bluuebunny/crossref_metadata_2025_split huggingface dataset:
The potential emission of personal care products derived plastic microbeads: a case study of Ho Chi Minh City, Vietnam
Authors: Hoang T T T , Nguyen B A , Pham N N Q , Nguyen N B , Tran T K T , Tu T C L , Huynh T D , Nguyen T N T , Pham T P Q , Nguyen T V , Nguyen T L , Le Q H 
Published: January 2022

Abstract
Plastic microbeads are commonly used in many personal care products and can cause adverse impacts to the environment and ecosystem. The toxicological problem with these pollutants are due to their non-biodegradable materials, which washed down the drain; end up accumulating in the aquatic system causing increased frequency and quantity of items ingested by biota. Several polymers (e.g. Polyethylene) especially those found in plastic microbeads have been reported to be in tandem with other toxic contaminants serving as a vector for their transports in the environment. Thus, the legislative ban for plastic microbeads is used in some developed countries, but many countries including Vietnam do not take any legal action. This present study aimed at potential microbead’s existence in the cosmetic market of Ho Chi Minh City (HCMC). The list and ingredients of microbeads containing personal care products (toothpaste, facial cleanser/scrubs and body wash/scrubs) have been checked. The microbeads containing PCPs are common for all explored categories, especially in toothpaste. Data from the online questionnaire survey have shown that 98% of respondents have frequently used at least one microbead containing product. Four polymers (Polyethylene, Acrylates Copolymer Styrene/Acrylates Copolymer and Acrylates/C10-30 Alkyl Acrylate Crosspolymer) have been observed in the product package of several facial cleansers and body scrubs. Thus, the potential negative impacts of this contaminant should not be ignored.
Marine litter pollution along sandy beaches of Can Gio coast, Ho Chi Minh City, Vietnam
Authors: Bui Thanh-Khiet L. , Pham Quoc-Khanh , Doan Nhu-Thuy , Nguyen Thanh-Ban , Nguyen Van-Nghia , Phuong Nguyen Kieu Lan , Nguyen Hong Hanh , Nguyen Hong Quan 
Published: January 2022

Abstract
Marine debris is a significant threat to the marine environment, human health and the economy in Can Gio island, Vietnam. In this study, we conducted beach litter surveys to quantify and characterize marine litter from six beach transects in this region for the first time using the OSPAR beach litter monitoring guideline. A total of 29,456 items weighting 529,432 g was recorded from 12 surveys in two monitoring campaigns in December 2019 (dry season) and in June 2020 (rainy season). Plastic was the most abundant type of litter in terms of quantity (a total of 26,662 items) and weight (325,606 g), followed by paper and cardboard, cloth, wood, metal, glass and ceramics, rubber and other items. Meanwhile, ropes (less than 1 cm in diameter) and plastic bags accounted for the major parts of sampled plastic items, i.e., 20.18% and 14.46%, respectively. In general, a higher percentage of marine litter, particularly the fishing related items, was found in the rainy season than in the dry season, possibly due to increased fishing and aquaculture activities. In contrast, a reduction pattern of the single use plastics in the rainy season might be due to the decreased tourism activities during the Covid pandemic period. This study not only showed the magnitude of litter pollution, but also provided valuable information that could help decision making to better control and reduce marine litter in the region. In addition, insights from this study indicate that there is an urgent need to design collection, reuse and recycling programs in the area. The collected recyclables, specially plastics, will be a great source of materials for recyclers in a circular economy achieving sustainable development goals.
Strengthen resilience to rivers flooding by the drag reduction technique
Authors: Bouchenafa Walid , Dang-Vu Trong , Dang-Vu Huyen Xuan 
Published: January 2022

Abstract
Urban agglomerations face the risk of overflowing rivers due to intense urbanization in flood-prone areas and the climate change effects. Despite the important protective measures deployed to reduce the fluvial flooding risk, additional efforts are still needed. This work aims to propose a new complementary non-structural protection measure, used to reduce the river flooding risk. The study is part of the NABRAPOL (NEBRASKA POLYMER) project, which aims to improve knowledge of the drag reduction effect by adding polymers in open-channel flows. The addition of polymers, even in limited concentrations, allows high friction to decrease with the typical Manning coefficient reduced up to 45%. An application case on a real watercourse is presented in this article. Two measurement campaigns are carried out on a river along 30 km. Experimental devices are deployed, and non-intrusive hydraulic measuring instruments are installed at the study field. Surface velocities are evaluated by the Large-Scale Particle Image Velocimetry (LSPIV) technique, and water depth is measured using ultrasonic radar sensors over the river. Measurement results show that the addition of 20 ppm of polymers in the flows results in a marked drag reduction by decreasing the water depth to 18% of its initial depth. The drag reduction technique by addition of small concentrations of polymers can be considered as a new and effective method to reinforce the measures already deployed in the flood risk management strategy since it allows the water depth to be decreased thus avoid overflowing rivers in the extreme flooding event.
Modeling impacts of industrial park activity on air quality of surrounding area for identifying isolation distance: A case of Tan Tao Industrial Park, Ho Chi Minh City, Viet Nam
Authors: Ho Bang Quoc , Khue Vu Hoang Ngoc , Nguyen Thoai Tam , Nguyen Thi-Thu Giang , Diep Thi-Quynh Nhu , Vo Phu Le , Pham Thi-Kim Nhung 
Published: January 2022

Abstract
Industrial factories have been addressed as the main contributor to the amount of air pollution in many urban areas around the world. The emissions of air pollutants from factories, combined with exhausted gases from automobile and domestic cooking activities, have placed enormous adverse effects on human health. Recently, air quality models, which usually figure out for industrial emission with representative indicators such as CO, NO2, SO2, and TSP, have triggered an application to identify a suitable isolation distance that could lessen affection on public health. Concerning to develop an air emission inventory for Tan Tao Industrial Park (IP) for three sources of points, line and area sources by using top-down and bottom-up approaches, this study aim to: (i) apply a system model of TAPM – AERMOD model to study the air pollution dispersion from the IP to the surrounding area, and (ii) identify a hygiene isolation distance for sensitive objects around industrial park, especially zones of community, based on their separating demand from contamination. Results show that the point sources are the dominant air emission sources of Tan Tao IP. Total emissions of Tan Tao IP in 2019 estimated at 413.15 tons of TSP/year, 280.9 tons of NO2/year, 621.99 tons of SO2/year, and 2720.21 tons of CO/year. Modeling results show that 1-hour maximum concentration of TSP, NO2, SO2, and CO in the simulation area is 581µg/m3, 4.069µg/m3, 5.478µg/m3, 40.695µg/m3, respectively, exceeding the standards. Especially, the pollution levels of NO2 were 20 times higher than the limit value, similar trends for SO2 (15 times higher). The hygiene isolation distance was suggested a widely ranged from 2910 meters in the North-West and in the rest directions of Ho Chi Minh City. Some sensitive objects such as residential areas, hospitals and kindergartens recently are inside the affected zone should be reckoned to have suitable solutions that keep their health safe. The method for calculation of hygiene isolation distances from industrial activities has a significant guiding not only for environmental safety action but also for public health protection.
Application TAPM-AERMOD system model to study impacts of thermal power plants in SouthEast and SouthWest areas to the air quality of HCMC: current status and according to Vietnam power planning VII toward 2030
Authors: Ngoc Vu Khue Hoang , Thuy Nguyen Hang Thi , Nguyen Tam Thoai , Ho Bang Quoc 
Published: January 2022

Abstract
Vietnam’s urban areas have faced serious environmental pollution issues, including water pollution, municipal waste, and air pollution. Vietnam’s real gross domestic product (GDP) has been experiencing positive growth for the past five years since 2016. And in 2019, Vietnam’s real GDP increased by 7.02% compared to the previous year. To maintain the growth rate, there is a huge amount of electricity required, not accounting for the other sectors. Thermal power plants generate more than 50% of total electricity in Vietnam, therefore, it is said that coal-fired power plants have been the major sources of air emissions and caused a serious impact on the environment. Recently air pollution is a hot issue in Ho Chi Minh City (HCMC), the air quality is being polluted by PM2.5, O3, CO, NO2, and TSP. Despite that, the neighboring areas of the city will install more coal-fired power plants, threatening to degrade the quality of the environment. Therefore, the objectives of this study are (i) Modeling the impacts of thermal power plants in SouthEast and SouthWest areas on the air quality of HCMC for two scenarios (current status in 2019 and future according to Power planning VII (adjusted) toward 2030); And (ii) Develop interprovincial air quality protection solutions. The research applied the TAPM model for meteorological modeling and AERMOD model for air pollution dispersion. The annual average PM2.5 concentration in the study area was approximately 0.121 μg/m3 and the highest concentration at a location close to Vinh Tan thermal power center with 8.61 μg/m3. NO2 the annual average concentration from power plants in 2020 and 2030 blows to HCMC and contributes to HCMC’ air quality only 0.01 and 0.03 μg/m3, respectively. The 24 hours average concentration of SO2 from power plants in 2030 blows to HCMC and contributes to HCMC’ air quality of 10 μg/m3. The 24 hours average SO2 levels of HCMC in 2030 is 39.2 μg/m3, higher than WHO’s guideline (20 μg/m3). Currently, air pollution in HCMC is polluted by PM2.5, SO2, and NO2 and cause bad effect to public health. However, in the future with the contribution of 33 thermal power plants under intercity/provinces air pollution dispersion, air pollution HCMC will be worse and affect public health. Air pollution HCMC will be a huge impact on HCMC’s public health in the future due to the contribution of 33 thermal power plants under intercity/provinces air pollution dispersion. The paper developed 7 main mitigation measures to reduce the impacts of air pollution from the power plan and reduce the impacts of air pollution on HCM’s public health. The measures are focused on using clean fuel, advanced technology, and controlling trans-provincial air pollution.
Au nanoparticles loaded Hydroxyapatite catalyst prepared from waste eggshell: synthesis, characterization and application in VOC removal
Authors: Thien Luu Trung , Quang Tu Le Nguyen , Trung Bien Cong , Long Nguyen Quang 
Published: January 2022

Abstract
Eggshell, which is made almost entirely of calcium carbonate, is among the most abundant waste materials from poultry production. In 2018, the worldwide egg production exceeded 78 million metric tons which contributed to over 8 million metric tons of eggshell waste. However, this waste can be converted into useful materials for several industrial applications. Herein, hydroxyapatite (HAp) of fine particles was prepared using a green synthesis procedure in water medium from eggshell waste. Then, HAp was utilized as support material for loading different contents of Au nanoparticles (0.2 and 0.5 wt%). The materials were characterized by Brunauer-Emmett-Teller (BET) surface area analysis, Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM-EDS), X-ray diffraction (XRD). The prepared catalysts were used for VOCs oxidation of formaldehyde in continuous flow and humid condition. In this study, Au/HAp (0.2 wt%) exhibited superior catalytic activity with good low-temperature reproducibility and high dispersion of particles on the surface of hydroxyapatite. Hence, hydroxyapatite prepared from eggshell waste is considered as a promising support material for noble metal catalysts for VOCs oxidation.
Treatment of C.I Reactive Blue 160 by ozonation system
Authors: Duong Pham-Hung , Huynh Ngoc-Han T. , Yoon Yong-Soo 
Published: January 2022

Abstract
This study was carried out to assess the treatment ability of color, dye, and COD in the dyeing wastewater containing C.I Reactive Blue 160 by ozonation system. Both batch and continuous operating modes with concurrent and counter-current flows were investigated. The effects of the ozone gas flow rate, pH, temperature, Na2CO3 concentration, and initial dye concentration were evaluated. The decolorization, dye removal efficiencies, and mineralization ability of COD by ozonation were determined. The results indicated that ozonation had high efficiency in the treatment of dyeing wastewater containing C.I Reactive Blue 160. The treatment performance was affected by the ozone gas flow rate, pH, temperature, Na2CO3 concentration, and initial dye concentration. The removal efficiency of color, dye, and COD were 98.04%, 99.84%, and 87.31% for the treatment of 200 mg/L initial dye concentration in batch mode with 30 min ozonation time, respectively. In the continuous operation and counter-current flow, the color, dye, and COD removal efficiencies reached 97.24%, 99.76%, and 86.38% after 30 min HRT, respectively, and higher than concurrent flow. The reaction of ozone and C. I Reactive Blue 160 was the first-order reaction in both batch and continuous operation. The complete mineralization required 90 min ozonation time.
Potential of Earthworm (Perionyx Excavatus) in food treatment in Ho Chi Minh City
Authors: Hang Vo Thanh , Hoang Anh Trinh Mai , Khanh Pham Kim 
Published: January 2022

Abstract
In Ho Chi Minh City, Vietnam, there are about 9 thousand tons of domestic waste every day and 73% of them are treated by using landfill sites [2]. With the population growth rate in recent years, the generated waste volume will then increase in the future and is estimated to reach a total of around 13 thousand tons that could cost Ho Chi Minh City about 260 thousand dollars in treating this waste in 2025 [3]. Although this treatment method is not without advantages, the downsides will be far more significant. Moreover, in recent years, the cultivation of Perionyx Excavatus, a species that had been reported to have the ability to treat organic waste in some foreign articles, has become increasingly popular in Vietnam. So, this research was aimed to evaluate the potentiality of Earthworm (Perionyx Excavatus) for food waste management of households in Lab-scale in Ho Chi Minh City, Vietnam. According to this study, the average outdoor humidity and temperature of Ho Chi Minh City are higher than optimal conditions to raise Earthworm. In addition, the percentage of biomass is highest when rising the proportion of food waste and cow dung 4:6, respectively. It’s a point for encourage the applying Earthworm (Perionyx Excavatus) for food waste management in Ho Chi Minh.
Fabrication Of Carbon Aerogels From Coir For Oil Adsorption
Authors: Nguyen Hieu M , Tran Khoi A , Nguyen Tram T N , Do Nga N H , Le Kien A , Le Phung K 
Published: January 2022

Abstract
Coir, known as coconut fibers, are an abundant cellulosic source in Vietnam, which are mostly discarded when copra and coconut water are taken, causing environmental pollution and waste of potential biomass. In this research, carbon aerogels from chemically pretreated coir were successfully synthesized via simple sol-gel process with NaOH-urea solution, economical freeze-drying, and carbonization. The samples, including pretreated coir, coir aerogels, and carbon aerogels, are characterized using FTIR spectroscopy, SEM, XRD spectroscopy, and TGA. The carbon aerogels exhibit low density (0.034–0.047 g/cm3), high porosity (97.63–98.32 %), and comparable motor oil sorption capacity (22.71 g/g). The properties of carbon aerogels are compared with those of coir aerogels, indicating such better values than those of coir aerogels. Coir-derived carbon aerogels is a potential replacement for the hydrophobically-coated cellulose aerogels in term of treating oil spills.
Application of Marine Algae in Water Pollution Control
Authors: Tang Junyu , Liang Qizhao , Li Changling , Huang Xianghu , Xian Xiaoqing , Li Jinhe , Shang Zhuangzhuang , Pang Chunjin , Liu Yu , Zhang Rui 
Published: January 2022

Abstract
Water pollution is mainly caused by chemical pollution, especially inorganic and organic pollutants, including toxic metals and metalloids as well as various synthetic or organic chemicals. Marine algae have good adsorption capacity for heavy metals such as As, Zn, Cu, Cd, Pb et.al in polluted water, and can also have certain removal ability for pollutants such as nitrogen and phosphorus in sewage. This paper reviews the current application status of wastewater treatment and the mechanism and application of marine algae in wastewater treatment, aiming at providing reference for further research and development of marine algae in wastewater treatment.
Ocean Energy Development under the Background of Carbon Emissions Peak and Carbon Neutrality in China
Authors: Ma Changlei , Wang Xiaoyong , Jiang Bo 
Published: January 2022

Abstract
The ocean energy resources are abundant in China. The technical potential in Chinese coastal area is more than 70 GW. Thus, the utilization of ocean energy resources is very important for the energy saving and the mitigation of climate change. The Renewable Energy Law implemented since 2010 and the special fund program for ocean energy established in 2011 has advanced great progress of ocean energy technology research, development and demonstration in recent years in China. The ocean energy technologies in China have achieved rapid development under the support of the Ministry of Finance, the Ministry of Natural Resources, the Ministry of Science and Technology and so on. The accumulated capacity of ocean energy is in the international advanced level, but the ocean energy industry is still in early stage. The carbon emissions peak and carbon neutrality strategy put forward in China requires the transition to green energy and electricity, which also provides crucial opportunity for the development of the utilization of ocean energy resources in China. The paper introduces the status of ocean energy technology and industry in China firstly. Then the problems in the development of ocean energy are analysed. The potential of utilization of ocean energy is estimated to support the carbon emission reduction. Finally, the vision and main tasks are given.
Feasibility Assessment of Renovating Schools in Arid Regions
Authors: Elkhapery Basel , Kianmehr Peiman , Doczy Ryan 
Published: January 2022

Abstract
Nowadays, renovation of buildings including schools is a common practice to enhance their indoor environmental conditions and resource efficiency, and to reduce their operation cost. Construction industry always has its reservation regarding the perceived excessive renovation costs when greening a building. Such perception has been discouraged property owners from greening and certifying their existing buildings according to USGBC’s Leadership in Energy and Environmental Design (LEED) rating systems. This research established an optimization model with ability of distinguishing and sorting LEED feasible credits according to their costs to achieve cost-effective LEED certifications. Nine random existing schools in Dubai were assessed to form a case study. The assessments’ results proved that less than 1% and 5% of total construction cost should be devoted to modify buildings as per LEED guideline and certify them up to Gold certificate or Platinum certificate, respectively. Attaining platinum certificate resulted in 27% and 30% water and energy consumption reductions, respectively. The estimations revealed that the projected capital spending in energy and water conservation might be returned in a maximum period of seven years with lower utility bills.
Research on the Development of Forest Recreation Industry Based on SWOT and AHP Model--Take the Forest Recreation Industry of Xiying Street in Jinan City as an Example
Authors: Lu Jiahao , Li Miaomiao 
Published: January 2022

Abstract
In the context of rapid socio-economic development, forest recreation industry has gradually emerged. This paper uses SWOT and AHP analysis to evaluate the development of forest recreation industry in Xiying Street, Jinan City, and analyzes the strengths and weaknesses of the forest recreation industry. It also provides data support and reference for the development of forest recreation industry in similar areas, so as to promote the development of forest recreation industry in the future.
Study on Flow Characteristics of Produced Fluid in Bohai Oilfield Cycle Steam Stimulated Heavy Oil Reservoir
Authors: Liu Jianbin , Zhong Liguo , Hao Tongchun , Liu Yigang 
Published: January 2022

Abstract
It is helpful to better understand the flow state of produced fluid in different stages by studying the flow characteristics of produced fluid of cycle steam stimulation (CSS in short) heavy oil reservoirs from the reservoir to the wellhead, and to provide more research for the CSS replacement technologies for a clear direction. However, there are few studies on the flow state of produced fluids, and the mechanism understanding is not very clear. This article starts with laboratory experiments to study the factors that affect the fluidity of heavy oil in the Bohai Oilfield. It is found that temperature, water content of W/O emulsion, and shear rate have a greater effect on the viscosity of produced fluid in heavy oil reservoirs in Bohai Oilfield, while pressure and N2 dissolution have less effect on the produced fluid viscosity. Due to the different flow speeds of the produced liquid in different flow stages, the equivalent shear rates are different. Therefore, when studying the flow characteristics in different flow stages, it is necessary to consider the effect of the difference in flow velocity. The effect of pressure and nitrogen dissolution on the viscosity change of produced fluid is very small. And then, based on high-precision historical fitting by using reservoir numerical simulation, the CSS development of Bohai Oilfield was predicted. Finally, combined with the numerical simulation results and the results of laboratory experiments, a wellbottom temperature calculation plate, a viscosity plate of produced fluid flowing from reservoir to wellbore, a viscosity plate of produced fluid flowing in horizontal wellbore and a viscosity plate when produced fluid flows to the wellhead. According to the chart, the viscosity of the produced fluid at different development stages and different flow positions can be judged and predicted, so that the fluidity difference of the produced fluid at different positions can be obtained, and it can provide guidance for the research on replacement technology after CSS in Bohai Oilfield.