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US Department of Defense funded research on treatment of per- and polyfluoroalkyl substance Laden materials (vol 40, pg 44, 2021)

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environmental TOXICOLOGY AND CHEMISTRY 2021年第2期40卷 537-537页

作者： Coyle, C. Ghosh, R. Leeson, A. Thompson, T. Huntsville Engineering & Support Center US Army Corps of Engineers Omaha Nebraska USA Alcoa Pittsburgh Pennsylvania USA Strategic Environmental Research and Development Program and Environmental Security Technology Certification Program US Department of Defense Arlington Virginia USA Science and Engineering for the Environment Seattle Washington USA

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Key fuel characteristics and techno-economic aspects of torrefied rubberwood biomass pellets produced by incorporating various cassava-based binders at varied doses

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environmental science and Pollution Research 2024年第25期31卷 37663-37680页

作者： Kongto, Pumin Palamanit, Arkom Chaiprapat, Sumate Tippayawong, Nakorn Khempila, Jarunee Ruangim, Panatda Energy Technology Program Department of Interdisciplinary Engineering Faculty of Engineering Prince of Songkla University 15 Kanjanavanich Rd. Songkhla Hat Yai90110 Thailand Research Center Faculty of Engineering Prince of Songkla University 15 Kanjanavanich Rd. Songkhla Hat Yai90110 Thailand Department of Civil and Environmental Engineering Faculty of Engineering Prince of Songkla University 15 Kanjanavanich Rd. Songkhla Hat Yai90110 Thailand Department of Mechanical Engineering Chiang Mai University 239 Huay Kaew Rd. Chiang Mai Muang District 50200 Thailand Physics Program Faculty of Science and Technology Rajabhat Maha Sarakham University 80 Nakhon Sawan Rd. Maha Sarakham Mueang District 44000 Thailand

Improving energy content and hydrophobic nature of woody biomass can be pursued through torrefaction. This gives torrefied biomass with a low bulk density, potentially increasing storage and transport costs. To overcome this issue, densifying the torrefied biomass is necessary. However, poor binding of particles makes densification challenging without using a binder. Therefore, the aim of this study was to investigate the physicochemical characteristics and techno-economic aspects of torrefied rubberwood biomass (TRWB) when pelletized using various cassava-based binders at different blending ratios. The selected binders included cassava starch (CS), cassava pulp (CP), and cassava chip (CC). Each binder at 5%, 10%, or 15% (wt.) was mixed with TRWB and water before pelletizing using a flat die machine. The results revealed that pelletizing TRWB with different cassava-based binders at various blending ratios influenced the physicochemical characteristics of the TRWB pellets, particularly dimensions, bulk density, fuel and atomic ratios, and energy content. The TRWB pellets demonstrated energy densities in the range of 7.95–11.39 GJ/m3, and their mechanical durability and fine content fell within acceptable ranges. The TRWB pellets maintained their shape during 120 min of water soaking, with water absorption levels varying by binder dose. The pelletizing ability, material, and energy costs of TRWB pellets depend on binder type and dose. CP can be applied as a binder for pelletizing torrefied rubberwood biomass. However, the mechanical durability of the product needs to be above the user requirement or standard. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Pelletizing

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Geophysical Constraints on Decarbonized Systems—Building Spatio-Temporal Uncertainties into Future Electricity Grid Planning

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Current Sustainable/Renewable Energy Reports 2023年第4期10卷 218-233页

作者： Chowdhury, Afm Kamal Wild, Thomas Deshmukh, Ranjit Iyer, Gokul Galelli, Stefano Earth System Science Interdisciplinary Center University of Maryland College ParkMD20740 United States College ParkMD20740 United States Environmental Studies Program University of California Santa Barbara Santa BarbaraCA93106 United States Bren School of Environmental Science and Management University of California Santa Barbara Santa BarbaraCA93106 United States School of Civil and Environemntal Engineering Cornell University IthacaNY14853 United States

Purpose of Review: Future electricity grids will be characterized by the high penetration of renewables to support the decarbonization process. Yet, this transition will further expose grids to a broad spectrum of geophysical forces, such as weather and climate or the availability of land and minerals. Here, we synthesize the current body of knowledge on the relationship between geophysical constraints and electricity grid planning. Recent Findings: We show that there have been promising advances in the data, methods, and modelling tools needed to incorporate the effect of geophysical constraints on demand, resource availability, and grid operations. However, current research efforts are typically focused on the effect of a single constraint, thereby lacking a broader view of the problem. Summary: More system-specific and finer-scale analyses are necessary to better understand how spatio-temporal variability in geophysical forces affects grid planning. Moreover, we need a broader focus on the multi-sectoral implications of decarbonization efforts, including the societal consequences of grid management decisions. Importantly, all these efforts are challenged by the computational requirements of existing power system models, which often limit our ability to characterize uncertainty and scale analyses across larger domains. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Uncertainty analysis

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Conversion of biochar into sulfonate-bearing solid acids used for the hydrolysis of tylosin:the effect of aromaticity and degree of condensation

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Biochar 2023年第1期5卷 1514-1526页

作者： Qianqian Xie Xiao Yang Binoy Sarkar Xiaomin Dou Piumi Amasha Withana Yong Sik Ok College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083People’s Republic of China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101People’s Republic of China Future Industries Institute University of South AustraliaMawson LakesSA 5095Australia Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoul 02841Republic of Korea International ESG Association(IESGA) Seoul 06621Republic of Korea

In the last few decades,sulfonated carbon materials have garnered significant attention as Brøsted solid acid *** sulfonation process and catalytic activity of sulfonated biochar can be influenced by the aromaticity and degree of condensation exhibited by ***,the relationships between the aromaticity,sulfonating ability,and resultant catalytic activity are not fully *** this study,biochar samples pyrolyzed at 300-650℃ exhibiting different aromaticity and degrees of condensation were sulfonated and employed as sulfonate-bearing solid catalysts for hydrolytically removing *** exhibited excellent hydrolytic performance and their kinetic constants were positively correlated with the total acidity and negatively correlated with their *** study has uncovered the relationship between the structure,properties,sulfonating ability,and subsequent hydrolytic performance of biochar *** was observed that the aromaticity of biochar decreased as the pyrolysis temperature *** pyrolysis temperatures resulted in a reduced degree of condensation,smaller ring size,and an increased number of ring edge sites available for sulfonation,ultimately leading to enhanced catalytic *** findings provide valuable insights into the fundamental chemistry behind sulfonation upgrading of biochar,with the aim of developing functional catalysts for mitigating antibiotics in contaminated water.

关键词： Biochar upgrading Sulfonation Hydrolytic mitigation Tylosin removal Biochar-based solid acids

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Projection of climate change effects on flood inundation in the Gin River basin, Sri Lanka 9

Projection of climate change effects on flood inundation in ...

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9th International Conference on Flood Management, ICFM 2023

作者： Jayapadma, Jayapadma Mudalige Miyuru Uthpala Souma, Kazuyoshi Ishidaira, Hiroshi Magome, Jun Wickramaarachchi, Thushara Navodani Special Educational Program on River Basin Environmental Science Integrated Graduate School of Medicine Engineering and Agricultural Sciences University of Yamanashi 4-3-11 Takeda Yamanashi Kofu400-8511 Japan Interdisciplinary Centre for River Basin Environment University of Yamanashi 4-3-11 Takeda Yamanashi Kofu400-8511 Japan Department of Civil and Environmental Engineering Faculty of Engineering University of Ruhuna Galle Hapugala Sri Lanka

Human-induced climate change has altered the frequency and severity of heavy precipitation, droughts, and floods worldwide. Sri Lanka, a developing country in the Indian Ocean, has suffered frequent floods, affecting over 64 % of the population in the past decade. The Gin River, the primary drinking water source of the densely populated Galle district with over 1 million residents, faces recurrent flood disasters. Therefore, this study employed a multi-model ensemble to simultaneously simulate the impact of climate change on both river flow and inundation extent in the frequently flooded Gin River basin located in humid tropical monsoon region. Bias-corrected climate projections of an ensemble of five General Circulation Models (GCMs) from the Coupled Model Inter-comparison Project Phase 5 (CMIP5) under Representative Concentration Pathway (RCP) 4.5 emission scenario were used to project future river flow and flood inundation in the Gin River basin, Sri Lanka. The validated Rainfall-Runoff-Inundation (RRI) model projected a 5 % increase in high flows (flows exceeding a 5 % probability of exceedance ( Copyright © 2024 Jayapadma Mudalige Miyuru Uthpala Jayapadma et al.

关键词： Floods

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Antibiotic resistant bacteria and genes (ARB and ARG) in water and sewage treatment units: A review

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environmental Nanotechnology, Monitoring and Management 2024年 21卷

作者： Flach, Kauane Andressa Bones, Ubiratan Alegransi Wolff, Delmira Beatriz de Oliveira Silveira, Andressa da Rosa, Genesio Mario Carissimi, Elvis Silvestri, Siara Graduate Program in Environmental Engineering Federal University of Santa Maria Brazil Graduate Program in Environmental Science and Technology Federal University of Santa Maria Brazil

Microorganisms have historically coexisted with humans, animals, and the environment in a natural way. Like any other living being, microorganisms are subjected to environmental pressures that can eventually extinguish or strengthen their existence. In recent years, the emergence of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARG) has raised an alert about their influence on human and animal health. In addition to ARBs found in nosocomial environments, recent studies point to the environment as an auxiliary hotspot for the spread of antimicrobial resistance. In this sense, this review covers research that investigated ARB and ARG in E. coli and Salmonella, occurrence and potential environmental reservoirs for the spread of antimicrobial resistance, as well as a discussion on how bacterial resistance affects public health, the detection and treatment methods currently employed to reduce or remove this pollutant from water treatment plants (WTP) and sewage treatment plants (WWTP). The results indicated that the great increase in bacterial resistance may be linked, among other reasons, to repetitive contact with residual concentrations of antibiotics present in the environment, causing the bacteria to suffer from selective pressure and if resistant to one or more antibiotics. Thus, public health is compromised, since commonly used antibiotics are often ineffective in treating disease-resistant pathogenic bacteria. From this perspective, studies have shown the importance of consistent detection methods, which allow the tracking and analysis of sources of antimicrobial resistance on a global scale, in addition to the need to improve advanced treatment to reduce the ARG and ARB of WTPs and WWTPs. The first two sections of this review article present an overview of the problems related to the occurrence and dissemination of antimicrobial resistance (AMR) in bacteria, with a focus on E. coli and Salmonella, identified by the WHO as bacteria of globa

关键词： Advanced treatments Analytical determination Antimicrobial resistance environmental compartments Public health

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Influence of kinetic air-water interfacial partitioning on unsaturated transport of PFAS in sandy soils

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science of the Total Environment 2024年 957卷 177420页

作者： Vahedian, Faran Silva, Jeff A.K. Šimůnek, Jiří McCray, John E. Civil & Environmental Engineering Department Colorado School of Mines GoldenCO80401 United States Arclight Research & Consulting LLC GoldenCO80401 United States Department of Environmental Sciences University of California RiversideCA92521 United States Civil & Environmental Engineering Department Hydrologic Science and Engineering Program Hydrologic Science & Engineering Program ReNuWit—The Urban Water Engineering Research Center Colorado School of Mines GoldenCO80401 United States

This study investigates the impact of kinetic air-water partitioning on the transport of perfluoroalkyl substances (PFAS) within homogeneous and heterogeneous sandy vadose zones under transient unsaturated flow conditions. These experimental conditions are realistic for field behavior, where transient flow foments the continual growth and collapse of air-water interfaces (AWIs), and where layered heterogenous conditions enhance the perturbations of AWIs. Short-chain PFAS behave like conservative tracers with negligible air-water interface partitioning, whereas longer-chain PFAS demonstrate non-equilibrium retention behavior, especially in heterogeneous media. AWI partitioning kinetics were found to be important in controlling PFAS transport and mass flux, particularly during PFAS sorption to the air-water interface, which results because of the different nature and more rapid changes in AWI during drainage, wherein PFAS are moving toward the interface to achieve equilibrium, than during imbibition, where PFAS are leaving the interface to achieve equilibrium. Neglecting these kinetic AWI sorption processes can result in an underestimate of the PFAS transport velocities and mass flux reaching the water table. The presence of trapped air may also inhibit PFAS partitioning in a similar manner by causing longer diffusion paths from bulk water to a portion of the AWIs. The modified HYDRUS effectively captured the transport processes and provided an excellent match to the measured breakthrough curves. To assess relevance using realistic transient infiltration rates, simulations were conducted using precipitation data from an actual site. The results showed that accounting for kinetic AWI partitioning increases the cumulative PFOS mass flux to groundwater by a factor of 2.3 compared to equilibrium conditions, significantly impacting PFAS porewater concentrations. This difference was threefold under experimental conditions, suggesting that the importance of kinetic effects m

关键词： Transition flow

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Evaluation of HDPE plastic waste as a coarse aggregate substitute in Hot Rolled Sheet-Wearing Course asphalt mixtures 1

Evaluation of HDPE plastic waste as a coarse aggregate subst...

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1st engineering and science International Conference 2024, ESIC 2024

作者： Desriantomy, D. Siantoni, J. Murniati, M. Department of Civil Engineering Faculty of Engineering Universitas Palangka Raya Kampus UPR Tunjung Nyaho Yos Sudarso Street Kotak Pos 2/PLKUP Palangka Raya Central Kalimantan73111 Indonesia Doctoral Program in Environmental Science Postgraduate Program Universitas Palangka Raya Kampus UPR Tunjung Nyaho Yos Sudarso Street Kotak Pos 2/PLKUP Palangka Raya Central Kalimantan73111 Indonesia

Plastic-based goods are commonly used in daily life, but their waste poses significant environmental challenges due to its durability. This study investigates the use of recycled plastic as an artificial coarse aggregate in asphalt mixtures, specifically assessing the effects of High-Density Polyethylene (HDPE) on Hot Rolled Sheet Wearing Course (HRS-WC) mixtures. The objectives are to evaluate the physical properties of the artificial coarse aggregates, identify the optimal asphalt content and Marshall characteristics, and determine the maximum feasible substitution level for these aggregates. A test specimen (briquette) was produced for the Marshall test to assess the mixture properties. Our findings indicate that the maximum allowable substitution of HDPE plastic in HRS-WC mixtures is 42%. With an optimal asphalt content of 7.30%, HDPE substitution levels of 30%, 35%, 40%, 45%, and 50% yielded the highest stability at 45% (1176.696 kg), the highest VMA at 30% (21.250%), and the highest VIM within specifications at 30% (4.998%). The highest VFB value was observed at 45% (88.767%), while the highest Marshall Quotient was at 30% (364.527 kg/mm). The study recommends a maximum HDPE plastic waste substitution level of 40%, highlighting the potential for using HDPE plastic waste in asphalt mixtures to promote more sustainable construction practices. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Aggregates

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Continuous Inactivating Shiga-toxin Producing E. coli in Milk By a Liquid-phase Plasma Process

Continuous Inactivating Shiga-toxin Producing E. coli in Mil...

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2024 American Society of Agricultural and Biological Engineers Annual International Meeting, ASABE 2024

作者： Yuan, Yuan Sheng, Haiqing Deng, Shaobo Mohotti, Dinithi Booker, Taylor Mukhtar, Ahmad Wu, Sarah Department of Chemical and Biological Engineering University of Idaho MoscowID83844 United States Southern Research and Outreach Center University of Minnesota WasecaMN56093 United States Environmental Science Program University of Idaho MoscowID83844 United States

ISBN: (纸本)9798331302214

In this study, we demonstrate that treating milk using a continuous liquid-phase plasma (CLPD) based process is an effective solution. The effect of different system power (180 W-320 W) and flow rate (30 ml/min-70 ml/min) on the inactivation of Shiga-toxin Producing E. coli (STEC) enriched in pasteurized milk was evaluated. Pasteurized milk without STEC enrichment served as a parallel control. Experiments have shown that CLPD-treated milk exhibits a significant reduction in colony-forming units (CFU) of STEC under majority of treatment conditions based on the two significant operational factors. It has been proven that system power and liquid flow rate significantly impact continuous microbial inactivation in milk. A lower flow rate (30ml/min) and higher system power (300w) result in a notable CFU reduction (6.3 logs), while the higher flow rates with lower system power led to milder changes in STEC reduction in milk. Under strong treatment conditions, the STEC inactivation effect was consistent with low variation. Evaluation of the physicochemical properties of CLPD treated milk revealed lower resultant temperatures compared to conventional pasteurization methods. Scanning Emission Microscopy (SEM) imaging has revealed significant cell disruption of STEC by CLPD processing. These findings offer practical insights into cold plasma treatment of milk, suggesting it as a potential alternative to conventional pasteurization methods. © 2024 ASABE Annual International Meeting. All rights reserved.

关键词： Escherichia coli

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The impact of bottom water light exposure on electrical and sediment remediation performance of sediment microbial fuel cells

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Chemosphere 2024年 362卷 142720页

作者： Misali, Rashida Mohd Noor, Nurfarhana Nabila Oktavitri, Nur Indradewi Kim, Kyunghoi Department of Ocean Engineering Pukyong National University Busan48513 Korea Republic of Study Program of Environmental Engineering Faculty of Science and Technology Universitas Airlangga Surabaya60115 Indonesia

Sediment microbial fuel cells (SMFCs) generate bioelectricity from benthic sediments and thus providing both bioelectricity generation and sediment remediation. However, the high internal resistance of the cathode leads to a low power output, which requires research on cathode treatment. In this study, we explored the influence of light irradiation on bioelectricity production and nutrient removal in the SMFC system. The microcosm experiment of the SMFC system was designed with artificial illumination of 500 lux (light-SMFC) and compared with dark conditions of 15 lux (dark-SMFC), which showed that the current increases during photoperiods. The study reveals that light-illuminated SMFC consistently produced the highest voltage, with the highest voltage (553 mV) being 1.3 times higher than the dark-SMFC (440 mV). The polarization curves show a significant reduction in internal cathodic resistance under light condition, resulting in increased voltage generation. The light-SMFC exhibits the highest maximum power density of 35.93 mW/m2, surpassing the dark SMFC of 31.13 mW/m2. It was found that light illumination in the SMFC system increases oxygen availability in the cathodic region, which supports the oxygen reduction reaction (ORR) process. At the same time, the high bioelectricity output contributes to the highest sediment remediation by greatly reducing the chemical oxygen demand (COD) and phosphate (PO4–P) concentrations. The study highlights the potential of light illumination in mitigating cathodic limitation to improve SMFC performance and nutrient removal. © 2024

关键词： Microbial fuel cells

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