing urban water systems based on the novel metric of a system’s resilience, i.e., the degree to which a water system continues to perform under progressively increasing disturbance. The framework covers the entire water cycle, by coupling a water resources management model to a hydraulic water distribution model thus covering the water system from source to tap. The framework is underpinned by a stochastic simulation module supporting the representation and capturing of uncertainty throughout the water cycle. To assess the system’s resilience under uncertainty, we “stress-test” it with an ensemble of scenarios whose parameters are stochastically changing within a design horizon. The approach is showcased through a synthesized case study.
Aloe Vera waste for Methylene Blue (MB), Rhodamine B (RB) and Methyl Orange (MO) adsorption.
Authors: Mazzeo Leone , Bavasso Irene , Di Palma Luca
Published: November 2022

Aloe Vera (Aloe barbadensis miller) waste obtained from a local cosmetic production factory was used as bio-adsorbent for the removal of three different dyes: Methylene Blue (MB), Rhodamine B (RB) and Methyl Orange (MO). The material was preliminary washed with water at room temperature. Batch tests at 25°C were performed and the experimental data were fitted using the pseudo-second order kinetic model. It was found out that the rate of adsorption for the tested dyes follows the order MO>MB>RB. Results show that the Aloe Vera waste can be successfully used to remove cationic dyes in aqueous solution. More precisely, 94% removal of MB, 71% removal of RB and a 13% removal of MO was observed in separate tests in which the starting concentration of the correspondent dye was set to 210 mg/L and the bio-adsorbent dosage to 20g/L.
An overview of pressure-driven membrane technologies for a sustainable recovery of volatile fatty acids (VFAs)
Authors: Naddeo Vincenzo , Pervez Md. Nahid , Mahboubi Amir , Hasan Shadi , Cai Yingjie , Zarra Tiziano , Belgiorno Vincenzo , Taherzadeh Mohammad J.
Published: November 2022

Currently, petroleum-based volatile fatty acids (VFAs) sources are not acceptable towards sustainable development goals (SDG); therefore, biobased-derived VFAs are of interest. Anaerobic digestion has been identified as a useful technology for the production of biobased VFAs from organic waste residue because of their environmental sustainability, easy operation and affordability. The anaerobically digested liquid comprises several inorganic and organic compounds/particles, including VFAs, which is one of the main challenges nowadays since the particles/compounds free VFAs are highly demanded. Hence, pressure-driven membrane filtration technologies (microfiltration, ultrafiltration, nanofiltration and reverse osmosis) is being widely used due to their higher VFAs recovery efficiency. Microfiltration and ultrafiltration usually applied as pretreatment for removing coarser particles, while nanofiltration and reverse osmosis possess a remarkable role in recovery performances. This report is highlighted on the various types of membrane used for VFAs recovery percentages and critically discuss their influence. Afterwards, it was confirmed that lower pore size membranes offer better recovery percentages of VFAs over higher pore size membranes due to their permeability rate.
Sustainable Highways: The challenges of the future
Authors: Kehagia Fotini
Published: November 2022

Road transport and infrastructure are keys to the evolution and prosperity of modern society. Connecting people and places, goods and services in safe, efficient, and sustainable way is essential for creating and maintaining sustainable and inclusive growth across society and the economy. A sustainable highway should satisfy lifecycle functional requirements of societal development and economic growth while reducing negative impacts to the environment and consumption of natural resources. In the future, highway infrastructure will face increasing pressures and impacts from a range of issues including changing weather patterns, population growth, capacity constraints, shortage of land and capital and rapidly changing technologies that outstrip the pace of new infrastructure development. From the other point, advanced technologies and intelligent transport solutions will play a significant impact on the transport solutions in the future. In this paper, the increasing environmental pressures that highway face and the new advanced technologies that might shape the highways infrastructure are presented.
Functionalized iron oxide nanocomposite ultrafiltration membranes for water-in-oil emulsion separation
Authors: Hasan Shadi , Wadi Vijay , Ouda Mariam , Naddeo Vincenzo , Banat Fawzi
Published: November 2022

Removal of emulsified water in oil (w/o) emulsions are the most challenging compared to free water and dissolved water emulsions. Emulsified w/o cannot be removed by conventional techniques such as settling tanks, oil skimmers, floatation and magnetic technologies. Membrane technology is a highly efficient, energy saving, and pollutant free alternative. In this work, iron oxide-oleylamine nanoparticles have been synthesized and embedded into polylactic acid (PLA) to make a hydrophobic-super-oleophilic ultrafiltration membrane. The concentration of the nanoparticles was varied from 0.5 to 3% of the polymer. Scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDS), thermal gravimetric analysis (TGA), and Fourier-transform infrared radiation (FTIR) were utilized to confirm both the attachment of the oleylamine on the iron oxide and the loading of the prepared nanoparticles into the PLA membrane. The water contact angle was found to increase steadily as the concentration of the nanocomposites increased. This was associated with the hydrophobicity of the membranes, allowing the oil to penetrate through the membrane. Moisture removal in surfactant‐stabilized w/o emulsions reached up to 80% in the composite membranes, compared to only 52% in the pristine PLA. The maximum permeability was found to be at 2% loading, where 885 L/m2.h/bar was reported, compared to 500 L/m2.h/bar in the PLA. The abundance of iron-oxide, and the biodegradability of PLA prove the capability of the prepared membranes to be a viable and environmentally friendly alternative for w/o separation.
An Agent-Based Modelling approach to assess risk in Cyber-Physical Systems (CPS).
Authors: Koutiva Ifigeneia , Moraitis George , Makropoulos Christos
Published: November 2022

The classic approach to risk assessment in civil engineering infrastructure (incl. water systems) often takes an incomplete view of the socio-technical system and its cyber-physical extensions, thus confining the ability to properly quantify the level of risk. To tackle this limitation and enhance the water sector’s preparedness, this work proposes the use of Agent-Based Modelling (ABM) to explore and derive alternative routes to quantify risk. ABM approaches carry the capacity to describe systems of complex adaptive nature that characterize behavioural rules (e.g., selection of target), socio-technical systems (e.g., water systems including human stakeholders), and their “real-world” interaction. This work takes advantage of those capabilities, to quantify risks through a generic, case independent approach where the cyber-physical attackers are treated as independent, autonomous agents (e.g. hackers, saboteurs) that follow various behavioural rules to decide on their targets and plan their attacks, and hence interact with an external environment simulating the critical nodes of water critical infrastructure (e.g. storage tanks, pumping stations). The ABM simulations can be used to provide the data sets required to derive probabilities for the cyber-physical events that allow the quantification of the risk in accordance with the classic approach to risk in infrastructure planning and natural hazards.
Using monk seal faeces as a non-invasive technique to monitor the incidence of microdebris
Authors: Hernandez-Milian Gema , Tsangaris Catherine , Anestis Anastasios , Bundone Luigi , Panou Aliki
Published: November 2022

required under the EU Marine Strategy Framework Directive to prevent any harm on marine ecosystems and their biota. Sampling to evaluate effects of marine litter, including microdebris, in top predators is difficult. Usually, microdebris is examined in the gastro-intestinal tract of stranded dead animals. However, the population of the endangered Mediterranean monk seal is too small for obtaining sufficient samples. The present study implemented for the first time a non-invasive technique for collecting monk seal samples to assess the microdebris ingestion in a systematic manner. A total of 12 samples of monk seal faeces were collected from marine caves in Zakynthos Island, Greece (INTERREG MED project “Plastic Busters MPAs”). A total of 166 particles were identified; 77% of the particles were smaller than 3 mm but a piece of net larger than 5 cm was also found. The majority of particles were filaments (84%), and only one sphere was found. Faeces contained on average 14 particles per sample, half of the average in previous studies using the whole digestive tract. The use of faeces represents an effective non-invasive tool to assess the incidence of microdebris and the trophic transfer of these pollutants.