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Developing a novel Temporal Air-quality Risk Index using LSTM autoencoder: A case study with South Korean air quality data

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science of the Total Environment 2025年 978卷 179303页

作者： Park, Hyerim Sohn, Wonho Kang, Eunjin Im, Jungho Lee, Junghye Technology Management Economics and Policy Program Seoul National University 1 Gwanak-ro Seoul08826 Korea Republic of Department of Industrial Engineering Ulsan National Institute of Science and Technology 50 UNIST-gil Ulsan44919 Korea Republic of Department of Civil Urban Earth Environmental Engineering Ulsan National Institute of Science and Technology 50 UNIST-gil Ulsan44919 Korea Republic of Institute of Engineering Research Seoul National University 1 Gwanak-ro Seoul08826 Korea Republic of of Engineering Practice Seoul National University 1 Gwanak-ro Seoul08826 Korea Republic of

As public awareness of environmental and health issues grows, providing accurate and accessible environmental risk information is essential for informed decision-making. environmental indices simplify the complex impacts of various environmental factors into a single, interpretable score. The Air Quality Index (AQI) and Air Quality Health Index (AQHI), a widely recognized standard, reflects health risks posed by air pollution but has significant limitations. Conventional index calculations often focus on the single most hazardous pollutant or ignore the combined and cumulative effects of multiple pollutants. Additionally, the commonly used linear and arithmetic approaches can misrepresent actual risks and fail to capture the temporal dynamics of environmental factors. To address these limitations, we propose a deep learning framework for developing a more comprehensive air quality index, the Temporal Air-quality Risk Index (TARI). This framework employs a long short-term memory (LSTM) autoencoder to capture complex interactions and temporal dependencies among environmental factors. By incorporating a risk score (RS) that captures non-linear and continuous risks, TARI provides a more accurate assessment of the environmental impact on health. A case study using real air quality data from South Korea demonstrates that TARI outperforms the Korean Comprehensive Air-quality Index (CAI) and AQHI, exhibiting stronger correlations with disease prevalence. These results highlight TARI's improved sensitivity and relevance in assessing health risks, particularly by addressing cumulative and temporal pollutant effects. To our knowledge, this study is the first to apply deep learning to environmental index development, offering a flexible and robust framework with potential applications across diverse environmental systems. © 2025 Elsevier B.V.

关键词： Haze pollution

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Review of mayflies (Insecta Ephemeroptera) as a bioindicator of heavy metals and microplastics in freshwater

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science of the Total Environment 2025年 958卷 178057页

作者： Benhadji, Nadhira Kurniawan, Setyo Budi Imron, Muhammad Fauzul Institute of Technology and Life Sciences—National Research Institute Falenty Hrabska Avenue 3 Raszyn05-090 Poland Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor UKM Bangi43600 Malaysia Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya60115 Indonesia Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft2628 Netherlands

Heavy metal and microplastic pollutions are prevalent in freshwater ecosystems, with many freshwater bodies being contaminated by one or both of these pollutants. Recent studies reported extreme detections of Cd, Pb and Zn, high concentrations of Cr, Pb and Cu and microplastics acting as vectors of pollutants, including heavy metals. Mayflies can serve as bioindicators of heavy metal contamination in freshwater ecosystems because changes in their community structure, physiology, and behaviour can reflect and help predict the concentrations of metals in these environments. This review discusses the ecological alterations induced by tissue metal concentration in mayflies and other macroinvertebrates. As sensitive taxa to heavy metal contamination, mayflies can reflect the impacts of this pollution through their ethology and relationship to the substrate, highlighting issues such as eutrophication, alterations in community structure, inhibitory effects and sediment toxicity. Mayflies are also highly affected by microplastic exposure, which leads to ingestion, bioaccumulation, biomagnification, habitat and community alteration, behavioural changes, physiology alteration and toxicity. Mayflies bioindication metrics for assessing the impact of heavy metals and microplastics include the examination of community alteration, functional feeding behaviour, molecular structure, dietary and toxicity impacts, bioaccumulation and biomagnification and biomarkers. Current challenges for the utilization of mayflies as bioindicators include temporal variations in sensitivity, lack of universally recognised protocols and need for standardised protocols for microplastic analysis. Additionally, the applicability of mayflies as bioindicators may vary across different ecosystems, emphasising the need for selecting suitable indicators that align with the unique characteristics of the ecosystem. © 2024 The Authors

关键词： Macroinvertebrates

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A METHOD FOR DETERMINING IN-USE EFFICIENCY OF STAGE-II VAPOR RECOVERY-SYSTEMS

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ENVIRONMENT INTERNATIONAL 1994年第2期20卷 201-207页

作者： MACINTOSH, DL HULL, DA BRIGHTMAN, HS YANAGISAWA, Y RYAN, PB Environmental Science and Engineering Program Department of Environmental Health Harvard University School of Public Health Boston MA 02115 U.S.A.

A practical methodology has been developed to evaluate the in-use efficiency of Stage II vapor recovery systems. While the theoretical efficiency of these vapor recovery systems may be measured in chamber studies, their true effectiveness can only be assessed in the field under normal operating conditions. VOC concentrations during automobile refueling were measured at a gasoline station with conventional pumps and a station equipped with a Stage II vapor recovery system. A dual VOC sampling train was developed in order to minimize measurement variability caused by environmental conditions. The results showed a significant difference between VOC emissions during refueling at the Stage II and conventional gasoline stations investigated. The estimated efficiency per refueling of the vapor recovery system at the Stage II station, relative to the conventional station, was between 81% and 93%. Although gasoline spills during refueling have been documented as greater at typical Stage II stations as compared to conventional stations, the presented results indicate the magnitude of these spills is insufficient to substantially undermine the overall efficacy of these vapor recovery systems.

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Improving the Performance of Asphalt Mixtures with Highly Acidic Aggregates in Central Vietnam Using Modifier Based on Styrene-Butadiene-Styrene and Rosin Resin

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Journal of Materials in Civil engineering 2025年第7期37卷

作者： Nguyen, Lan Ngoc Lee, Hosin David Bui, Lam Tung Kim, Young-Ik Truong, Van Quyet Nguyen, May Huu Nguyen, Du Van Dept. of Construction Materials Faculty of Construction Engineering Univ. of Transport and Communications No. 03 Cau Giay Hanoi100000 Viet Nam Dept. of Civil and Environmental Engineering Iowa Technology Institute The Univ. of Iowa Iowa CityIA52242 United States Research Dept. Hansoo Natech Co. Ltd. 6-20 Yuseong-daero 1205beon-gil Yuseong-gu Daejeon34104 Korea Republic of Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima Univ. 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8527 Japan Faculty of Civil Engineering Univ. of Transport and Communications Campus in Ho Chi Minh City Ho Chi Minh City700000 Viet Nam

In Central Vietnam, the aggregate typically originates from highly acidic rocks containing a significant amount of silicon dioxide (SiO2), leading to poor adhesion quality with virgin asphalt binder. Hence, the asphalt mixture production usually needs to utilize adhesion promoters. Based on the chemical compositions of the sample aggregate (up to 72.3% SiO2), research has been conducted to introduce an adhesive agent called rubber modified compound (RMC-160), which is composed of styrene-butadiene-styrene (SBS) with petroleum hydrocarbon resin, treated clay and mineral oil. This article presents the research findings regarding the adhesion effectiveness of RMC-160-modified asphalt binder to high acid-based aggregate through laboratory and field tests, along with the mixture performance under both short-term oven aging (STOA) and long-term oven aging (LTOA). The test results exhibited remarkable effects, whereby the asphalt binder modified with RMC-160 additive significantly increased the adhesion level from Grade 2 to Grade 4, and the asphalt mixtures containing RMC-160 had lower rutting and higher cracking tolerance (CTIndex) under both the STOA and LTOA conditions. © 2025 American Society of Civil Engineers.

关键词： Silicon oxides

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Catalytic Peroxymonosulfate activation via In-Situ ketone Derivatives: Unveiling dual kinetics in electrochemical degradation

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Separation and Purification Technology 2025年 375卷

作者： Zhen Liu Rong Liu Siqi Chen Mengyu Li Yuhang Liu Bangxing Ren Huan He Shuquan He Xiaodi Duan Yao Chen School of River and Ocean Engineering Chongqing Jiaotong University Chongqing 400074 China Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission Chongqing Jiaotong University Chongqing 400074 China Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (ChEE) University of Cincinnati Cincinnati OH 45221-0071 USA School of Environmental Science and Engineering Kunming University of Science and Technology Kunming Yunnan 650500 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China

This study reports for the first time the dual kinetics phenomenon triggered by the in situ generated ketone derivatives in the cathode chamber and reveals the mode of catalytic persulfate activation through electron exchange by the conversion of ketone functional groups to ketone derivatives. The experimental results show that the reaction rate constant in the rapid degradation stage in the cathode chamber (42.62 × 10 -2 min −1 ) is significantly higher than that in the induction stage (2.11 × 10 -2 min −1 ), achieving 98.96 % removal within 25 min. The intermediate validation experiments indicate that the in-situ generation of ketone-containing intermediates in the cathode chamber increases the steady-state concentration of reactive species (from 1.71 × 10 -10 to 1.08 × 10 -9 ML -1 ), which is the main reason for the increased reaction rate. The ketone capture experiments and density functional theory (DFT) calculations show that the intermediates with ketone functional groups exchange electrons with persulfate ions under alkaline conditions and in the presence of an electric field, generating additional sulfate radicals and singlet oxygen. In the cathode chamber, the electrochemical activation of Peroxymonosulfate (PMS) by ketones on intermediate products is expected to become an inherent catalytic technology for the selective oxidation of pollutants occurring in aquatic environments.

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DIFFUSION AND PARTITIONING OF HEXACHLOROBIPHENYL IN SEDIMENTS

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environmental science & TECHNOLOGY 1985年第12期19卷 1169-1176页

作者： DITORO, DM JERIS, JS CIARCIA, D Environmental Engineering and Science Program Manhattan College Bronx New York 10471 United States

The diffusion coefficient and partition coefficient of hexachlorobiphenyl (HCBP) in a sediment are determined by using a dual radio-tag experiment that extended over 2 years. Essentially constant coefficients were observed. An independent measurement of the diffusion coefficient for a nonsorbing chemical (tritiated water) allows an estimate to be made of the interstitial water-sediment partition coefficient. The result is in close agreement with that predicted from hydrophobic sorption correlations based upon sediment organic carbon and HCBP octanol-water partition coefficient. It also corresponds to the low particle concentration limit of the partition coefficients found when batch equilibrations of dilute suspensions of the same sediment were used. © 1985, American Chemical Society. All rights reserved.

关键词： Organic compounds

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Sesquiterpenes from the Saudi Arabian Red Sea sponge Lamellodysidea herbacea

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Phytochemistry Letters 2025年 67卷

作者： Tammam, Mohamed A. Tziveleka, Leto-Aikaterini Duarte, Carlos M. Ioannou, Efstathia Roussis, Vassilios Section of Pharmacognosy and Chemistry of Natural Products Department of Pharmacy National and Kapodistrian University of Athens Panepistimiopolis Zografou Athens 15771 Greece Department of Biochemistry Faculty of Agriculture Fayoum University Fayoum 63514 Egypt Marine Science Program Division of Biological and Environmental Sciences and Engineering King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia

Eleven sesquiterpenes (1–11), with the majority of them decorated with either a furan or a γ-lactone moiety in their carbocycle, were isolated from an organic extract of the marine sponge Lamellodysidea herbacea collected from the coral reefs in the vicinity of Thuwal in Saudi Arabia. Two of the isolated metabolites (1 and 2) are not previously described, whereas the linear furanosesquiterpene 11 is reported for the first time from a natural source. The structures and the relative configurations of the isolated metabolites have been determined through extensive analysis of their NMR and MS data. Compounds 1–11 were evaluated for their antibacterial and antioxidant activity but did not display any noteworthy activity. © 2025 Phytochemical Society of Europe

关键词： Dysideidae Lamellodysidea herbacea Red Sea Saudi Arabia Sesquiterpenes Sponge

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Development of ceramic membranes from sugarcane bagasse ash for microfiltration of biodiesel production effluents

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Open Ceramics 2025年 22卷

作者： Pin, Clarissa Ferreira Brandler, Danieli Flores, Gabriela Cristina Perusin Kubiaki Levandoski, William Mateus Bruschi, Giovani Jordi Pelissaro, Deise Trevizan Dervanoski, Adriana Korf, Eduardo Pavan Pasquali, Gean Delise Leal Graduate Program in Enviromental Science and Technology Federal University of Fronteira Sul Erechim/RS 99700-970 Brazil Departament of Civil Engineering Integrated Regional University of Alto Uruguai and Missões – Erechim/RS 99709-910 Brazil Departament of Environmental and Sanitary Engineering Federal University of Fronteira Sul Erechim/RS 99700-970 Brazil

Ceramic membranes have emerged as a promising solution for microfiltration processes, offering advantages such as cost-effectiveness, environmental benefits, and the utilization of abundant raw materials derived from agro-industrial solid waste. This study investigates the fabrication and performance of ceramic membranes composed of kaolin the varying proportions of sugarcane bagasse ash (SCBA - 40 wt % and 60 wt %), with focus on efficiency in treating biodiesel wastewater. The membranes were characterized (porosity, average pore diameter, and mechanical strength). The membrane containing 40 wt % SCBA - employed without any pre-treatment- exhibited the best overall performance, achieving porosity of 38.5 %, an pore diameter of 0.9 µm, and mechanical strength of 27 MPa, indicating a favorable balance between permeability and structural integrity. The best-performing membrane achieved removal efficiencies of color 83 % and turbidity 67 %. Microstructural analysis revealed a network of interconnected mesopores, which are particularly effective for the retention of colloidal and suspended contaminants. © 2025 The Authors

关键词： Agro-industrial solid waste Industrial effluent Membrane filtration

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Copper single atoms/atomic clusters modified electrocatalytic membrane for antibiotic removal and membrane fouling control via electro-Fenton reactions

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Chemical engineering Journal 2025年 515卷

作者： Zhang, Zixin Huang, Guohe Li, Yongping Yao, Yao Chen, Xiujuan Zhang, Yuanzheng Luo, Yifei Zhao, Kai State Key Laboratory of Regional Environment and Sustainability School of Environment Beijing Normal University Beijing100875 China State Key Laboratory of Regional Environment and Sustainability China-Canada Center for Energy Environment and Ecology Research UR-BNU School of Environment Beijing Normal University Beijing100875 China Environmental Systems Engineering Program University of Regina ReginaSKS4S 0A2 Canada Institute for Energy Environment and Sustainable Communities University of Regina ReginaS4S 0A2 Canada Department of Civil Engineering The University of Texas at Arlington ArlingtonTX United States College of Environmental Science and Engineering North China Electric Power University Beijing102206 China

Low-pressure membrane filtration is an important technology for water treatment but suffers from the inefficient removal of low-molecular-weight pollutants (such as antibiotics) and severe membrane fouling. Herein, an electrocatalytic membrane (CuSAs/ACs-NC/CMM) modified with the catalyst containing Cu single atoms (SAs) and atomic clusters (ACs) composite active sites was prepared for the removal of tetracycline (TC) and the control of membrane fouling. Cu ACs synergistically interacted with Cu SAs, enabling a high-efficiency electro-Fenton process. In addition to serving as the main active site for the in-situ generation of H2O2, Cu ACs could also induce the charge rearrangement of Cu SAs, thus reducing the energy barrier of H2O2 activation into ·OH at the Cu SAs site. CuSAs/ACs-NC/CMM produced ·OH through a sequential reaction of H2O2 generation and activation to oxidize pollutants. At a low voltage of −2.5 V, CuSAs/ACs-NC/CMM delivered excellent TC removal kinetics (0.0181 min−1) and removal ratio (90.0 %), and effectively reduced the membrane fouling caused by the mixture of humic acid (HA), bovine serum albumin (BSA), and sodium alginate (SA). CuSAs/ACs-NC/CMM also performed well under actual water conditions. This work proposes a strategy for developing electrocatalytic membranes using catalysts with multiple atomic-level active sites, promoting the development and application of advanced membranes in water treatment. © 2025 Elsevier B.V.

关键词： Membrane fouling

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Biochar supported metal cobalt activated PAA to efficiently degrade CBZ: The important role of Co (IV) in the generation of peroxyacyl radicals

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Journal of Water Process engineering 2025年 75卷

作者： Mengyu Li Shaochun Yuan Yuhang Liu Siqi Chen Mingyang Si Rong Liu Bangxing Ren Zhe Zhang Zhen Liu School of River and Ocean Engineering Chongqing Jiaotong University Chongqing 400074 China Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission Chongqing Jiaotong University Chongqing 400074 China Environmental Engineering and Science Program Department of Chemical and Environmental Engineering (ChEE) University of Cincinnati Cincinnati OH 45221-0071 USA

This study utilized biochar-supported transition metal cobalt as a model catalyst to activate peracetic acid (PAA) for carbamazepine (CBZ) degradation. The acetyl peroxyl radical (CH 3 (CO)OO•) was identified as the predominant reactive oxygen species (ROS) responsible for CBZ degradation in this system, with its generation primarily facilitated by the catalytic activation of PAA mediated by high-valent cobalt species [Co(IV)]. The generation of Co(IV) species occurs via PAA-mediated stepwise single-electron oxidation of Co(II). Comprehensive characterization techniques (SEM, XRD, FTIR, XPS) demonstrated that cobalt-modified biochar (Co@BC 700°C ) exhibits a layered structure with increased surface area and numerous functional groups. The incorporation of cobalt simultaneously increases active site density and optimizes electron transfer efficiency within the BC. As a result, Co@BC 700°C activated PAA achieved efficient degradation of CBZ within 10 min under weakly acidic conditions. The comprehensive free radical investigation experiments collectively demonstrated that CH 3 (CO)OO• as the dominant reactive species driving CBZ degradation. Meanwhile, chemical trapping experiments confirmed that Co(IV) species significantly influence the degradation of CBZ, and the primary role of Co(IV) species is to mediate the generation of CH 3 (CO)OO• via electron transfer mechanisms. Furthermore, integrated toxicological assessments and circulation experiments verified the catalytic potential of Co@BC 700°C , demonstrating sustained removal efficiency in complex aqueous environments containing competitive anions and natural organic species. The results of this study provide innovative understanding of CH 3 (CO)OO• formation through Co(IV)-activated PAA catalysis, as well as a unique viewpoint on applying PAA-driven advanced oxidation technologies for wastewater treatment.

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