Journal of Environmental Sciences-china最新文献_第3页

Effects of soil labile carbon fractions and microbes on GHG emissions from flooding to drying in paddy fields 土壤活性碳组分和微生物对水田水淹至干枯过程温室气体排放的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-11 DOI: 10.1016/j.jes.2025.03.016

Yi Xiao , Rong Huang , Zongjin Zhang , Vanessa N.L. Wong , Xingyu Li , Xiaoyan Tang , Youlin Luo , Yingjie Wu , Jiang Liu , Shiwei Li , Changquan Wang , Bing Li

{"title":"Effects of soil labile carbon fractions and microbes on GHG emissions from flooding to drying in paddy fields","authors":"Yi Xiao , Rong Huang , Zongjin Zhang , Vanessa N.L. Wong , Xingyu Li , Xiaoyan Tang , Youlin Luo , Yingjie Wu , Jiang Liu , Shiwei Li , Changquan Wang , Bing Li","doi":"10.1016/j.jes.2025.03.016","DOIUrl":"10.1016/j.jes.2025.03.016","url":null,"abstract":"<div><div>Soil microorganisms and labile soil organic carbon (SOC) fractions are essential factors affecting greenhouse gas (GHG) emissions in paddy fields. However, the effects of labile SOC fractions and microorganisms on GHG emissions from flooding to drying after organic fertilizer replacing for chemical fertilizer remain unclear. Here, a long-term experiment was conducted with four treatments: chemical fertilization only (control), organic fertilizer substituting 25 % of chemical N fertilizer (NM1), 50 % of chemical N fertilizer (NM2), and NM2 combined with crop straw (NMS). GHG emissions were monitored, and soil samples were collected to determine labile SOC fractions and microorganisms. Results revealed the GHG emissions in the NM2 significantly increased by 196.88 % from flooding to drying, mainly due to the higher CO<sub>2</sub> emissions. The GHG emissions per kg of C input in NMS was the lowest with the value of 9.17. From flooding to drying, organic fertilizer application significantly increased the readily oxidizable organic carbon (ROC) contents and C lability; the NM2 and NMS dramatically increased the SOC and non-readily oxidizable organic carbon (NROC). The bacterial communities showed significant differences among different treatments in the flooding, while the significant difference was only found between the NMS and other treatments in the drying. From flooding to drying, changing soil moisture conditions causes C fractions and microbial communities to jointly affect carbon emissions, and the NMS promoted carbon sequestration and mitigated GHG emissions. Our findings highlight the importance of the labile SOC fractions and microorganisms linked to GHG emissions in paddy fields.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 420-434"},"PeriodicalIF":5.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144514118","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}

引用次数: 0

Unraveling multiple effects of environmental factors on nutrient release: Towards optimal conditions in agricultural drainage ditches 揭示环境因素对养分释放的多重影响：探讨农业排水沟的最佳条件

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-11 DOI: 10.1016/j.jes.2025.03.017

Yang Gao , Peifang Wang , Bin Hu , Jin Qian , Qiutong Jin , Qiang Li

{"title":"Unraveling multiple effects of environmental factors on nutrient release: Towards optimal conditions in agricultural drainage ditches","authors":"Yang Gao , Peifang Wang , Bin Hu , Jin Qian , Qiutong Jin , Qiang Li","doi":"10.1016/j.jes.2025.03.017","DOIUrl":"10.1016/j.jes.2025.03.017","url":null,"abstract":"<div><div>Agricultural drainage ditches (ADDs) are widespread and serve as critical zones, playing a vital role in mitigating non-point source nitrogen (N) and phosphorus (P) pollution in farmland. However, limited information is known about the interaction relationship between multiple factors and nutrient release in multistage ADDs. Here, a comprehensive five-level agricultural drainage system (comprising field, sublateral, head, branch, and trunk ditches) was selected as the study model. We developed a simulation setup and applied the Box–Behnken Design (BBD) model to systematically examine the influence of various environmental factors on nutrient release dynamics. The results demonstrated that the developed regression model (<em>p</em> < 0.0001) reliably predicted total nitrogen (TN) and total phosphorus (TP) concentrations in multistage ADDs. Based on the response surface plots and contour lines, optimal release conditions for nutrients in multistage ADDs (5 days, 296 K, 1.03 mg/L N, 0.10 mg/L P) were determined through multi-objective optimization. We found that nutrient application exerted the most substantial influence on the release conditions. As field water was discharged into the ditches, the nutrient levels were decreased progressively. Overall, the N and P release processes in multistage ADDs were jointly influenced by environmental factors and ditch scale. These findings offer a solid theory for studying nutrient release and deposition in multistage ADDs, providing key insights for managing farmland ditches to reduce agricultural pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 542-554"},"PeriodicalIF":5.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579546","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}

引用次数: 0

Differential photosynthetic and metabolic susceptibility of Microcystis aeruginosa and Raphidocelis subcapitata to environmentally relevant levels of Diuron 铜绿微囊藻和小头Raphidocelis对环境相关浓度的Diuron的光合和代谢敏感性差异

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-11 DOI: 10.1016/j.jes.2025.03.012

Zichao Gong , Jun Sha , Yunlu Jia , Jin Ma , Licheng Huang , Guofei Dai , Lirong Song

{"title":"Differential photosynthetic and metabolic susceptibility of Microcystis aeruginosa and Raphidocelis subcapitata to environmentally relevant levels of Diuron","authors":"Zichao Gong , Jun Sha , Yunlu Jia , Jin Ma , Licheng Huang , Guofei Dai , Lirong Song","doi":"10.1016/j.jes.2025.03.012","DOIUrl":"10.1016/j.jes.2025.03.012","url":null,"abstract":"<div><div>The sensitivity of phytoplankton growth to chemical stressors influences the composition and function of phytoplankton communities. In this study, we compared the growth, photosynthetic, and metabolic responses of the cyanobacterium <em>Microcystis aeruginosa</em> FACHB-469 and the green alga <em>Raphidocelis subcapitata</em> FACHB-271 to herbicide diuron. The 5-day growth inhibition test showed the <em>M. aeruginosa</em> FACHB-469 is more sensitive to diuron. Meanwhile, the photosynthetic performance, quantum yield and efficiencies, and structural indicators of the photosynthetic apparatus were influenced by environmentally relevant levels of diuron differently between the two phytoplankton. These photosynthetic alterations were more significant in the <em>M. aeruginosa</em> FACHB-469 than in the <em>R. subcapitata</em> FACHB-271 under the three levels of diuron (5, 10, and 20 µg/L). Cellular metabolism of the two phytoplankton was considerably disturbed after diuron exposure. The metabolism of amino acids, such as L-arginine, L-homoserine, and N-Acetyl-L-alanine, was significantly altered in the <em>R. subcapitata</em> FACHB-271, while only L-valine level was significantly altered in the <em>M. aeruginosa</em> FACHB-469. The levels of allantoic acid, epicatechin, and taurine were significantly downregulated in the <em>R. subcapitata</em> FACHB-271, while pyrimidine metabolism and γ-linolenic acid metabolism were altered in the <em>M. aeruginosa</em> FACHB-469. Overall, distinct responses in photosynthetic physiology and cellular metabolism are suggestive of invisible differences under environmentally relevant level of diuron, contributing to the differences in sensitivity of growth between the two phytoplankton under diuron.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 895-906"},"PeriodicalIF":5.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633574","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}

引用次数: 0

Tire particles of different sizes induce a proinflammatory response of varying intensity in lung cells 不同大小的轮胎颗粒在肺细胞中诱导不同强度的促炎反应

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-10 DOI: 10.1016/j.jes.2025.03.011

Abderrahmane Bouredji , Bogdan Muresan-Paslaru , Riadh Lakhmi , Raphaël Passas , Jérémie Pourchez , Valérie Forest

{"title":"Tire particles of different sizes induce a proinflammatory response of varying intensity in lung cells","authors":"Abderrahmane Bouredji , Bogdan Muresan-Paslaru , Riadh Lakhmi , Raphaël Passas , Jérémie Pourchez , Valérie Forest","doi":"10.1016/j.jes.2025.03.011","DOIUrl":"10.1016/j.jes.2025.03.011","url":null,"abstract":"<div><div>Pollution from road traffic contributes significantly to air pollution through pollutants from exhaust emissions (gases and particles) and non-exhaust emissions (tire wear particles, brake wear particles and the resuspension of road dust). This research examined the hazard of tire particles (TP) and in particular evaluated the effect of TP size on lung macrophages. TP were obtained by cryogenic grinding of a tire and subsequent sieving to obtain four groups of particles (TP70, TP30, TP15, TP5) of different sizes with average diameters of 107 µm, 55 µm, 22 µm, and 6 µm, respectively. A complete physicochemical characterization was performed to determine the size distribution, chemical composition and morphology of these particles. We then investigated the proinflammatory response, oxidative stress and cytotoxicity induced in RAW264.7 cells exposed to four different TP concentrations for 24 h. TP had no direct effect on cytotoxicity, nor did they increase reactive oxygen species (ROS) production in the cells. However, TP induced a significant and size-dependent proinflammatory effect, which was particularly pronounced with small particles. Moreover, this effect was concentration-dependent.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 586-597"},"PeriodicalIF":5.9,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597364","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}

引用次数: 0

Wetland types shape microbial function related to soil phosphorus cycling based on metagenomics analysis 基于宏基因组学分析的湿地类型塑造与土壤磷循环相关的微生物功能

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-10 DOI: 10.1016/j.jes.2025.03.009

Meiqing Jia , Zhiwei Gao , Xuefeng Hu , Mengqiong Feng , Fanhui Liu , Jing Huang , Ruwen Zhang , Jing Li , Guogang Zhang , Yidong Wang

{"title":"Wetland types shape microbial function related to soil phosphorus cycling based on metagenomics analysis","authors":"Meiqing Jia , Zhiwei Gao , Xuefeng Hu , Mengqiong Feng , Fanhui Liu , Jing Huang , Ruwen Zhang , Jing Li , Guogang Zhang , Yidong Wang","doi":"10.1016/j.jes.2025.03.009","DOIUrl":"10.1016/j.jes.2025.03.009","url":null,"abstract":"<div><div>Limitations regarding phosphorus (P) are widespread in ecosystems. Understanding the impacts of the wetland types on microbially mediated soil P availability and cycling is essential for the effective management of wetlands. In this study, the Beidagang wetland, Baodi paddy field, and Dahuangpu wetland in Tianjin, China were chosen as representatives of the coastal wetland (B), constructed wetland (R), and swampy wetland (W), respectively. Sequential P extraction and metagenomics approaches were adopted to explore the soil P fraction and microbially regulated P cycle. Proteobacteria were the predominant microbes-related soil P cycle. <em>IMPA, gph, rsbU_P, ugpQ</em>, and <em>glpK</em> genes were dominant in organic P (Po) mineralization, while <em>gcd, ppa</em>, and <em>ppx</em> genes were dominant in inorganic P (Pi) solubilization. The salinity, NO<sub>3</sub><sup>-</sup>-N concentration, the ratio of total carbon to total nitrogen (TC/TN), total carbon (TC), and the ratio of soil organic carbon to total P (SOC/TP) were the co-drivers of microbially mediated P cycle processes. Microbial network complexity-relate P cycle was the lowest in the coastal wetland. Salinity and NO<sub>3</sub><sup>-</sup>-N exhibited a significant negative relation to the abundance of most genes-relate Pi solubilization and a remarkable positive correlation with the abundance of many genes-relate Po mineralization. These findings demonstrated that Po mineralization tended to occur in habitats with high salinity and nutrient imbalances, whereas the dissolution of Pi was prone to occur in low-salinity environments with relatively balanced soil nutrients. This study improves understanding of how salinity and soil nutrients jointly shape microbial-regulated soil P cycle in different types of wetlands.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 930-943"},"PeriodicalIF":5.9,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655082","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}

引用次数: 0

Variations of source and aerosol composition over ten years: Implications for Clean Air Action Plan in a rapidly developing megacity 十年来来源和气溶胶成分的变化：对快速发展的特大城市清洁空气行动计划的启示

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-10 DOI: 10.1016/j.jes.2025.03.010

Yanqi Huangfu , Yingze Tian , Yuting Wei , Han Xu , Danlin Song , Fengxia Huang , Yinchang Feng

{"title":"Variations of source and aerosol composition over ten years: Implications for Clean Air Action Plan in a rapidly developing megacity","authors":"Yanqi Huangfu , Yingze Tian , Yuting Wei , Han Xu , Danlin Song , Fengxia Huang , Yinchang Feng","doi":"10.1016/j.jes.2025.03.010","DOIUrl":"10.1016/j.jes.2025.03.010","url":null,"abstract":"<div><div>A long-term (2007–2016) particulate matter dataset measured at multiple sites in Chengdu, an expanding megacity in southwest China, was analyzed. The trends of particulate chemical compositions and source apportionment were used to evaluate and review the effectiveness of source-specific control policies and measures in Atmospheric Pollution Prevention and Control Action Plan (APPCAP). The concentration of particulate matter decreased significantly, and most aerosol components changed synchronously with particulate matter. The results of advanced three-way factor analysis model suggested that six sources were resolved at three sites: coal combustion, vehicle, crustal dust, cement, sulfate, nitrate and secondary organic matter. Secondary source, including secondary organic carbon (SOC), sulfate, nitrate, and ammonium (SNA), was always the main pollution source in this region. Dust, including cement and crustal dust, was important primary source. Encouragingly, coal combustion had been significantly controlled after APPCAP. The central site represented the higher contribution of vehicles, nitrates and SOC, while north and eastern sites showed the higher contribution of sulfate, coal combustion and dust. Many evidence points to substantial alterations in the physicochemical attributes of Chengdu's atmosphere. The rising proportion of nitrate and the transition of the atmospheric environment from ammonia-poor to ammonia-rich conditions highlight the necessity for the next phase of particulate matter control to focus intensively on the management of NH₃ and NO<em><sub>x</sub></em>. China's APPCAP could provide useful experience for vast developing countries and other urbanizing and industrializing regions to strike a balance between social development and environmental protection.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 633-643"},"PeriodicalIF":5.9,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597363","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}

引用次数: 0

Silicon-mediated metal uptake dynamics in Sesuvium portulacastrum: Unveiling mechanisms for enhanced phytoremediation in coastal wetlands 滨海湿地中硅介导的金属吸收动力学：揭示增强植物修复的机制

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-09 DOI: 10.1016/j.jes.2025.03.008

Guogan Peng , Zhen Zhang , Jingzhen Wang , Ke Pan

{"title":"Silicon-mediated metal uptake dynamics in Sesuvium portulacastrum: Unveiling mechanisms for enhanced phytoremediation in coastal wetlands","authors":"Guogan Peng , Zhen Zhang , Jingzhen Wang , Ke Pan","doi":"10.1016/j.jes.2025.03.008","DOIUrl":"10.1016/j.jes.2025.03.008","url":null,"abstract":"<div><div>Coastal wetlands face dual pressures from high salinity and heavy metal pollution, presenting significant ecological challenges. Halophytes like <em>Sesuvium portulacastrum</em> possess unique physiological mechanisms to mitigate metal toxicity. This study investigates how silicon (Si) availability influences the accumulation of copper (Cu) and cadmium (Cd) in <em>S. portulacastrum</em>. Our results show that Si supplementation at environmentally relevant levels significantly increases Cu and Cd concentrations in the roots, while simultaneously reducing the root-to-shoot translocation of these metals. <em>In situ</em> non-invasive micro-testing revealed decreased metal efflux from the xylem, indicating an enhanced retention of metals in the roots. Furthermore, analyses using X-ray photoelectron spectroscopy and atomic force microscopy demonstrated a higher density of oxygen-containing functional groups and SiO<sup>−</sup> on the extracellular matrix of Si-enriched roots. This structural transformation resulted in a significant reduction in root surface potential, facilitating greater metal ion attraction and uptake. The findings from this study provide critical insights into the mechanisms by which Si availability regulates metal accumulation in halophytes, suggesting potential strategies for mitigating metal pollution in coastal wetland ecosystems.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 831-840"},"PeriodicalIF":5.9,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614341","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}

引用次数: 0

Polychlorinated biphenyls-153 induces fat accumulation and lifespan shortening through CYP450 family genes in Caenorhabditis elegans 多氯联苯-153通过CYP450家族基因诱导秀丽隐杆线虫脂肪积累和寿命缩短

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-09 DOI: 10.1016/j.jes.2025.03.006

Zhi Qu , Panpan Wang , Yalu Wang , Peisen Guo , Guimiao Lin , Peixi Wang , Zengli Yu , Nan Liu

{"title":"Polychlorinated biphenyls-153 induces fat accumulation and lifespan shortening through CYP450 family genes in Caenorhabditis elegans","authors":"Zhi Qu , Panpan Wang , Yalu Wang , Peisen Guo , Guimiao Lin , Peixi Wang , Zengli Yu , Nan Liu","doi":"10.1016/j.jes.2025.03.006","DOIUrl":"10.1016/j.jes.2025.03.006","url":null,"abstract":"<div><div>A class of persistent organic pollutants, polychlorinated biphenyls (PCBs), are ubiquitous in the environment and human tissues which are continuously and long-term threatened. We aim to investigate the toxic effects and the underlying mechanisms of PCB153 using <em>Caenorhabditis elegans</em> as a model organism. Our findings demonstrated that exposure to an optimized concentration of 2 µmol/L PCB153 had adverse effects on <em>C. elegans</em>, led to reduction of lifespan, body length, frequency of body bending, and head wiggling. Additionally, this exposure led to an increase in the accumulation of reactive oxygen species, superoxide dismutase, lipofuscin and fat content within the organism. Furthermore, gene set enrichment analysis and whole transcriptome sequencing revealed, a significant up-regulation of Cytochrome P450 (CYP) family genes, which are crucial for the xenobiotics metabolism in <em>C. elegans</em>. Knocking down specific genes within the CYPs family, including <em>cyp-35C1, cyp-35A5, cyp-35A3, cyp-34A1</em>, and <em>cyp-34A10</em>, via RNA interference were able to reverse the shortening of lifespan and fat accumulation induced by PCB153 exposure. Moreover, a comprehensive a competing endogenous RNA network was constructed by integrating qPCR-validated differentially expressed mRNA along with lncRNA, circRNA, and miRNA identified by transcriptomic sequencing. This study emphasizes that PCB153 exposure leads to the physiological impairments, particularly fat accumulation and a shorter lifespan, through the modulation of CYP450 family genes. These findings contribute to our understanding of environmental pollutants and their impact on biological systems and provide valuable information on the toxic effects and potential risks associated with PCB153 exposure.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 72-83"},"PeriodicalIF":5.9,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230859","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}

引用次数: 0

Impact of citric acid on cadmium immobilization in soil amended with biochar 柠檬酸对生物炭改性土壤中镉固定化的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-08 DOI: 10.1016/j.jes.2025.03.005

Gang Wu , Md. Shoffikul Islam , Qingling Fu , Yonghong Liu , Jun Zhu , Linchuan Fang , Hongqing Hu

{"title":"Impact of citric acid on cadmium immobilization in soil amended with biochar","authors":"Gang Wu , Md. Shoffikul Islam , Qingling Fu , Yonghong Liu , Jun Zhu , Linchuan Fang , Hongqing Hu","doi":"10.1016/j.jes.2025.03.005","DOIUrl":"10.1016/j.jes.2025.03.005","url":null,"abstract":"<div><div>Cadmium (Cd) contamination in agricultural soils poses severe threats to human health and ecosystem integrity. While biochar is recognized for its ability to immobilize heavy metals, the impact of plant-derived low molecular weight organic acids (LMWOAs), such as citric acid (CA), on this process remains unclear. This study shows that CA and biochar synergistically immobilize Cd in alkaline soil from extensively polluted southeastern Hubei, China. Soils were amended with maize stover biochar at rates of 0, 0.5 %, 1 %, and 2 % (<em>W</em>/<em>W</em>), with or without CA addition (1 mmol/L), and incubated for 80 days. Results show that biochar significantly reduced bioavailable Cd, with a 2 % application decreasing extractable Cd by 26.84 %. Unexpectedly, CA alone increased Cd mobility by 9.38 %; however, when combined with high-dose biochar, CA and biochar synergistically enhanced Cd immobilization, reducing bioavailable Cd by 27.40 %. Advanced analytical techniques, including BCR sequential extraction, X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy with energy-dispersive X-ray spectroscopy, confirmed that the interaction between biochar and CA altered Cd speciation, promoting its stabilization. This study is the first to show that CA and biochar synergistically immobilize Cd in alkaline soils, disproving the idea that LMWOAs hinder biochar's metal remediation. Our findings show that biochar can prevent or even harness LMWOAs' activating effects on Cd, indicating its great potential for sustainable Cd remediation in alkaline soils. This study improves our understanding of biochar-soil interactions in organic acids and gives new scientific bases for enhancing heavy metal-contaminated soil remediation procedures.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 324-336"},"PeriodicalIF":5.9,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144490878","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}

引用次数: 0

Probabilistic ecological risk characterizing and source-specific risk apportionment of antibiotics in rivers in the sub-center of Beijing, China 北京副中心地区河流抗生素的概率生态风险特征及源特异性风险分配

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-03-08 DOI: 10.1016/j.jes.2025.03.004

Cong Men , Yuting Ma , Haoquan Jiang , Haoxiang Tao , Zifu Li , Jiane Zuo

{"title":"Probabilistic ecological risk characterizing and source-specific risk apportionment of antibiotics in rivers in the sub-center of Beijing, China","authors":"Cong Men , Yuting Ma , Haoquan Jiang , Haoxiang Tao , Zifu Li , Jiane Zuo","doi":"10.1016/j.jes.2025.03.004","DOIUrl":"10.1016/j.jes.2025.03.004","url":null,"abstract":"<div><div>The widespread occurrence of antibiotics in urban rivers has raised global concerns for ecological security. Quantitative source-specific risk apportionment of antibiotics is crucial for targeted and effective ecological risk management, but is rarely studied. In this study, a source-specific ecological risk apportionment model for antibiotics was developed by combining the ecological risk quotient (RQ) method and the positive matrix factorization (PMF) model. Based on twenty-two antibiotics in sixty-five water samples from thirteen sites in Beijing in wet and dry seasons, the spatial variation and probabilistic distribution of ecological risk associated with antibiotics were analyzed, and source-specific ecological risk was evaluated. Results showed that for the sum of all antibiotics, the mean concentration of all samples was 671.48 ng/L, and the lower limit of the 90 % confidence interval of RQs was more than ten times the threshold for the high-risk level. The main sources were identified as domestic sewage, pharmaceutical wastewater and livestock discharge. It should be noted that higher contributions to antibiotic concentrations from sources do not always result in higher levels of ecological risk. Domestic sewage and livestock discharge contributed roughly equivalent amounts (36.17 % and 37.59 %, respectively) to antibiotic concentrations. However, domestic sewage was the most dominant source for risk (63.30 %), and livestock discharge only contributed 7.37 % to risk. The study found that evaluating the source-specific ecological risk associated with antibiotics is essential in addition to identifying their sources. The source-specific ecological risk apportionment model developed in this study is also referential for related studies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"158 ","pages":"Pages 694-709"},"PeriodicalIF":5.9,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604905","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}

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