Environmental Geochemistry and Health最新文献

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Pollution and health risk assessment of potentially toxic elements in soil-crop systems near a pyrite mining area, China. 黄铁矿矿区土壤-作物系统中潜在有毒元素的污染与健康风险评价。
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-22 DOI: 10.1007/s10653-025-02721-4
Xiaomeng Cheng, Chen Zhao, Daoming Zeng, Chao Wu, Ling He, Binbin Sun
{"title":"Pollution and health risk assessment of potentially toxic elements in soil-crop systems near a pyrite mining area, China.","authors":"Xiaomeng Cheng, Chen Zhao, Daoming Zeng, Chao Wu, Ling He, Binbin Sun","doi":"10.1007/s10653-025-02721-4","DOIUrl":"10.1007/s10653-025-02721-4","url":null,"abstract":"<p><p>Mining activities have increasingly contributed to soil contamination by potentially toxic elements (PTEs), which pose significant environmental and health risks, especially in historically under-regulated regions. This study investigated PTE contamination and associated risks in Longyou, a typical pyrite mining area in southeastern China. A total of 42 site-matched soil and crop samples were collected for the analysis of PTE total content and chemical fractions. The pollution levels and potential risks were assessed using the geo-accumulation index (I<sub>geo</sub>), enrichment factor (EF), ecological risk index (RI), risk assessment code (RAC), and health risk models. The results revealed significant enrichment of Cd, Cu, Pb, and Zn in the soils, primarily due to sulfide mineral weathering and historical mining activities. Cd was identified as the predominant pollutant, with content of up to 46% in the bioavailable fraction, indicating its high mobility and potential for uptake by crops. Notably, 28.5% of rice samples exceeded the national safety limits for Cd, highlighting a critical dietary exposure pathway. The ecological risk assessments classified the risk from Cd as moderate to high. The health risk assessment showed that both the hazard index (THI) values (4.49 for adults and 10.40 for children) and carcinogenic risk (TCR) values (0.0025 for adults and 0.0014 for children) exceeded the acceptable thresholds, with children facing significantly higher risks than adults. Cd and As were the main contributors to both non-carcinogenic and carcinogenic risks, with rice consumption identified as the primary exposure pathway. These findings underscore the necessity of targeted risk mitigation and sustained monitoring to minimize long-term environmental and human health impacts in mining-affected regions.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"406"},"PeriodicalIF":3.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Plastic debris in bird nests: sources, ecological impacts, and bioindicator potential for monitoring microplastic pollution. 鸟巢中的塑料碎片:来源、生态影响和监测微塑料污染的生物指标潜力。
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-22 DOI: 10.1007/s10653-025-02688-2
D Nguyen, Minh-Ky Nguyen, Minh-Thuan Pham, D Duc La, S Woong Chang, Sung Su Kim, D Duc Nguyen
{"title":"Plastic debris in bird nests: sources, ecological impacts, and bioindicator potential for monitoring microplastic pollution.","authors":"D Nguyen, Minh-Ky Nguyen, Minh-Thuan Pham, D Duc La, S Woong Chang, Sung Su Kim, D Duc Nguyen","doi":"10.1007/s10653-025-02688-2","DOIUrl":"10.1007/s10653-025-02688-2","url":null,"abstract":"<p><p>Plastic pollution is a growing global environmental challenge, with human-generated debris increasingly used as nesting material by birds. This highlights the widespread impact of human activity on ecosystems. Plastics in nests fragment into mesoplastics and microplastics, posing risks to organisms and ecosystems. Predominantly, polypropylene (PP) and polyethylene (PE) appear as fibers, fragments, and strings. Birds are affected by plastic contamination through entanglement, ingestion, and exposure to toxic pollutants, including harmful additives. As bioindicators, birds reveal the extent of plastic pollution and associated ecological risks. Addressing this issue requires ongoing research on microplastic distribution in seabird nests, improved waste management, and monitoring in polluted regions. Social media can also aid efforts to map hotspots and raise awareness about plastic contamination in estuarine and coastal ecosystems.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"405"},"PeriodicalIF":3.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Adsorption characteristics and mechanism of modified chicken manure biochar on Cd(II)-Pb(II) compound polluted wastewater. 改性鸡粪生物炭对Cd(II)-Pb(II)复合污染废水的吸附特性及机理
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-22 DOI: 10.1007/s10653-025-02714-3
Hua Qiao, Xin Liu, Yanjun Qian, Weiqiang Guo, Shuhao Zhang, Longhui Zhu
{"title":"Adsorption characteristics and mechanism of modified chicken manure biochar on Cd(II)-Pb(II) compound polluted wastewater.","authors":"Hua Qiao, Xin Liu, Yanjun Qian, Weiqiang Guo, Shuhao Zhang, Longhui Zhu","doi":"10.1007/s10653-025-02714-3","DOIUrl":"10.1007/s10653-025-02714-3","url":null,"abstract":"<p><p>Biochar has been widely employed in heavy metal wastewater treatment due to its well-developed porosity. However, current studies lack efficient and environmentally friendly modification methods, especially for systems involving coexisting heavy metals. In this study, modified biochar was prepared from chicken manure via K<sub>2</sub>FeO<sub>4</sub> modification, aiming to remove Cd(II)-Pb(II) compound polluted wastewater efficiently. Characterization results indicated that K<sub>2</sub>FeO<sub>4</sub> treatment significantly increased the specific surface area (67.1 m<sup>2</sup>/g) and pore volume (0.08 cm<sup>3</sup>/g) of KFBC, and enriched its surface with oxygen-containing functional groups. The adsorption kinetics of Cd(II) and Pb(II) followed the pseudo-second-order model, while the isotherm data fit well with the Langmuir model. The maximum adsorption capacities were 141.24 mg/g for Cd(II) and 487.45 mg/g for Pb(II), considerably higher than those of the unmodified biochar. In both single and binary systems, the adsorption capacities increased with dosage, and the optimal adsorption occurred at pH 5-6. In the binary system, KFBC exhibited a strong preference for Pb(II), with a selectivity coefficient 4038 times that of Cd(II). After three adsorption-desorption cycles, KFBC retained adsorption capacities of 45.28 mg/g for Cd(II) and 171.09 mg/g for Pb(II). In real wastewater, KFBC achieved removal efficiencies of 84.62% for Cd(II) and 97.85% for Pb(II), while maintaining strong resistance to ionic interference. The removal mechanisms involved cation exchange, precipitation, complexation, electrostatic attraction, and cation-π interactions. This study not only proposes a high-performance adsorbent derived from chicken manure but also reveals its selective adsorption and anti-interference capability in binary systems, demonstrating promising environmental and practical application potential.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"407"},"PeriodicalIF":3.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Enzymatic responses of fish (Ctenopharyngodon idella) exposed to lethal concentrations of selected trace metals. 鱼暴露于致死浓度的选定微量金属的酶反应。
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-22 DOI: 10.1007/s10653-025-02718-z
Nazish Shah, Muhammad Khisroon, Said Sajjad Ali Shah, Abdur Rahim
{"title":"Enzymatic responses of fish (Ctenopharyngodon idella) exposed to lethal concentrations of selected trace metals.","authors":"Nazish Shah, Muhammad Khisroon, Said Sajjad Ali Shah, Abdur Rahim","doi":"10.1007/s10653-025-02718-z","DOIUrl":"10.1007/s10653-025-02718-z","url":null,"abstract":"<p><p>Six sampled tissues were selected to measure their respective enzyme activities through spectrophotometric method. Drastic changes were observed in the enzyme activities of fish under the influence of LC15, LC50 and LC85 copper, chromium and lead administered metals respectively. Significant decrease (p < 0.05) in acetylcholine esterase activity was noted in the metals stressed brain tissue for each of the exposure concentrations as compared to the reference group, whereas among the anti-oxidant enzymes, catalase (CAT) level in stressed liver tissue had a significant increase (p < 0.05) against the respective exposure concentrations. Unlike CAT enzyme level, superoxide dismutase (SOD) in muscle tissue, dropped significantly to nearly negligible level as compared to control group where SOD activity was of maximum level. Since, the levels of enzyme activity effected by the three metals in the entire experimentation were found in a decreasing order of chromium > copper > lead, consequently a prominent level (p < 0.05) of SOD was confirmed at the heaviest exposure concentration (LC85) by chromium during 96 h of time interval. To combat the free radicals produced as result of metals exposure, gluthathione peroxidase activity dramatically increased by nearly 95% as compared to the reference group. Sodium-potassium adenosine triphosphatase (Na + -K + -ATPase) activity in gills significantly decreased in the first metal treated group and returned to the normal levels in the second (LC50) and third treated group (LC85) in case of chromium and copper respectively. Nevertheless, the values obtained for the digestive enzyme pepsin in the fish intestinal tissue had imprecise results.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"408"},"PeriodicalIF":3.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Sulfate removal from acid mine drainage using adsorbents derived from drinking water treatment plant residue: synthesis, characterization and comprehensive analysis. 饮用水处理厂废渣吸附剂去除酸性矿井废水中的硫酸盐:合成、表征和综合分析。
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-21 DOI: 10.1007/s10653-025-02667-7
Satish Chandra Bhuyan, Pallavi Behera, Himanshu Bhushan Sahu
{"title":"Sulfate removal from acid mine drainage using adsorbents derived from drinking water treatment plant residue: synthesis, characterization and comprehensive analysis.","authors":"Satish Chandra Bhuyan, Pallavi Behera, Himanshu Bhushan Sahu","doi":"10.1007/s10653-025-02667-7","DOIUrl":"10.1007/s10653-025-02667-7","url":null,"abstract":"<p><p>This paper focuses on the utilization of drinking water treatment plant residue (DWTPR) for sulfate removal from synthetic and real acid mine drainage (AMD) from the mine sumps of an Opencast Project (OCP) in Ib Valley Coalfields, MCL Odisha, India, and compares it with modified DWTPR. The physicochemical behavior of the adsorbents was analyzed by SEM, EDS, XRD, FTIR, BET, and pH<sub>ZPC</sub>. The optimum parameter for sulfate removal was obtained from varying initial concentrations, dosages, contact time, and pH of the solution. The findings showed that the modification introduced some new functional groups and altered crystallinity. The pH<sub>zpc</sub> of raw DWTPR, EDTA-DWTPR, and Chitosan-DWTPR were found to be 6.4, 7.1, and 8.8, respectively. The maximum sulfate removal (77.93%) was achieved using chitosan-modified DWTPR at pH 7.1 with a dosage of 5 g/100 mL and a contact time of 300 min in synthetic sulfate solution (Solution A). Chitosan-DWTPR removed 77.93%, 71.68%, and 62.76% of sulfate from Sump 1, Sump 2, and simulated AMD solution (Solution B), respectively. Additionally, up to 90% of other pollutants (Fe, Mn, Cu, Ni, and Al) were removed from both synthetic and real AMD samples. The Langmuir isotherm and pseudo-second-order kinetic model accurately described the experimental data. The thermodynamic analysis revealed that the process was non-spontaneous, exothermic, and associated with low randomness. Both raw and chitosan-modified DWTPR demonstrated remarkable neutralization ability for AMD. The study highlighted the significant role of chitosan in enhancing adsorbent properties for effective sulfate removal and mine effluent neutralization. Adsorption and chemical precipitation were identified as the primary mechanisms for the removal of sulfate and other pollutants.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"403"},"PeriodicalIF":3.8,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Occurrence, geochemical characteristics, and Monte Carlo simulations-based health risk assessment of uranium in groundwater in parts of upper Ganga Basin, India. 印度恒河上游部分地区地下水中铀的赋存、地球化学特征和基于蒙特卡罗模拟的健康风险评估
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-21 DOI: 10.1007/s10653-025-02701-8
Azka Azmi, Rashid Umar, Imran Khan
{"title":"Occurrence, geochemical characteristics, and Monte Carlo simulations-based health risk assessment of uranium in groundwater in parts of upper Ganga Basin, India.","authors":"Azka Azmi, Rashid Umar, Imran Khan","doi":"10.1007/s10653-025-02701-8","DOIUrl":"10.1007/s10653-025-02701-8","url":null,"abstract":"<p><p>Uranium (U) contamination in groundwater presents a serious global health hazard, driven by its radioactive nature and long-term persistence in aquatic systems. This study focuses on U contamination, its fate, mobility, speciation, and the associated health risks through ingestion and dermal pathways. Monte Carlo Simulations (MCS) were employed to develop a probabilistic framework, addressing variability and uncertainty in conventional Health Risk Assessments (HRA). A total of 72 groundwater samples were systematically collected in November 2023 from alluvial aquifers in western Uttar Pradesh, India. The mobilization of U is likely driven by oxidative dissolution, resulting from its limited adsorption to Fe-bearing minerals. PHREEQC-based speciation modeling indicates U mineral phases are undersaturated, favoring dissolution and mobility as stable hexavalent uranyl complexes. Negatively charged carbonate species, such as UO<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub><sup>4-</sup> and UO<sub>2</sub>(CO<sub>3</sub>)<sub>2</sub><sup>2-</sup>, exhibits high activity coefficients, indicating the role of carbonate complexation in U mobility under neutral to near-alkaline pH. HRA, employing MCS, revealed significant dual threats of radiological (carcinogenic) and chemical toxicity (non-carcinogenic) risks for males, females and children. Hazard index (HI) values exceeded safety thresholds (HI > 1) in 98% of samples for children, 92% for males, and 88% for females, with children being particularly vulnerable due to their lower body weight. Sensitivity analysis identified U concentrations as the most influential variable impacting risk analysis, followed by exposure frequency across all age groups. Infants and males exhibited higher annual ingestion doses (Da) of U, exceeding the WHO recommended limit of 100 µSv/year. This research highlights the critical need for effective groundwater management in U-endemic regions by highlighting probabilistic HRA as a key tool to reduce uncertainty.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"404"},"PeriodicalIF":3.8,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Health risk assessment of heavy metal(loid)s in a soil-rice system in the selenium-enriched area based on Monte Carlo simulation and bioaccessibility. 基于蒙特卡罗模拟和生物可及性的富硒区土壤-水稻系统重金属健康风险评价
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-20 DOI: 10.1007/s10653-025-02703-6
Qingsong Ge, Ge Chen, Wei Guo, Jiyang Zhao, Yuxue Yao, Lei Yang, Tao Jiang, Jiawen Chen, Liugen Zheng
{"title":"Health risk assessment of heavy metal(loid)s in a soil-rice system in the selenium-enriched area based on Monte Carlo simulation and bioaccessibility.","authors":"Qingsong Ge, Ge Chen, Wei Guo, Jiyang Zhao, Yuxue Yao, Lei Yang, Tao Jiang, Jiawen Chen, Liugen Zheng","doi":"10.1007/s10653-025-02703-6","DOIUrl":"10.1007/s10653-025-02703-6","url":null,"abstract":"<p><p>Although selenium (Se)-enriched soils represent a scarce resource, heavy metal contamination has restricted their utilization. The Huigu Town region, recognized as one of China's naturally Se-enriched areas, was selected for this study. We collected 30 paired rice grain and paddy soil samples to investigate the concentrations of heavy metal(loid)s (Se, As, Cd, Cr, Cu, Ni, Pb, and Zn), pollution levels, and health risks within the soil-rice system. Results indicated that the mean concentrations of Se, As, Cd, and Cu in soils exceeded regional background values. While rice grains exhibited Se enrichment, none of the heavy metal(loid)s exceeded the Chinese national standard for food safety. Health risk assessment adjusted by Physiologically Based Extraction Test (PBET) and Simplified Bioaccessibility Extraction Test (SBET), revealed lower carcinogenic and non-carcinogenic risks compared to total concentration-based assessment. Non-carcinogenic risk was within safe thresholds, and carcinogenic risk remained within tolerable limits. Monte Carlo simulations indicated that the cumulative probability of intolerable carcinogenic risk for both children and adults in the study area was less than 1%. Sensitivity analysis identified exposure frequency and dermal adsorption coefficient as the dominant contributors to carcinogenic risk across populations. Despite residing in a Se-enriched region, residents face potential risks of inadequate dietary Se intake, which could be mitigated through implementing dietary adjustments and soil matrix amelioration strategies.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"400"},"PeriodicalIF":3.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144946424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Children's playgrounds and urban pollution: Ecological and health risks from Cr, Ni, Pb, As, Cd, Cu, and Zn. 儿童游乐场与城市污染:Cr、Ni、Pb、As、Cd、Cu和Zn的生态和健康风险。
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-20 DOI: 10.1007/s10653-025-02694-4
Svetlana Đogo Mračević, Milan Stanković, Mladen Đurđević, Aleksa Vizi, Slavica Ražić
{"title":"Children's playgrounds and urban pollution: Ecological and health risks from Cr, Ni, Pb, As, Cd, Cu, and Zn.","authors":"Svetlana Đogo Mračević, Milan Stanković, Mladen Đurđević, Aleksa Vizi, Slavica Ražić","doi":"10.1007/s10653-025-02694-4","DOIUrl":"10.1007/s10653-025-02694-4","url":null,"abstract":"<p><p>We are observing a growing awareness of the need to protect the environment, and initiatives that promote parks for recreation and enjoyment for both adults and children are also being encouraged. Soil pollution in \"green urban oases\" is increasing due to the development and construction of industrial facilities nearby, the expansion of transportation networks, and the increasing amount of various types of construction waste. In this study, the concentrations and distributions of PTEs (Cr, Ni, Pb, As, Cd, Cu, and Zn) were measured in the topsoil of 17 children's playgrounds with natural play areas in the urban region of Belgrade, Serbia. After microwave-assisted acid digestion of the soil samples, measurements were conducted using an inductively coupled plasma optical emission spectrometer (OES-ICP). The data quality was validated through recovery tests with the certified reference material NIST 2711a. Potential sources of PTEs were identified using a chemometric approach involving principal component analysis (PCA). The PCA results revealed two factors accounting for 81.47% of the total variance, highlighting the importance of specific elements (PC1: Cd, Zn, Hg, Cu, and Pb; PC2: Ni, Cr, and As). Additionally, the ecological risk linked to the analyzed PTEs was assessed using various pollution indicators: contamination factor (CF), potential ecological risk index (RI), geo-accumulation index (Igeo), and Nemerov index (I<sub>IN</sub>). An assessment of non-carcinogenic health risks for children resulting from exposure to PTEs was also performed. The results of this study on PTEs provide a robust framework that can be applied to other urban environments.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"401"},"PeriodicalIF":3.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Effects of physicochemical factors on transport and retention of polystyrene microplastics (PS-MPs) in homogeneous and heterogeneous saturated porous media. 物理化学因素对聚苯乙烯微塑料(PS-MPs)在均相和非均相饱和多孔介质中迁移和滞留的影响
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-20 DOI: 10.1007/s10653-025-02724-1
Lixingzi Wu, Yanfeng Shi, Ling Fu, Xinle Han, Yanhao Zhang, Xu Zhang, Weina Xue, Xuli Jing, Jing Xu, Zhibin Zhang
{"title":"Effects of physicochemical factors on transport and retention of polystyrene microplastics (PS-MPs) in homogeneous and heterogeneous saturated porous media.","authors":"Lixingzi Wu, Yanfeng Shi, Ling Fu, Xinle Han, Yanhao Zhang, Xu Zhang, Weina Xue, Xuli Jing, Jing Xu, Zhibin Zhang","doi":"10.1007/s10653-025-02724-1","DOIUrl":"10.1007/s10653-025-02724-1","url":null,"abstract":"<p><p>Microplastics (MPs) as an emerging environmental contaminant pose significant ecological and health risks. This study investigated polystyrene microplastics (PS-MPs) transport and release in saturated heterogeneous porous media using quartz sand columns (eight configurations: homogeneous and heterogeneous) and Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. Experimental results showed increased PS-MPs retention in homogeneous media with smaller medium particles, larger PS-MPs (PS100, PS1000, PS5000), and higher ionic strength (1-10 mM NaCl/CaCl<sub>2</sub>). Heterogeneous media exhibited earlier breakthrough with two-peak phenomena due to preferential flow. Higher ionic strength and divalent cations (Ca<sup>2+</sup>) enhanced retention by reducing electrostatic repulsion. Breakthrough peaks for PS-MPs in heterogeneous media followed 0.1 μm > 5 μm > 1 μm, influenced by pore structure-induced flow disturbances. PS-MPs demonstrated re-release potential, particularly under water chemistry changes and media heterogeneity. These findings clarify PS-MPs behavior in subsurface environments, aiding risk assessment for aquifer contamination. Key factors include ionic conditions, particle size interactions, and media heterogeneity, emphasizing the need to address preferential flow paths in contaminant transport models. These findings help to understand the transport and release behavior of PS-MPs in saturated porous media and provide important references for assessing the transport risks of PS-MPs in subsurface aquifer environments.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"399"},"PeriodicalIF":3.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144882478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Short-term exposure to PM2.5 constituents and daily ischemic stroke hospitalization in the arid, semi-arid and semi-humid regions of northwest China. 西北干旱、半干旱、半湿润地区PM2.5成分短期暴露与缺血性卒中日住院率
IF 3.8 3区 环境科学与生态学
Environmental Geochemistry and Health Pub Date : 2025-08-20 DOI: 10.1007/s10653-025-02705-4
Zhiyi Wang, Jinyan Wang, Baolong Shi, Tianbei Wu, Jingjie Wang, Shujuan Hu
{"title":"Short-term exposure to PM<sub>2.5</sub> constituents and daily ischemic stroke hospitalization in the arid, semi-arid and semi-humid regions of northwest China.","authors":"Zhiyi Wang, Jinyan Wang, Baolong Shi, Tianbei Wu, Jingjie Wang, Shujuan Hu","doi":"10.1007/s10653-025-02705-4","DOIUrl":"10.1007/s10653-025-02705-4","url":null,"abstract":"<p><p>Adverse effect PM<sub>2.5</sub> on ischemic stroke (IS) has been proved in previous studies. However, previous studies have mostly been conducted in eastern China (humid region), the health impacts of specific particulate matter constituents on IS, particularly in arid, semi-arid, and semi humid regions, remain poorly understood. We conducted a time-series study across nine districts in Gansu Province from 2015 to 2021 to evaluate the associations between short-term exposure to PM<sub>2.5</sub> chemical components-including sulfate (SO<sub>4</sub><sup>2</sup><sup>-</sup>), nitrate (NO<sub>3</sub><sup>-</sup>), ammonium (NH<sub>4</sub><sup>+</sup>), organic matter (OM), and black carbon (BC)-and hospital admissions for ischemic stroke. Generalized additive models were applied to estimate relative risks (RRs) of IS hospital admissions, with subgroup analyses by age, sex, and living region. Our findings demonstrated that short-term exposure to PM<sub>2.5</sub> and its constituents was associated with increased IS hospitalization, with the strongest associations observed on lag 0 (ions constituents) and lag 7 days (carbon-containing components). For subgroup analysis, female and individuals aged ≥ 65 years were more sensitive to PM<sub>2.5</sub> and its constituents. Regional analyses revealed that semi-arid region residents experienced the highest risks, while semi humid region showed relatively lower health impacts. Among all the components, NO<sub>3</sub><sup>-</sup> revealed the strongest health effect. These results suggested that specific PM<sub>2.5</sub> constituents contribute to acute IS risks, with notable variation across demographic and geographic subgroups. Our study provides critical evidence on the cardiovascular health effects of PM<sub>2.5</sub> components in arid and semi-arid area around the world, underscoring the need for public health interventions and pollution mitigation strategies to protect vulnerable populations.</p>","PeriodicalId":11759,"journal":{"name":"Environmental Geochemistry and Health","volume":"47 10","pages":"402"},"PeriodicalIF":3.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144947241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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