Journal of Environmental Sciences-china最新文献

{"title":"Residential greenness, air pollution, and incident age-related macular degeneration: A prospective cohort study","authors":"Jiali Wang ,&nbsp;Yinyan Gao ,&nbsp;Yijuan Lin ,&nbsp;Irene X.Y. Wu ,&nbsp;Fang Xiao","doi":"10.1016/j.jes.2025.04.014","DOIUrl":"10.1016/j.jes.2025.04.014","url":null,"abstract":"<div><div>Existing evidence suggests residential greenness is beneficial to human, while no research to date explored the associations of greenness with age-related macular degeneration (AMD). To evaluate the association of greenness with AMD, modification and mediation effect of air pollution, we conducted this prospective study. We constructed weighted quantile sum (WQS) index as co-exposure to nitrogen oxides (NO_<em>x</em>), particulate matter &lt;2.5 µm (PM_2.5), particulate matter &lt;10 µm (PM₁₀). Stratified Cox regression models were applied to test the effect of exposure. Effect modification of air pollution was assessed. Stratified Cox models through the indirect method and Aalen additive risk models were used in mediation analysis. Over median follow-up of 11.67 years, 4596 AMD events were ascertained. Hazard ratios (HRs) and 95 % confidence intervals (95 % CIs) of incident AMD for pollution per interquartile range (IQR) increment were 1.10 (1.04–1.16) for nitrogen dioxide (NO₂), 1.09 (1.03–1.15) for NO_<em>x</em>, 1.14 (1.05–1.24) for PM_2.5, 1.13 (1.05–1.21) for PM₁₀. The HR (95 % CI) of AMD associated with greenness 1000 m buffer per IQR increment was 0.91 (0.86–0.97), 300 m buffer was 0.94 (0.89–0.99). The association between greenness 1000 m and AMD was 28.59 %, 44.77 %, 35.59 %, 32.31 % and 27.08 % mediated by the decreased WQS index, NO₂, NO_<em>x</em>, PM_2.5 and PM₁₀, respectively. Increased greenness was associated with lower AMD incidence, and air pollution partly mediate it, which implies that interventions aimed at improving air quality and increasing greenness could have a dual benefit in mitigating AMD risk.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 242-249"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced anaerobic degradation of BTEX in cabin-washing wastewater using iron-carbon composites","authors":"Yuzhu Huang ,&nbsp;Jiahui Chen ,&nbsp;Shaokang Deng ,&nbsp;Xinhua Xu ,&nbsp;Lihua Cheng","doi":"10.1016/j.jes.2025.04.023","DOIUrl":"10.1016/j.jes.2025.04.023","url":null,"abstract":"<div><div>The management and treatment of cabin-washing wastewater has received increasing attention in China. To improve the anaerobic degradation of benzene, toluene, ethylbenzene, and xylenes (BTEX) in cabin-washing wastewater, the addition of iron-carbon composite was adopted to enhance the efficiency of anaerobic digestion by facilitating direct interspecies electron transfer (DIET). The preparation of iron-carbon composite was optimized and its effects on BTEX removal and methanogenic performance were then investigated. The results showed that the iron-carbon composite facilitated the hydrolysis and acidification process. The toluene removal rate was improved by 69.9 %, and the cumulative methane yield was enhanced by 90.5 % under the optimized condition of pyrolysis temperature of 600 °C, Fe/C mass ratio of 1.0 and dosage of 2.5 g/L. Furthermore, both extracellular electron transfer (EET) and intracellular electron transfer (IET) were found enhanced, and the aromatic compound-degrading bacteria was enriched by iron-carbon composite. The enhanced anaerobic degradation of BTEX by iron-carbon composite provided a novel means for the removal of BTEX from cabin-washing wastewater.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 374-383"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards characterizing LNAPLs and DNAPLs co-transport under groundwater table fluctuation conditions","authors":"Shengyu Wu ,&nbsp;Zhongran Wu ,&nbsp;Guofeng Li ,&nbsp;Yongkai Liao ,&nbsp;Shanna Lin ,&nbsp;Zhao Liu ,&nbsp;Chao Cai","doi":"10.1016/j.jes.2025.04.016","DOIUrl":"10.1016/j.jes.2025.04.016","url":null,"abstract":"<div><div>The transport behavior of pollutants under dynamic groundwater conditions has attracted significant attention recently. However, there is limited research on the simultaneous effects of groundwater table fluctuations on the transport of co-existing pollutants, especially combined dense and light non-aqueous phase liquids (DNAPLs and LNAPLs). In this study, column experiments investigated toluene and dichloromethane transport in a controlled water table system with varying fluctuation conditions. Results showed that both dichloromethane and toluene accumulated near the groundwater table under static water table conditions, but the concentration of dichloromethane declined more rapidly than toluene due to differences in their physicochemical properties, such as solubility, density, and hydrophobicity. Groundwater fluctuations facilitated pollutants transportation towards deeper layers, potentially resulting in unforeseen increases in pollutant volatilization and downward fluxes. The interactions between dichloromethane and toluene, including competitive adsorption, enhanced dissolution, and altered kinematic viscosities, resulted in the reduced transport potential of dichloromethane while enhancing that of toluene. Furthermore, compared to dichloromethane, the initial upward fluctuation of the water table had a more pronounced impact on toluene due to its lower solubility and volatility. The downward transport risk index assessment indicated that among various factors considered, groundwater fluctuation amplitude exerted the most significant influence on pollutant migration risk. These new findings will provide important insights into understanding and assessment of the potential transport risk associated with combined LNAPLs and DNAPLs in the natural environment.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 206-217"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Availability and desorption kinetics of correlative cadmium and manganese in soils from karst areas","authors":"Jia-Lu Gao ,&nbsp;Xing-Yue Li ,&nbsp;Chao Zhang ,&nbsp;Qiong Yang ,&nbsp;Jianyin Huang ,&nbsp;Dong-Xing Guan","doi":"10.1016/j.jes.2025.04.018","DOIUrl":"10.1016/j.jes.2025.04.018","url":null,"abstract":"<div><div>Cadmium (Cd) contamination in soils poses substantial environmental and health risks globally, with manganese (Mn) playing a crucial role in regulating Cd mobility through soil adsorption processes and shared crop uptake pathways. While the importance of understanding Cd-Mn dynamics in soils is widely recognized, quantitative assessments of their correlated desorption processes remain limited. This study employed diffusive gradients in thin-films (DGT) technique combined with DGT-induced fluxes in soils (DIFS) modeling to investigate Cd and Mn availability and desorption dynamics in karst soils from Guangxi, southwestern China. The soil solution concentrations ranged from 0.23–1.82 µg/L for Cd and 1.29–8.41 mg/L for Mn. DGT measurements demonstrated nonlinear accumulation patterns for both metals over 48 h duration. DIFS modeling yielded distribution coefficients (<em>K</em>_dl) ranging from 2.50 to 807 mL/g and response time (<em>T</em>_c) between 1.27 and 425 s for both metals. Solid phase resupply was limited by desorption rates of 5.38–229 × 10⁻⁵/s, providing unprecedented insight into the kinetics of metal release in these soils. Analysis of metal desorption rate ratios (<em>k</em>₋₁-Mn/<em>k</em>₋₁-Cd) indicated that soil organic matter content, clay content, pH, and metal contents collectively control Cd and Mn desorption kinetics, leading to distinct desorption patterns across soils with varying physicochemical properties. These findings demonstrate rapid equilibrium reestablishment and desorption-limited resupply characteristics of Cd and Mn in karst soils, advancing understanding of correlative metal behaviors in these unique geological settings.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 292-299"},"PeriodicalIF":6.3,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of a novel carbon microsphere with multi-cavity mesoporous structure for CO2 adsorption","authors":"Li Liu ,&nbsp;Qunyan Li ,&nbsp;Qi Wei ,&nbsp;Yan Mei ,&nbsp;Wenjuan Chen ,&nbsp;Zuoren Nie","doi":"10.1016/j.jes.2025.02.052","DOIUrl":"10.1016/j.jes.2025.02.052","url":null,"abstract":"<div><div>Porous carbon microspheres are widely regarded as a superior CO₂ adsorbent due to their exceptional efficiency and affordability. However, better adsorption performance is very attractive for porous carbon microspheres. And modification of the pore structure is one of the effective strategies. In this study, multi-cavity mesoporous carbon microspheres were successfully synthesized by the synergistic method of soft and hard templates, during which a phenolic resin with superior thermal stability was employed as the carbon precursor and a mixture of silica sol and F108 as the mesoporous template. Carbon microspheres with multi-cavity mesoporous structures were prepared, and all the samples showed highly even mesopores, with diameters around 12 nm. The diameter of these microspheres decreased from 396.8 nm to about 182.5 nm with the increase of silica sol. After CO₂ activation, these novel carbon microspheres (APCF_0.5-S_1.75) demonstrated high specific surface area (983.3 m²/g) and remarkable CO₂ uptake of 4.93 mmol/g at 0 °C and1 bar. This could be attributed to the unique multi-cavity structure, which offers uniform mesoporous pore channels, minimal CO₂ transport of and a greater number of active sites for CO₂ adsorption.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 199-209"},"PeriodicalIF":6.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antibiotics in northern China's largest shallow wetland lake: Occurrence, bioaccumulation, ecological risk, and indicator screening","authors":"Kai Deng ,&nbsp;Lining Zhao ,&nbsp;Meiyu Li ,&nbsp;Xueyou Liang ,&nbsp;Xiaobo Wang ,&nbsp;Jinze Han ,&nbsp;Yulong Zhang ,&nbsp;Ryoiti Kiyama ,&nbsp;Sijun Dong","doi":"10.1016/j.jes.2025.04.012","DOIUrl":"10.1016/j.jes.2025.04.012","url":null,"abstract":"<div><div>Antibiotics are widespread in aquatic environments due to their extensive use in human healthcare and animal husbandry. However, research on the occurrence and bioaccumulation of antibiotics in aquatic organisms within shallow wetland lakes remains limited. This study investigated the occurrence and bioaccumulation of ten commonly used antibiotics in the Baiyang Lake, northern China's largest shallow wetland lake. The results indicated that sulfonamides and fluoroquinolones were the predominant antibiotics in surface water, whereas fluoroquinolones and macrolides were more prevalent in sediment. Fluoroquinolones demonstrated significant potential for bioaccumulation in targeted aquatic organisms, including both animals and plants (<em>Carassius auratus</em> and <em>Phragmites australis</em>). The bioaccumulation of antibiotics in <em>Carassius auratus</em> was correlated with their solubility, whereas in <em>Phragmites australis</em>, this was associated with their octanol-water partition coefficients and molecular weights. Ecological risk assessment indicated that most antibiotics posed minimal to low risk levels. However, four antibiotics were exceptions: clarithromycin (12.5 %) and sulfamethoxazole (6.25 %) presented a high risk in surface water samples, while norfloxacin (25.0 %) and ciprofloxacin (25.0 %) posed a high risk in sediment samples. Norfloxacin, ciprofloxacin, and roxithromycin were identified as key indicator antibiotics for enhancing the local monitoring and control of antibiotic contamination based on four criteria: (1) high concentrations, (2) frequent detection, (3) capacity for bioaccumulation, and (4) ecological risk levels. This study contributes to a deeper understanding of the status of antibiotic contamination, bioaccumulation characteristics, and ecological risk in Baiyang Lake, thereby supporting efforts to monitor and regulate antibiotic pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 233-241"},"PeriodicalIF":6.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green manure plant and exogenous degrading bacteria synergistically promote atrazine removal by enriching indigenous rhizosphere degraders","authors":"Fangyu Hu ,&nbsp;Jing An ,&nbsp;Ao Su ,&nbsp;Baoyu Wang ,&nbsp;Ziming Ding ,&nbsp;Xiuxiu Yan ,&nbsp;Shuhe Wei ,&nbsp;Mingkai Xu ,&nbsp;Huiwen Zhang","doi":"10.1016/j.jes.2025.04.011","DOIUrl":"10.1016/j.jes.2025.04.011","url":null,"abstract":"<div><div>Atrazine, a persistent triazine herbicide, poses environmental and health risks. This study examines the synergistic remediation of atrazine-contaminated soil using green manure plant (GMP) hairy vetch (<em>Vicia villosa</em> Roth, VV) and the exogenous atrazine-degrading bacterium <em>Arthrobacter</em> sp. ATR1. Soil samples contaminated with atrazine at 5 and 20 mg/kg were treated with control (CK), ATR1 (CKatr), hairy vetch (VV), and combined hairy vetch and ATR1 remediation (VVatr). The results indicated that the VVatr treatment exhibited the most effective atrazine removal, achieving enhancements of 56.12 % at 5 mg/kg and 54.51 % at 20 mg/kg compared to CK after 28 days. Soil enzyme activities, including urease, sucrase, and alkaline phosphatase, were significantly elevated in the VV and VVatr treatments, contributing to improved soil quality. Additionally, the CKatr, VV, and VVatr treatments enhanced bacterial diversity and richness while altering the microbial community structure. The VV and VVatr treatments notably enriched indigenous atrazine-degrading bacteria and nitrogen-fixing bacteria in the rhizosphere. This microbial enrichment upregulated the Atrazine degradation and Nitrogen metabolism pathways, facilitating both atrazine removal and nitrogen cycling in the soil. And VVatr treatment promoted the stability of the microbial network and enhanced the cooperative relationship between key indigenous atrazine-degrading and nitrogen-fixing bacteria. These findings explain the mechanism of plant-microbe combined remediation of atrazine-contaminated soil from the perspective of rhizosphere microorganisms and offer a theoretical basis for the practical application of this method.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 694-704"},"PeriodicalIF":6.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co-exposure of PFASs, PAHs and metals, immune inflammation and triglyceride-glucose index: Exploring associations and mediation effects in children","authors":"Miao Liu ,&nbsp;Biao Zhang ,&nbsp;Yuanyuan Zhang ,&nbsp;Jie Wang ,&nbsp;Lei Zhao ,&nbsp;Wenting Guo ,&nbsp;Meng Li ,&nbsp;Huihua Yang ,&nbsp;Xuefeng Lai ,&nbsp;Liangle Yang ,&nbsp;Xiao Meng ,&nbsp;Cuijuan Wang ,&nbsp;Zhihu Zhang ,&nbsp;Xiaomin Zhang","doi":"10.1016/j.jes.2025.04.006","DOIUrl":"10.1016/j.jes.2025.04.006","url":null,"abstract":"<div><div>The associations of co-exposure to per- and polyfluoroalkyl substances (PFAS), polycyclic aromatic hydrocarbons (PAHs), and metals with children's glycometabolism and the underlying mechanism of immune inflammation are largely unclear. We conducted a longitudinal panel study to explore the effects of individual and mixture of 27 contaminants on an emerging surrogate indicator of insulin resistance, triglyceride-glucose index (TyG), and the mediation of immunoglobulins and cytokines in children aged 4–6 years and 11–13 years. The results showed robust associations of perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluoroundecanoic acid (PFUnDA), and arsenic (As) with elevated TyG. The interaction of PFNA with PFOA was significant, showing a synergistic effect on TyG. And combined association of each pair of PFOA, PFNA, and As with TyG were enhanced. Meanwhile, the effect of contaminants mixture on TyG was significant for polyfluoroalkyl substances (PFAS) mixture, of which 6:2 Chlorinated polyfluorinated ether sulfonates (Cl-PFESA), PFNA, and PFUnDA weighted more than others. Notably, contaminants were related to immune globulins and cytokines, of which chemokine ligand (CCL) 4, interleukin (IL)-1β, IL-9, and tumor necrosis factor (TNF)-α significantly mediated associations of PFOA, PFNA, and PFUnDA with TyG. Accordingly, PFAS and metals were individually and jointly associated with TyG elevation, with 6:2 Cl-PFESA, PFNA, and PFUnDA contributing the most, and CCL4, IL-1β, IL-9, and TNF-α might be the underlying mediators in children.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 384-393"},"PeriodicalIF":6.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of temperature on the biogenic volatile organic compound (BVOC) emissions in China: A review","authors":"Yiming Yang ,&nbsp;Fengbin Sun ,&nbsp;Yusheng Chen ,&nbsp;Shiyue Yang ,&nbsp;Yuan Dai ,&nbsp;Yiming Qin ,&nbsp;Ning Zhang ,&nbsp;Zhifeng Shu ,&nbsp;Han Yan ,&nbsp;Xinlei Ge ,&nbsp;Junfeng Wang","doi":"10.1016/j.jes.2025.03.054","DOIUrl":"10.1016/j.jes.2025.03.054","url":null,"abstract":"<div><div>Temperature has a substantial impact on the emission of biogenic volatile organic compounds (BVOCs). Moderate warm temperatures, e.g., 30–40 °C, could boost plant metabolism, increasing BVOC emissions. Against the backdrop of global warming, plants emit more BVOCs to cope with thermal stress, leading to elevated concentrations of tropospheric ozone (O₃) and secondary organic aerosols (SOA). In recent years, a considerable body of research has explored the interaction between tree species and BVOCs under the influence of various environmental factors. Although many studies have examined explored the temperature dependence of BVOC emissions in the past, few studies have conducted a comprehensive and in-depth investigation into the impacts of temperature. This review summarizes the relevant studies on BVOCs in the past decade, including the main biosynthetic pathways, emission observation techniques and emission inventories, as well as how temperature affects isoprene and monoterpene emission rates and the formation of O₃ and SOA. Our work offers a theoretical foundation and guidance for future efforts to advance the comprehension of BVOC emission characteristics and develop strategies to mitigate secondary pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 649-660"},"PeriodicalIF":6.3,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unveiling the fluid dynamics and mass transfer processes in a spatially confined flow-through electrochemical reactor","authors":"Yunqing Zhu ,&nbsp;Yirong Hao ,&nbsp;Tian Wang ,&nbsp;Fan Pan ,&nbsp;Hongtao Yu ,&nbsp;Junfeng Niu","doi":"10.1016/j.jes.2025.03.072","DOIUrl":"10.1016/j.jes.2025.03.072","url":null,"abstract":"<div><div>Electrocatalytic oxidation is a promising technology for wastewater treatment, but poor mass transfer and low current efficiency impaded its engineering applications. To address these issues, researchers have developed flow-through electrochemical reactors (FERs) primarily based on porous electrodes, where the pore structure significantly impacts the electrochemical reaction. Therefore, this study systematically investigated the impact of different pore sizes on the fluid dynamics, current potential distribution, mass transfer processes, and degradation performance of FERs. Computational Fluid Dynamics (CFD) results indicated that smaller pore sizes (10 μm, 30 μm, and 60 μm) significantly enhanced convective effects within the fluid, reduced short fluid paths and dead volume regions within the microchannels, and facilitated mass transfer processes. Additionally, smaller pore sizes were conducive to a uniform distribution of current density. Furthermore, Fe(CN)₆⁴⁻ oxidation experiments revealed that the current density at a pore size of 160 μm was notably lower than that at 10 μm, indicating slower mass transfer of Fe(CN)₆⁴⁻ within larger channels. Calculations based on experimental results demonstrated that the mass transfer rate at a pore size of 10 μm was six times than that at 160 μm, further confirming the enhancing effect of smaller pore sizes on the mass transfer process. Lastly, experiments on tetracycline degradation showed that at a residence time of 90 s, the removal efficiencies of tetracycline were 80 % and 39.1 % for porous electrodes with pore sizes of 10 μm and 160 μm, respectively, demonstrating the superior removal efficiency of smaller pore sizes for tetracycline degradation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"160 ","pages":"Pages 528-536"},"PeriodicalIF":6.3,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}