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World environmental and Water Resources Congress 2022: Adaptive Planning and Design in an Age of Risk and Uncertainty

作者： Zambon, Renato C. Marins, José C. Yeh, William W.-G. Dept. of Hydraulic and Environmental Engineering Univ. of São Paulo Brazil Graduate Program In Energy Institute of Energy and Environment Univ. of São Paulo Brazil Dept. of Civil and Environmental Engineering Univ. of California Los Angeles United States

ISBN: (数字)9780784484258

ISBN: (纸本)9780784484258

The Metropolitan Region of São Paulo (MRSP) water supply system in Brazil is one of the largest in the world. It supplies water to 21.5 million inhabitants and is upstream of the Metropolitan Region of Campinas. The region has 3.1 million inhabitants in the Piracicaba, Capivari, and Jundiaí River basins (PCJ). The water supply system consists of seven main reservoir subsystems and is currently recovering from the worst drought in history. Cantareira subsystem is the largest in both water supply and storage capacity. It transfers water from the PCJ to the MRSP. There are two newly built water transfer systems: one from the Jaguari Reservoir, directly linked to the Cantareira subsystem, and another from the São Lourenço Reservoir, which is connected to a new water treatment plant. Both water transfer systems operate at very high energy costs. Additionally, there exist conflicts among all water users. The primary role of the two new water transfer systems was to increase water security. Since 2017, the newly imposed minimum required flows at PCJ increased the releases from Cantareira subsystem by 5 m3/s. But this increase necessitates both São Lourenço and Jaguari to operate at almost full capacity as well as at much higher energy cost, while the less expensive Cantareira subsystem stands operating with idle capacity to sustain higher required downstream releases. Currently, Brazil is facing a new record-breaking drought, now in the southeast region, with simultaneous water and energy crisis. In this paper we use SISAGUA, a previously developed nonlinear optimization model, to evaluate the impacts of the modified constraints on the management of the MRSP water supply system, considering energy consumption, operational costs, and water security. © ASCE.

关键词： Water supply

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Influence of the Corrosion Degree of Hot-Dipped Galvanized Reinforcements on its Bond Strength to Concrete

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SSRN 2024年

作者： da Fonsêca, Márcia Suzanna Dutra Abreu Borges Meira, Gibson Rocha The Civil and Environmental Engineering of Federal University of Paraíba João Pessoa Brazil The Federal Institute of Education Science and Technology of Paraíba João Pessoa Brazil The Civil and Environmental Engineering Post-graduate Program of Federal University of Paraíba João Pessoa Brazil

This work studies the behavior of hot-dipped galvanized steel against chloride corrosion and its effect on its bond strength to concrete. Two steel diameters were adopted and bond strength was assessed using a standardized pull-out test, followed by measuring different degrees of corrosion. The results show that the initial corrosion of hot-dipped galvanized steel, due to the high alkalinity of fresh concrete, does not affect the structural performance of reinforced concrete and that galvanized steel has superior bond strength to concrete than non-galvanized steel for small corrosion rates. However, it decreases as the corrosion degree significantly increases. © 2024, The Authors. All rights reserved.

关键词： Reinforced concrete

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Acid-catalyzed hydrothermal treatment of sewage sludge: effects of reaction temperature and acid concentration on the production of hydrolysis by-products

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Biomass Conversion and Biorefinery 2023年第9期13卷 7533-7546页

作者： Pham, Van Toi Guan, Chung-Yu Han, Po-Chun Matsagar, Babasaheb M. Wu, Kevin C. W. Ahamad, Tansir Chang, Ching-Yuan Yu, Chang-Ping Graduate Institute of Environmental Engineering National Taiwan University Taipei106 Taiwan Faculty of Environmental Engineering National University of Civil Engineering 55 Giai Phong Hai Ba Trung Hanoi100000 Viet Nam Department of Environmental Engineering National Ilan University Yilan260 Taiwan Ph.D. Program of Green Materials and Precision Devices National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Water Innovation Low Carbon and Environmental Sustainability Research Center National Taiwan University Taipei106 Taiwan

Sewage sludge (SS) is an organic biomass from wastewater treatment plants, but the use of SS to produce bio-based chemicals under acid-catalyzed hydrolysis (ACH) processes is not well investigated. In this study, ACH processes were performed at 120, 150, and 180 °C using sulfuric acid (H2SO4) with concentrations of 0–0.5 M within a reaction time of 90–180 min to produce bio-based chemicals from SS. The results showed that the reaction temperature, reaction time, and concentrations of H2SO4 affected the yields of sugars, levulinic acid (LA), and 5-hydroxymethylfurfural (HMF). The highest xylose and glucose yields were 7.69 mol% and 5.22 mol% at 120 °C with 0.5 M H2SO4 during the 180 min of reaction time, respectively. Besides, under the ACH process at 180 °C and 180 min, the yield of LA reached a maximum value of 0.48 mol% at 0.5 M H2SO4, and the highest yield of HMF was 1.66 mol% at 0.1 M H2SO4. The data obtained also indicated that the ACH process led to an increase in soluble chemical oxygen demand, dissolved organic carbon, and total dissolved nitrogen. Fluorescence excitation-emission matrix of dissolved organic matter and thermogravimetric analysis of the treated SS further supported the enhanced solubilization of SS after ACH process, especially under higher reaction temperature and concentrations of H2SO4. Although the lower yields of bio-based chemicals might restrict the downstream recovery of the target products, the largely improved SS solubilization by ACH suggests that acid-catalyzed hydrothermal hydrolysis process has potential as an alternative pretreatment method of SS. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： Sewage sludge

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Unravelling biosynthesis and biodegradation potentials of microbial dark matters in hypersaline lakes

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environmental Science and Ecotechnology 2024年第4期20卷 177-188页

作者： Zhiguang Qiu Yuanyuan Zhu Qing Zhang Xuejiao Qiao Rong Mu Zheng Xu Yan Yan Fan Wang Tong Zhang Wei-Qin Zhuang Ke Yu School of Environment and Energy Peking University Shenzhen Graduate SchoolShenzhen518055China AI for Science(AI4S)-Preferred Program Peking UniversityShenzhen518055China Southern University of Sciences and Technology Yantian Hospital Shenzhen518081China Institute of Biomedicine and Biotechnology Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China State Key Laboratory of Isotope Geochemistry CAS Center for Excellence in Deep Earth ScienceGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China School of Atmospheric Sciences Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai519082China Department of Civil Engineering University of Hong Kong999077Hong KongChina Department of Civil and Environmental Engineering Faculty of EngineeringUniversity of AucklandNew Zealand

Biosynthesis and biodegradation of microorganisms critically underpin the development of biotechnology,new drugs and therapies,and environmental ***,most uncultured microbial species along with their metabolic capacities in extreme environments,remain *** we unravel the metabolic potential of microbial dark matters(MDMs)in four deep-inland hypersaline lakes in Xinjiang,*** metagenomic binning,we uncovered a rich diversity of 3030 metagenomeassembled genomes(MAGs)across 82 phyla,revealing a substantial portion,2363 MAGs,as previously unclassified at the genus *** unknown MAGs displayed unique distribution patterns across different lakes,indicating a strong correlation with varied physicochemical *** analysis revealed an extensive array of 9635 biosynthesis gene clusters(BGCs),with a remarkable 9403 being novel,suggesting untapped biotechnological ***,some MAGs from potentially new phyla exhibited a high density of these *** biosynthesis,our study also identified novel biodegradation pathways,including dehalogenation,anaerobic ammonium oxidation(Anammox),and degradation of polycyclic aromatic hydrocarbons(PAHs)and plastics,in previously unknown microbial *** findings significantly enrich our understanding of biosynthesis and biodegradation processes and open new avenues for biotechnological innovation,emphasizing the untapped potential of microbial diversity in hypersaline environments.

关键词： Biosynthesis Biodegradation Hypersaline lakes Metagenome-assembled genomes Microbial dark matters

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Partitioning Uncertainty from Climate Change Inputs on Streamflow Projections in the Bicol River Basin, Philippines

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SSRN 2025年

作者： Bañares, Ernie Nograles Mehboob, Muhammad Shafqat Panda, Manas Ranjan Engineering Graduate Program School of Engineering University of San Carlos Cebu City6000 Philippines College of Engineering and Architecture Sorsogon State University Sorsogon City4700 Philippines Department of Civil Engineering School of Engineering University of San Carlos Cebu City6000 Philippines Department of Civil & Environmental Engineering Yonsei University Seoul Korea Republic of

Increasing threats to global water resources from climate change emphasize the importance of comprehending its impacts on hydrology for effective water management. This article quantifies climate input uncertainty in streamflow projections for the Libmanan-Pulantuna Watershed (LPW) in the Bicol River Basin, Philippines. Using the Water Evaluation and Planning (WEAP) model, we simulated streamflow based on future climate projections (FCPs) from Intergovernmental Panel on Climate Change (IPCC) greenhouse-gas emission scenarios, utilizing Coupled Model Intercomparison Project phases 5 (CMIP5) and 6 (CMIP6) datasets. Four Global Circulation Models (GCMs) and three bias correction techniques (Linear Scaling, Quantile Mapping, and Detrended Quantile Mapping) were applied. Results showed significant differences between the CMIP datasets, with raw CMIP6 better capturing historical climate patterns. Bias correction methods reduced projection biases in precipitation and air temperatures. Projections revealed increasing low flows and decreasing high flows, especially under high-emission scenarios, worsening water shortages during critical periods. Analysis of Variance (ANOVA) showed that climate models were a major source of uncertainty in hydrological projections. Combined FCPs and GCMs contributed to 50%-75% of total uncertainty across flow percentiles and future periods (near-future, mid-future, far-future). These findings underscore the importance of careful model selection and effective bias correction for reliable hydrological projections, crucial for water management strategies in areas like the Bicol River Basin, where water resources are essential for communities and ecosystems. © 2025, The Authors. All rights reserved.

关键词： Rivers

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Production of 5-hydroxymethylfurfural from fructose via inherent catalytic properties of a biphasic system without external catalyst addition

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Green Chemistry 2023年第3期26卷 1533-1541页

作者： Huynh, Quang Tam Padilla, Alexander F. de Luna, Mark Daniel G. Huang, Po-Jung Chen, Pei-Shih Saidina Amin, Nor Aishah Chen, Ku-Fan Chang, Ken-Lin Institute of Environmental Engineering National Sun Yat-Sen University Kaohsiung804 Taiwan Energy Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City1101 Philippines Department of Chemical and Materials Engineering National Central University Taoyuan320317 Taiwan Department of Public Health College of Health Sciences Kaohsiung Medical University Kaohsiung Taiwan Johor Bahru Skudai81310 Malaysia Department of Civil Engineering National Chi Nan University Nantou545 Taiwan Net Zero Emissions and Resource Recycling Technology Research Center National Sun Yat-Sen University Kaohsiung804 Taiwan

5-Hydroxymethylfurfural (5-HMF) is the key to unlocking the potential of biomass materials to transform into fuels, materials, and chemicals. In this study, an effective biphasic reaction system composed of a reaction phase (aqueous phase) and an extraction phase (organic phase) was used for the conversion of fructose to 5-HMF. Deep eutectic solvents (DESs) composed of different hydrogen bond donors and hydrogen bond acceptors, the ionic liquid [BMIM]Cl, aqueous choline chloride, aqueous betaine hydrochloride, and ethylamine hydrochloride were used as the reaction phase, and different organic solvents, such as methyl isobutyl ketone (MIBK), dimethyl sulfoxide (DMSO), toluene, ethyl butyrate, and gamma-valerolactone (GVL), were used as the organic phase. Experiments were conducted under optimal conditions simulated using the reaction surface method to obtain the maximum 5-HMF yield. The highest yields of 5-HMF obtained in reactions with DESs were 67.86%, 68.69%, and 71.40% for ChCl : OA, ChCl : Lac, and EaCl : Lac, respectively. However, adding dimethyl sulfoxide and betaine hydrochloride aqueous solution to the fructose conversion system resulted in a maximum yield of 90.42% ± 1.46% of 5-HMF without the use of catalysts. This study also demonstrated that betaine hydrochloride could be effectively reused four times. A 5-HMF yield of at least 80% indicates a green process suited towards sustainable development. © 2024 The Royal Society of Chemistry.

关键词： Fructose

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Unsaturated Strength of Tage Tuff and Its Water Retention Drying Curve

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Zairyo/Journal of the Society of Materials Science, Japan 2024年第3期73卷 212-219页

作者： Kotabe, Haruhiko Togashi, Yota Hatakeyama, Ken Osada, Masahiko Civil and Environmental Engineering Program Graduate School of Science and Engineering Saitama University Shimo-Okubo Sakura-ku Saitama338-8570 Japan Integrated Technical Support Center Research Organization Saitama University Shimo-Okubo Sakura-ku Saitama338-8570 Japan

Strength loss of sedimentary rocks due to water content changes is an important issue in the civil engineering field. Assuming disasters associated with rainfall and drying, it is important to identify unsaturated strength properties for gradually varying moisture contents. Water retention curves are needed to describe unsaturated strength properties. The high suction acting in the case of rock presents a challenge in identifying the suction. In particular, identifying the water retention drying path is difficult. This study propose a method to identify the drying paths using uniaxial compressive strength and tensile strength of Brazilian test. Uniaxial compression and Brazilian tests were performed on specimens with varying water content in the drying pass to investigate changes in their mechanical properties. Strength and stiffness were found to be approximately halved in the wet condition compared to the dry condition. Simplified Mohr-Coulomb failure criteria are also identified using uniaxial compressive and tensile strength. The cohesion decreases with increasing water content, while the angle of shear resistance is independent of changes in water content. Suction at each saturation level was back-analyzed using the detected cohesion and shear resistance angles to identify the water retention drying curve. The water retention drying curves identified were compared with the water retention wetting curve identified by another method to confirm the validity of the proposed method. ©2024 The Society of Materials Science, Japan.

关键词： Sedimentary rocks

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The fate of antibiotics during phosphate recovery processes - A critical review

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Science of the Total Environment 2025年 968卷 178829页

作者： Bolujoko, Nathaniel Duling, Addison Shashvatt, Utsav Mangalgiri, Kiranmayi Environmental Science Graduate Program Oklahoma State University 202 Whitehurst StillwaterOK74078 United States Department of Biosystems and Agricultural Engineering Oklahoma State University 215A Agricultural Hall StillwaterOK74078 United States Department of Civil and Environmental Engineering University of California Berkeley 760 Davis Hall BerkeleyCA94720 United States

The principles of circular economy encourage the recovery of phosphorus from nutrient-rich waste streams such as animal manure, domestic wastewater, and urine to supplement existing sources of raw phosphorus. However, these waste streams also contain a wide variety of contaminants of emerging concern including antibiotics, and the recovery of phosphorus from these waste streams results in the co-occurrence of antibiotics with the recovered phosphorus products. This paper provides a comprehensive overview of the fate of environmentally relevant antibiotics in three major existing and upcoming phosphorus recovery processes: precipitation-, membrane-, and adsorption-based treatment. In general, the co-occurrence of antibiotics in recovered phosphorus increases with the presence of dissolved organic matter (DOM) and cations due to π-π interaction and cationic bridge formation, respectively. Additionally, antibiotics display pH-based speciation resulting in electrostatic interactions with recovered phosphorus at pH > 7.0. Furthermore, this critical review establishes a new metric, the relative antibiotic-to‑phosphorus (RAP), defined as the ratio of the concentration of antibiotics to phosphorus in recovered phosphorus to that of the phosphorus-rich waste. Precipitation-based methods, particularly struvite, demonstrated the lowest RAP, while the RAP in carbon-based adsorbents was 1.8 × 108 times higher than in membrane-based processes. In reviewing literature on the fate of antibiotics in phosphorus recovery processes, several research needs are also highlighted: the fate of non-tetracycline antibiotics, simultaneous investigation of phosphorus and antibiotic fate in membrane- and adsorption-based methods, treatment methods to mitigate the co-occurrence of antibiotics in recovered phosphorus product, and the release of antibiotics from recovered phosphate products. © 2024

关键词： Rivers

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Design of a Central Tool for Sustainability Evaluation and Weighting to Decision-Making Support of Contaminated Soils Remediation

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SSRN 2023年

作者： Braun, Adeli Beatriz Visentin, Caroline Thomé, Antônio Graduate Program in Civil and Environmental Engineering University of Passo Fundo BR 285 São José Rio Grande do Sul Passo Fundo99052-900 Brazil

Sustainable remediation remains unstandardized and ambiguously regulated, thereby limiting its adoption in the management of contaminated areas. Although a considerable number of tools are available for this purpose, numerous shortcomings continue to be detected, especially with regard to the integration of a complete assessment of impact and sustainability into a single framework. In view of these problems, this study developed and validated an integrated tool for assessing the sustainability of remediation techniques for contaminated soils. To support the sustainability analysis, we prepared impact assessment matrices, which list components and criteria for obtaining integrated impact scores for each sustainability dimension/pillar (i.e., social, economic, and environmental), factor, and component. These impact scores were incorporated and fitted into a mathematical model used to ascertain the sustainability of the techniques. The tool was subsequently validated by comparing and analyzing the sustainability with which five techniques: phytoremediation, electrokinetics and excavation/disposal (Case Study I), nanoremediation and soil washing (Case Study II). The techniques’ probabilities of sustainability followed the order presented in the preceding statement. The determination of sustainability was supported by the direct interaction between the effects derived under each dimension and technique. These findings led to the conclusion that the proposed tool prioritizes the basic principles of sustainability, which call for harmony among the three pillars, and that it is a favorable instrument for the evaluation and selection of a sustainable remediation technique. © 2023, The Authors. All rights reserved.

关键词： Sustainable development

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Design of a Central Tool for Sustainability Evaluation and Weighting to Decision-Making Support of Contaminated Soils Remediation

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SSRN 2023年

关键词： Sustainable development

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