首页 > 最新文献

Journal of contaminant hydrology最新文献

英文 中文
Understanding and addressing microplastic pollution: Impacts, mitigation, and future perspectives 了解并解决微塑料污染问题:影响、缓解和未来展望
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-17 DOI: 10.1016/j.jconhyd.2024.104399
Rajesh Debnath , Gora Shiva Prasad , Adnan Amin , Monisa M. Malik , Ishtiyaq Ahmad , Adnan Abubakr , Simanku Borah , Mohd Ashraf Rather , Federica Impellitteri , Ifra Tabassum , Giuseppe Piccione , Caterina Faggio

Improper disposal of household and industrial waste into water bodies has transformed them into de facto dumping grounds. Plastic debris, weathered on beaches degrades into micro-particles and releases chemical additives that enter the water. Microplastic contamination is documented globally in both marine and freshwater environments, posing a significant threat to aquatic ecosystems. The small size of these particles makes them susceptible to ingestion by low trophic fauna, a trend expected to escalate. Ingestion leads to adverse effects like intestinal blockages, alterations in lipid metabolism, histopathological changes in the intestine, contributing to the extinction of vulnerable species and disrupting ecosystem balance. Notably, microplastics (MPs) can act as carriers for pathogens, potentially causing impaired reproductive activity, decreased immunity, and cancer in various organisms. Studies have identified seven principal sources of MPs, including synthetic textiles (35%) and tire abrasion (28%), highlighting the significant human contribution to this pollution. This review covers various aspects of microplastic pollution, including sources, extraction methods, and its profound impact on ecosystems. Additionally, it explores preventive measures, aiming to guide researchers in selecting techniques and inspiring further investigation into the far-reaching impacts of microplastic pollution, fostering effective solutions for this environmental challenge.

向水体倾倒生活垃圾和工业废物的不当行为使水体变成了事实上的垃圾场。在海滩上风化的塑料碎片会降解成微型颗粒,并释放出化学添加剂进入水中。微塑料污染在全球海洋和淡水环境中都有记录,对水生生态系统构成严重威胁。这些微粒体积小,很容易被低营养级动物摄入,而且这种趋势预计还会加剧。摄入会导致肠道堵塞、脂质代谢改变、肠道组织病理变化等不良后果,导致脆弱物种灭绝,破坏生态系统平衡。值得注意的是,微塑料(MPs)可作为病原体的载体,可能导致各种生物的生殖活动受损、免疫力下降和癌症。研究发现了七种主要的 MPs 来源,包括合成纺织品(35%)和轮胎磨损(28%),凸显了人类对这种污染的重大贡献。本综述涉及微塑料污染的各个方面,包括来源、提取方法及其对生态系统的深远影响。此外,它还探讨了预防措施,旨在指导研究人员选择技术,启发他们进一步研究微塑料污染的深远影响,从而为这一环境挑战提供有效的解决方案。
{"title":"Understanding and addressing microplastic pollution: Impacts, mitigation, and future perspectives","authors":"Rajesh Debnath ,&nbsp;Gora Shiva Prasad ,&nbsp;Adnan Amin ,&nbsp;Monisa M. Malik ,&nbsp;Ishtiyaq Ahmad ,&nbsp;Adnan Abubakr ,&nbsp;Simanku Borah ,&nbsp;Mohd Ashraf Rather ,&nbsp;Federica Impellitteri ,&nbsp;Ifra Tabassum ,&nbsp;Giuseppe Piccione ,&nbsp;Caterina Faggio","doi":"10.1016/j.jconhyd.2024.104399","DOIUrl":"10.1016/j.jconhyd.2024.104399","url":null,"abstract":"<div><p>Improper disposal of household and industrial waste into water bodies has transformed them into de facto dumping grounds. Plastic debris, weathered on beaches degrades into micro-particles and releases chemical additives that enter the water. Microplastic contamination is documented globally in both marine and freshwater environments, posing a significant threat to aquatic ecosystems. The small size of these particles makes them susceptible to ingestion by low trophic fauna, a trend expected to escalate. Ingestion leads to adverse effects like intestinal blockages, alterations in lipid metabolism, histopathological changes in the intestine, contributing to the extinction of vulnerable species and disrupting ecosystem balance. Notably, microplastics (MPs) can act as carriers for pathogens, potentially causing impaired reproductive activity, decreased immunity, and cancer in various organisms. Studies have identified seven principal sources of MPs, including synthetic textiles (35%) and tire abrasion (28%), highlighting the significant human contribution to this pollution. This review covers various aspects of microplastic pollution, including sources, extraction methods, and its profound impact on ecosystems. Additionally, it explores preventive measures, aiming to guide researchers in selecting techniques and inspiring further investigation into the far-reaching impacts of microplastic pollution, fostering effective solutions for this environmental challenge.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"266 ","pages":"Article 104399"},"PeriodicalIF":3.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0169772224001037/pdfft?md5=9d867d626dbd230cc14e62c059a23296&pid=1-s2.0-S0169772224001037-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141732301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Going deeper into plutonium sorption affected by redox 深入研究氧化还原对钚吸附的影响
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-17 DOI: 10.1016/j.jconhyd.2024.104400
Anna Yu. Romanchuk , Alexander L. Trigub , Stepan N. Kalmykov

Sorption of Pu(VI) onto synthesized goethite under oxidizing and normal conditions was investigated, which revealed its pH dependence on different solid/liquid ratios. Pu speciation upon sorption on the solid phase was characterized via extended X-ray absorption fine structure (EXAFS) spectroscopy, while that in solution was assessed using ultraviolet–visible (UV–Vis) spectroscopy and liquid–liquid extraction. The obtained results demonstrate differences in plutonium behavior in the studied systems. Pu(VI) remains hexavalent on the goethite surface and in solution under oxidizing conditions. While Pu(IV) is stabilized on the mineral and Pu(V) is found in solution under normal conditions. This study provides the thermodynamic descriptions of these reactions.

研究了在氧化和正常条件下,钚(VI)在合成的鹅绿泥石上的吸附情况,发现其与不同固/液比例的 pH 值有关。通过扩展 X 射线吸收精细结构(EXAFS)光谱分析了钚在固相上吸附时的标示特征,同时使用紫外可见光(UV-Vis)光谱和液液萃取法评估了溶液中的标示特征。所获得的结果表明,钚在所研究的体系中的行为存在差异。在氧化条件下,Pu(VI) 在鹅绿泥石表面和溶液中保持六价。而在正常条件下,钚(IV)稳定在矿物上,钚(V)则存在于溶液中。本研究提供了这些反应的热力学描述。
{"title":"Going deeper into plutonium sorption affected by redox","authors":"Anna Yu. Romanchuk ,&nbsp;Alexander L. Trigub ,&nbsp;Stepan N. Kalmykov","doi":"10.1016/j.jconhyd.2024.104400","DOIUrl":"10.1016/j.jconhyd.2024.104400","url":null,"abstract":"<div><p>Sorption of Pu(VI) onto synthesized goethite under oxidizing and normal conditions was investigated, which revealed its pH dependence on different solid/liquid ratios. Pu speciation upon sorption on the solid phase was characterized via extended X-ray absorption fine structure (EXAFS) spectroscopy, while that in solution was assessed using ultraviolet–visible (UV–Vis) spectroscopy and liquid–liquid extraction. The obtained results demonstrate differences in plutonium behavior in the studied systems. Pu(VI) remains hexavalent on the goethite surface and in solution under oxidizing conditions. While Pu(IV) is stabilized on the mineral and Pu(V) is found in solution under normal conditions. This study provides the thermodynamic descriptions of these reactions.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"266 ","pages":"Article 104400"},"PeriodicalIF":3.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636723","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
Traversing the prevalence of microplastics in soil-agro ecosystems: Origin, occurrence, and pollutants synergies 探索土壤-农业生态系统中微塑料的普遍存在:起源、发生和污染物协同作用
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-14 DOI: 10.1016/j.jconhyd.2024.104398
Kanika Dogra , Manish Kumar , Kanchan Deoli Bahukhandi , Jian Zang

The ubiquity of plastics in modern life has made them a significant environmental concern and a marker of the Anthropocene era. The degradation of plastics results in the formation of microplastics (MPs), which measure 5 mm or less. The coexistence of MPs with other pollutants found in sludge, water treatment plant effluents, surface water, and groundwater, shapes the environmental landscape together. Despite extensive investigation, the long-term implications of MPs in soils remain uncertain, underscoring the importance of delving into their transportation and interactions with soil biota and other contaminants. The present article provides a comprehensive overview of MPs contamination in soil, encompassing its sources, prevalence, features, and interactions with soil flora and fauna, heavy metals, and organic compounds. The sources of MPs in soil agroecosystems are mulching, composting, littering, sewage sludge, irrigation water, and fertilizer application. The concentration of MPs reported in plastic mulch, littering, and sewage sludge is 503 ± 2760 items per kg−1, 4483 ± 2315 MPs/kg, and 11,100 ± 570 per/kg. The transport of MPs in soil agroecosystems is due to their horizontal and vertical migration including biotic and abiotic mobility. The article also highlighted the analytical process, which includes sampling planning, collection, purification, extraction, and identification techniques of MPs in soil agroecosystems. The mechanism in the interaction of MPs and organic pollutants includes surface adsorption or adhesion cation bridging, hydrogen bonding, charge transfer, ligand exchange, van der Waals interactions, and ion exchange.

塑料在现代生活中无处不在,已成为一个重要的环境问题和人类世时代的标志。塑料降解后会形成 5 毫米或更小的微塑料(MPs)。微塑料与污泥、水处理厂污水、地表水和地下水中的其他污染物共存,共同塑造了环境景观。尽管进行了广泛的调查,但土壤中 MPs 的长期影响仍不确定,这凸显了深入研究 MPs 的迁移及其与土壤生物群和其他污染物相互作用的重要性。本文全面概述了土壤中的 MPs 污染情况,包括其来源、普遍性、特征以及与土壤动植物群、重金属和有机化合物之间的相互作用。土壤农业生态系统中 MPs 的来源包括覆盖物、堆肥、乱扔垃圾、污水污泥、灌溉水和施肥。据报道,塑料地膜、垃圾和污水污泥中 MPs 的浓度分别为 503 ± 2760 微克/千克-1、4483 ± 2315 微克/千克和 11,100 ± 570 微克/千克。多溴联苯醚在土壤农业生态系统中的迁移是由于其水平和垂直迁移,包括生物和非生物迁移。文章还重点介绍了土壤农业生态系统中 MPs 的分析过程,包括取样计划、采集、净化、提取和鉴定技术。MPs 与有机污染物的相互作用机制包括表面吸附或粘附、阳离子桥接、氢键、电荷转移、配体交换、范德华相互作用和离子交换。
{"title":"Traversing the prevalence of microplastics in soil-agro ecosystems: Origin, occurrence, and pollutants synergies","authors":"Kanika Dogra ,&nbsp;Manish Kumar ,&nbsp;Kanchan Deoli Bahukhandi ,&nbsp;Jian Zang","doi":"10.1016/j.jconhyd.2024.104398","DOIUrl":"10.1016/j.jconhyd.2024.104398","url":null,"abstract":"<div><p>The ubiquity of plastics in modern life has made them a significant environmental concern and a marker of the Anthropocene era. The degradation of plastics results in the formation of microplastics (MPs), which measure 5 mm or less. The coexistence of MPs with other pollutants found in sludge, water treatment plant effluents, surface water, and groundwater, shapes the environmental landscape together. Despite extensive investigation, the long-term implications of MPs in soils remain uncertain, underscoring the importance of delving into their transportation and interactions with soil biota and other contaminants. The present article provides a comprehensive overview of MPs contamination in soil, encompassing its sources, prevalence, features, and interactions with soil flora and fauna, heavy metals, and organic compounds. The sources of MPs in soil agroecosystems are mulching, composting, littering, sewage sludge, irrigation water, and fertilizer application. The concentration of MPs reported in plastic mulch, littering, and sewage sludge is 503 ± 2760 items per kg<sup>−1</sup>, 4483 ± 2315 MPs/kg, and 11,100 ± 570 per/kg. The transport of MPs in soil agroecosystems is due to their horizontal and vertical migration including biotic and abiotic mobility. The article also highlighted the analytical process, which includes sampling planning, collection, purification, extraction, and identification techniques of MPs in soil agroecosystems. The mechanism in the interaction of MPs and organic pollutants includes surface adsorption or adhesion cation bridging, hydrogen bonding, charge transfer, ligand exchange, van der Waals interactions, and ion exchange.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"266 ","pages":"Article 104398"},"PeriodicalIF":3.5,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141711740","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
Distribution and effects of microplastics as carriers of heavy metals in river surface sediments 微塑料作为重金属载体在河流表层沉积物中的分布及其影响
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-14 DOI: 10.1016/j.jconhyd.2024.104396
Changyuan Wang , Xin Liu , Qianqian Ma , Shuyu Xing , Lubin Yuan , Yan Ma

There are few studies on microplastics (MPs) in urban river sediments compared to oceans, soils, and even rivers. In this study, the seasonal abundance of MPs, as well as their influencing factors on heavy metal adsorption in river sediments of the Ancient Canal of Zhenjiang City, China, were investigated for the first time. Through on-site sampling, microscopic observation, Raman spectroscopy, scanning electron microscopy, and high-temperature digestion, the abundance, shape, color, particle size, type, and surface characteristics of MPs in Ancient Canal sediments in different seasons, as well as the influencing factors of MPs as heavy metal carriers in different seasons, were analyzed. The results showed that the average abundance of MPs is 2049.09 ± 883.78 and 2216.36 ± 826.21 items kg−1 dry sediments in summer and winter, respectively, and different sites change significantly. In addition, particle sizes, types, colors, and shapes of MPs exhibited seasonal variations. Four MPs shapes were mainly observed: fibers, fragments, particles, and films. Among them, MPs in summer sediments are mainly fiber, and MPs in winter sediments are mainly particles. In the sediment in summer and winter, transparent MPs and small-size (<0.5 mm) MPs are the main ones, where the abundance of MPs decreased with increasing MPs size. The main MPs species are polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate (PC), and polyethylene (PE), with PP being the predominant MPs in the sediments in different seasons. Scanning electron microscopy-energy dispersive spectrometer (SEM-EDS) revealed that the surfaces of the MPs were characterized by rough, porous, cracked, and torn, with the attachment of various heavy metal elements, and all of the heavy metal elements accumulated to different degrees on the MPs. There was a significant positive correlation (p < 0.05) between the Mn content in the MPs and the Mn content in the sediments in winter, suggesting that the Mn in the MPs in winter may be derived from the sediments. In addition, the type, shape, size, and color of MPs affect the adsorption capacity of heavy metals. Most of the adsorption of MPs on Pb showed a significant negative correlation, and the adsorption of MPs on Cr, Zn, Cu, Cd, and Mn showed a significant positive correlation. MPs can be used as carriers of heavy metals, which will further enhance the hazards of living organisms and pose a potential threat to the safety of the urban river environment.

与海洋、土壤甚至河流相比,有关城市河流沉积物中微塑料(MPs)的研究很少。本研究首次对镇江市古运河河道沉积物中微塑料的季节丰度及其对重金属吸附的影响因素进行了研究。通过现场取样、显微观察、拉曼光谱、扫描电镜和高温消解等方法,分析了不同季节古运河沉积物中MPs的丰度、形状、颜色、粒径、类型和表面特征,以及不同季节MPs作为重金属载体的影响因素。结果表明,夏季和冬季干沉积物中 MPs 的平均丰度分别为 2049.09 ± 883.78 和 2216.36 ± 826.21 项 kg-1,且不同地点变化显著。此外,MPs 的粒径、类型、颜色和形状也表现出季节性变化。主要观察到四种形状的 MPs:纤维、碎片、颗粒和薄膜。其中,夏季沉积物中的 MPs 以纤维为主,冬季沉积物中的 MPs 以颗粒为主。在夏季和冬季沉积物中,以透明 MPs 和小尺寸(0.5 mm)MPs 为主,MPs 的丰度随 MPs 尺寸的增大而降低。不同季节沉积物中的主要中微子种类为聚氯乙烯(PVC)、聚苯乙烯(PS)、聚丙烯(PP)、聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)和聚乙烯(PE),其中聚丙烯是最主要的中微子。扫描电子显微镜-能量色散光谱仪(SEM-EDS)显示,MPs 表面具有粗糙、多孔、裂纹和撕裂等特征,并附着有各种重金属元素,所有重金属元素在 MPs 上都有不同程度的积累。中压物质中的锰含量与冬季沉积物中的锰含量存在明显的正相关(p <0.05),表明冬季中压物质中的锰可能来自沉积物。此外,MPs 的类型、形状、大小和颜色也会影响其对重金属的吸附能力。大多数 MPs 对铅的吸附呈显著负相关,而 MPs 对铬、锌、铜、镉和锰的吸附呈显著正相关。MPs 可作为重金属的载体,这将进一步加剧对生物体的危害,并对城市河流环境的安全构成潜在威胁。
{"title":"Distribution and effects of microplastics as carriers of heavy metals in river surface sediments","authors":"Changyuan Wang ,&nbsp;Xin Liu ,&nbsp;Qianqian Ma ,&nbsp;Shuyu Xing ,&nbsp;Lubin Yuan ,&nbsp;Yan Ma","doi":"10.1016/j.jconhyd.2024.104396","DOIUrl":"10.1016/j.jconhyd.2024.104396","url":null,"abstract":"<div><p>There are few studies on microplastics (MPs) in urban river sediments compared to oceans, soils, and even rivers. In this study, the seasonal abundance of MPs, as well as their influencing factors on heavy metal adsorption in river sediments of the Ancient Canal of Zhenjiang City, China, were investigated for the first time. Through on-site sampling, microscopic observation, Raman spectroscopy, scanning electron microscopy, and high-temperature digestion, the abundance, shape, color, particle size, type, and surface characteristics of MPs in Ancient Canal sediments in different seasons, as well as the influencing factors of MPs as heavy metal carriers in different seasons, were analyzed. The results showed that the average abundance of MPs is 2049.09 ± 883.78 and 2216.36 ± 826.21 items kg<sup>−1</sup> dry sediments in summer and winter, respectively, and different sites change significantly. In addition, particle sizes, types, colors, and shapes of MPs exhibited seasonal variations. Four MPs shapes were mainly observed: fibers, fragments, particles, and films. Among them, MPs in summer sediments are mainly fiber, and MPs in winter sediments are mainly particles. In the sediment in summer and winter, transparent MPs and small-size (&lt;0.5 mm) MPs are the main ones, where the abundance of MPs decreased with increasing MPs size. The main MPs species are polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate (PC), and polyethylene (PE), with PP being the predominant MPs in the sediments in different seasons. Scanning electron microscopy-energy dispersive spectrometer (SEM-EDS) revealed that the surfaces of the MPs were characterized by rough, porous, cracked, and torn, with the attachment of various heavy metal elements, and all of the heavy metal elements accumulated to different degrees on the MPs. There was a significant positive correlation (<em>p</em> &lt; 0.05) between the Mn content in the MPs and the Mn content in the sediments in winter, suggesting that the Mn in the MPs in winter may be derived from the sediments. In addition, the type, shape, size, and color of MPs affect the adsorption capacity of heavy metals. Most of the adsorption of MPs on Pb showed a significant negative correlation, and the adsorption of MPs on Cr, Zn, Cu, Cd, and Mn showed a significant positive correlation. MPs can be used as carriers of heavy metals, which will further enhance the hazards of living organisms and pose a potential threat to the safety of the urban river environment.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"266 ","pages":"Article 104396"},"PeriodicalIF":3.5,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141690343","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
Tricks and tracks of prevalence, occurrences, treatment technologies, and challenges of mixtures of emerging contaminants in the environment: With special emphasis on microplastic 环境中新出现的污染物混合物的流行率、发生率、处理技术和挑战的技巧和轨迹:特别强调微塑料。
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104389
Jayaraman Sethuraman Sudarsan , Kanika Dogra , Rakesh Kumar , Nirav P. Raval , Mats Leifels , Santanu Mukherjee , Mrugesh H. Trivedi , Mayur Shirish Jain , Jian Zang , Damià Barceló , Jürgen Mahlknecht , Manish Kumar

This paper aims to emphasize the occurrence of various emerging contaminant (EC) mixtures in natural ecosystems and highlights the primary concern arising from the unregulated release into soil and water, along with their impacts on human health. Emerging contaminant mixtures, including pharmaceuticals, personal care products, dioxins, polychlorinated biphenyls, pesticides, antibiotics, biocides, surfactants, phthalates, enteric viruses, and microplastics (MPs), are considered toxic contaminants with grave implications. MPs play a crucial role in transporting pollutants to aquatic and terrestrial ecosystems as they interact with the various components of the soil and water environments. This review summarizes that major emerging contaminants (ECs), like trimethoprim, diclofenac, sulfamethoxazole, and 17α-Ethinylestradiol, pose serious threats to public health and contribute to antimicrobial resistance. In addressing human health concerns and remediation techniques, this review critically evaluates conventional methods for removing ECs from complex matrices. The diverse physiochemical properties of surrounding environments facilitate the partitioning of ECs into sediments and other organic phases, resulting in carcinogenic, teratogenic, and estrogenic effects through active catalytic interactions and mechanisms mediated by aryl hydrocarbon receptors. The proactive toxicity of ECs mixture complexation and, in part, the yet-to-be-identified environmental mixtures of ECs represent a blind spot in current literature, necessitating conceptual frameworks for assessing the toxicity and risks with individual components and mixtures. Lastly, this review concludes with an in-depth exploration of future scopes, knowledge gaps, and challenges, emphasizing the need for a concerted effort in managing ECs and other organic pollutants.

本文旨在强调各种新出现的污染物混合物在自然生态系统中的出现情况,并着重指出不受管制地向土壤和水中释放污染物及其对人类健康的影响所引起的主要关切。新出现的污染物混合物,包括药品、个人护理产品、二恶英、多氯联苯、杀虫剂、抗生素、杀菌剂、表面活性剂、邻苯二甲酸盐、肠道病毒和微塑料(MPs),被认为是具有严重影响的有毒污染物。微塑料与土壤和水环境中的各种成分相互作用,在向水生和陆生生态系统输送污染物方面发挥着至关重要的作用。本综述概述了主要的新出现污染物(ECs),如三甲氧苄啶、双氯芬酸、磺胺甲噁唑和 17α-乙炔雌二醇,对公众健康构成严重威胁,并导致抗菌药耐药性。针对人类健康问题和补救技术,本综述对从复杂基质中去除氨基甲酸乙酯的传统方法进行了严格评估。周围环境的理化性质多种多样,这有助于将氨基甲酸乙酯分配到沉积物和其他有机相中,从而通过芳基烃受体介导的活性催化相互作用和机制,产生致癌、致畸和雌激素效应。氨基甲酸乙酯混合物复合物的主动毒性,以及部分尚未确定的氨基甲酸乙酯环境混合物,是目前文献中的一个盲点,因此有必要建立概念框架,以评估单个成分和混合物的毒性和风险。最后,本综述对未来的研究范围、知识差距和挑战进行了深入探讨,强调需要齐心协力管理氨基甲酸乙酯和其他有机污染物。
{"title":"Tricks and tracks of prevalence, occurrences, treatment technologies, and challenges of mixtures of emerging contaminants in the environment: With special emphasis on microplastic","authors":"Jayaraman Sethuraman Sudarsan ,&nbsp;Kanika Dogra ,&nbsp;Rakesh Kumar ,&nbsp;Nirav P. Raval ,&nbsp;Mats Leifels ,&nbsp;Santanu Mukherjee ,&nbsp;Mrugesh H. Trivedi ,&nbsp;Mayur Shirish Jain ,&nbsp;Jian Zang ,&nbsp;Damià Barceló ,&nbsp;Jürgen Mahlknecht ,&nbsp;Manish Kumar","doi":"10.1016/j.jconhyd.2024.104389","DOIUrl":"10.1016/j.jconhyd.2024.104389","url":null,"abstract":"<div><p>This paper aims to emphasize the occurrence of various emerging contaminant (EC) mixtures in natural ecosystems and highlights the primary concern arising from the unregulated release into soil and water, along with their impacts on human health. Emerging contaminant mixtures, including pharmaceuticals, personal care products, dioxins, polychlorinated biphenyls, pesticides, antibiotics, biocides, surfactants, phthalates, enteric viruses, and microplastics (MPs), are considered toxic contaminants with grave implications. MPs play a crucial role in transporting pollutants to aquatic and terrestrial ecosystems as they interact with the various components of the soil and water environments. This review summarizes that major emerging contaminants (ECs), like trimethoprim, diclofenac, sulfamethoxazole, and 17α-Ethinylestradiol, pose serious threats to public health and contribute to antimicrobial resistance. In addressing human health concerns and remediation techniques, this review critically evaluates conventional methods for removing ECs from complex matrices. The diverse physiochemical properties of surrounding environments facilitate the partitioning of ECs into sediments and other organic phases, resulting in carcinogenic, teratogenic, and estrogenic effects through active catalytic interactions and mechanisms mediated by aryl hydrocarbon receptors. The proactive toxicity of ECs mixture complexation and, in part, the yet-to-be-identified environmental mixtures of ECs represent a blind spot in current literature, necessitating conceptual frameworks for assessing the toxicity and risks with individual components and mixtures. Lastly, this review concludes with an in-depth exploration of future scopes, knowledge gaps, and challenges, emphasizing the need for a concerted effort in managing ECs and other organic pollutants.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104389"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141468467","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
Reactive transport modelling as a toolbox to compare remediation strategies for aquifers impacted by uranium in situ recovery 将反应迁移模型作为比较受铀原位回收影响的含水层修复战略的工具箱
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104392
Nicolas Seigneur , Niya Grozeva , Bayarmaa Purevsan , Michaël Descostes

More than 60% of worldwide uranium production is based on the In Situ Recovery mining technique. This exploitation method directly falls within the scope of the applications of reactive transport modelling to optimize uranium production and limit its associated environmental impact. We propose a modelling approach which is able to represent the natural evolution of an aquifer impacted by an ISR test performed using sulfuric acid. The model is calibrated on a 12 year-long data series obtained from 12 monitoring wells surrounding an ISR pilot cell. Through this process-based approach, we simulate the impact of several remediation strategies that can be considered in these contexts. In particular, we model the impact of Pump & Treat combined with reverse osmosis, as well as the circulation of non-impacted fluids through the reservoir with different operating strategies. Our approach allows to compare the effectiveness of these strategies. For this small-scale ISR pilot, monitored natural attenuation constitutes an interesting approach due to its faster pH recovery time with respect to Pump & Treat (5–10 years to pH 6), whose efficiency can be improved by the addition of exchangeable cations. Circulation of unimpacted fluids can reduce pH recovery times if performed for periods longer than the ISR exploitation and/or deployed with a delay. Combined with an economic evaluation of their deployment, this modelling approach can help the mining operator select and design optimal remediation strategies from an environmental and economical standpoint.

全世界 60% 以上的铀生产都是基于原位回收开采技术。这种开采方法直接属于反应输运建模的应用范围,以优化铀生产并限制其相关的环境影响。我们提出了一种建模方法,该方法能够代表受使用硫酸进行的 ISR 试验影响的含水层的自然演变。该模型根据从 ISR 试验单元周围 12 口监测井获得的 12 年数据序列进行校准。通过这种基于过程的方法,我们模拟了在这种情况下可以考虑的几种修复策略的影响。特别是,我们模拟了泵 & 的影响;处理与反渗透的结合,以及不同操作策略下未受影响的流体在储层中的循环。我们的方法可以比较这些策略的有效性。对于这种小规模的 ISR 试验,监测自然衰减是一种有趣的方法,因为它的 pH 值恢复时间比泵& 处理(5-10 年至 pH ∼ 6)更快,其效率可以通过添加可交换阳离子来提高。如果循环未受影响的流体的时间长于 ISR 开发时间和/或延迟部署,则可缩短 pH 值恢复时间。结合对其部署的经济评估,这种建模方法可帮助采矿运营商从环境和经济角度选择和设计最佳修复战略。
{"title":"Reactive transport modelling as a toolbox to compare remediation strategies for aquifers impacted by uranium in situ recovery","authors":"Nicolas Seigneur ,&nbsp;Niya Grozeva ,&nbsp;Bayarmaa Purevsan ,&nbsp;Michaël Descostes","doi":"10.1016/j.jconhyd.2024.104392","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104392","url":null,"abstract":"<div><p>More than 60% of worldwide uranium production is based on the In Situ Recovery mining technique. This exploitation method directly falls within the scope of the applications of reactive transport modelling to optimize uranium production and limit its associated environmental impact. We propose a modelling approach which is able to represent the natural evolution of an aquifer impacted by an ISR test performed using sulfuric acid. The model is calibrated on a 12 year-long data series obtained from 12 monitoring wells surrounding an ISR pilot cell. Through this process-based approach, we simulate the impact of several remediation strategies that can be considered in these contexts. In particular, we model the impact of Pump &amp; Treat combined with reverse osmosis, as well as the circulation of non-impacted fluids through the reservoir with different operating strategies. Our approach allows to compare the effectiveness of these strategies. For this small-scale ISR pilot, monitored natural attenuation constitutes an interesting approach due to its faster pH recovery time with respect to Pump &amp; Treat (5–10 years to pH <span><math><mo>∼</mo></math></span> 6), whose efficiency can be improved by the addition of exchangeable cations. Circulation of unimpacted fluids can reduce pH recovery times if performed for periods longer than the ISR exploitation and/or deployed with a delay. Combined with an economic evaluation of their deployment, this modelling approach can help the mining operator select and design optimal remediation strategies from an environmental and economical standpoint.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104392"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0169772224000962/pdfft?md5=2fde9559d22e7d3b9081170890a43f6d&pid=1-s2.0-S0169772224000962-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141478717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Geochemical evaluation of Washita-Fredericksburg formation as a carbon storage reservoir 作为碳储存库的 Washita-Fredericksburg 地层地球化学评估。
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104393
Nora V. Lopez Rivera , Lauren E. Beckingham

Geological carbon sequestration is a promising technique to reduce atmospheric greenhouse gas emissions. The Washita-Fredericksburg formation in the southeastern United States is being considered as a prospective storage formation. This requires understanding the geochemical impact of CO2 injection on the formation, which is the focus of this work. Here, sandstone samples from the Washita-Fredericksburg formation are analyzed to understand their overall mineralogical composition and the potential geochemical processes that might occur following CO2 injection. Powder X-ray diffraction (XRD) analysis, Scanning Electron Microscopy (SEM) imaging, and image analysis were used to identify mineral phases. SEM images were processed to create a segmented mineral map, which was then used to calculate mineral volume fractions and porosity. Results show that the sample has a porosity of 20% and is mainly composed of quartz, K-feldspar, muscovite, and clays. Accessory minerals such as titanite were also found. Reactive transport models were constructed to assess potential CO2-brine-mineral interactions following CO2 injection. Simulation results suggest that the overall extent of mineral dissolution and precipitation reactions over 10,000 days is limited, with muscovite dissolution increasing porosity to 22%. Limited mineral reactions suggest more injected CO2 will exist in free and dissolved forms, which may require more extensive long-term monitoring.

地质碳封存是减少大气温室气体排放的一项前景广阔的技术。美国东南部的瓦希塔-弗雷德里克斯堡地层被认为是一种有前景的封存地层。这就需要了解二氧化碳注入对地层的地球化学影响,这也是本研究的重点。本文分析了来自瓦希塔-弗雷德里克斯堡地层的砂岩样本,以了解其整体矿物组成以及注入二氧化碳后可能发生的潜在地球化学过程。粉末 X 射线衍射 (XRD) 分析、扫描电子显微镜 (SEM) 成像和图像分析被用来识别矿物相。对扫描电子显微镜图像进行处理后绘制出分段矿物图,然后用于计算矿物体积分数和孔隙度。结果显示,样品的孔隙率为 20%,主要由石英、K 长石、褐铁矿和粘土组成。此外,还发现了榍石等辅助矿物。构建了反应迁移模型,以评估二氧化碳注入后潜在的二氧化碳-盐-矿物相互作用。模拟结果表明,10,000 天内矿物溶解和沉淀反应的总体程度是有限的,麝香石的溶解使孔隙度增加到 22%。有限的矿物反应表明,更多注入的二氧化碳将以游离和溶解的形式存在,这可能需要更广泛的长期监测。
{"title":"Geochemical evaluation of Washita-Fredericksburg formation as a carbon storage reservoir","authors":"Nora V. Lopez Rivera ,&nbsp;Lauren E. Beckingham","doi":"10.1016/j.jconhyd.2024.104393","DOIUrl":"10.1016/j.jconhyd.2024.104393","url":null,"abstract":"<div><p>Geological carbon sequestration is a promising technique to reduce atmospheric greenhouse gas emissions. The Washita-Fredericksburg formation in the southeastern United States is being considered as a prospective storage formation. This requires understanding the geochemical impact of CO<sub>2</sub> injection on the formation, which is the focus of this work. Here, sandstone samples from the Washita-Fredericksburg formation are analyzed to understand their overall mineralogical composition and the potential geochemical processes that might occur following CO<sub>2</sub> injection. Powder X-ray diffraction (XRD) analysis, Scanning Electron Microscopy (SEM) imaging, and image analysis were used to identify mineral phases. SEM images were processed to create a segmented mineral map, which was then used to calculate mineral volume fractions and porosity. Results show that the sample has a porosity of 20% and is mainly composed of quartz, K-feldspar, muscovite, and clays. Accessory minerals such as titanite were also found. Reactive transport models were constructed to assess potential CO<sub>2</sub>-brine-mineral interactions following CO<sub>2</sub> injection. Simulation results suggest that the overall extent of mineral dissolution and precipitation reactions over 10,000 days is limited, with muscovite dissolution increasing porosity to 22%. Limited mineral reactions suggest more injected CO<sub>2</sub> will exist in free and dissolved forms, which may require more extensive long-term monitoring.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104393"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141468466","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
Comparative study of polystyrene microplastic transport behavior in three different filter media: Quartz sand, zeolite, and anthracite 聚苯乙烯微塑料在三种不同过滤介质中迁移行为的比较研究:石英砂、沸石和无烟煤
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104395
Haicheng Liu, Yu Wen, Jingkun Xu

Microplastics (MPs) are emerging contaminants that are attracting increasing interest from researchers, and the safety of drinking water is greatly affected by their transportation during filtration. Polystyrene (PS) was selected as a representative MPs, and three filter media (quartz sand, zeolite, and anthracite) commonly found in water plants were used. The retention patterns of PS-MPs by various filter media under various background water quality conditions were methodically investigated with the aid of DLVO theory and colloidal filtration theory. The results show that the different structures and elemental compositions of the three filter media cause them to exhibit different surface roughnesses and surface potentials. A greater surface roughness of the filter media can provide more deposition sites for PS-MPs, and the greater surface roughness of zeolite and anthracite significantly enhances their ability to inhibit the migration of PS-MPs compared with that of quartz sand. However, surface roughness is not the only factor affecting the migration of MPs. The lower absolute value of the surface potential of anthracite causes the DLVO energy between it and PS-MPs to be significantly lower than that between zeolite and PS-MPs, which results in stronger retention of PS-MPs by anthracite, which has a lower surface roughness, than zeolite, which has a higher surface roughness. The transport of PS-MPs in the medium is affected by the combination of the surface roughness of the filter media and the DLVO energy. Under the same operating conditions, the retention efficiencies of the three filter materials for PS-MPs followed the order of quartz sand < zeolite < anthracite. Additionally, the conditions of the solution markedly influenced the transport ability of PS-MPs within the simulated filter column. The transport PS-MPs in the simulated filter column decreased with increasing solution ionic strength and cation valence. Naturally, dissolved organic matter promoted the transfer of PS-MPs in the filter layer, and humic acid had a much stronger facilitating impact than fulvic acid. The study findings might offer helpful insight for improving the ability of filter units ability to retain MPs.

微塑料(MPs)是一种新出现的污染物,正引起研究人员越来越多的关注,其在过滤过程中的迁移对饮用水的安全影响很大。研究选取了聚苯乙烯(PS)作为代表性的微塑料,并使用了水厂中常见的三种过滤介质(石英砂、沸石和无烟煤)。借助 DLVO 理论和胶体过滤理论,对各种过滤介质在不同背景水质条件下截留 PS-MPs 的模式进行了系统研究。结果表明,三种过滤介质的不同结构和元素组成导致它们表现出不同的表面粗糙度和表面电位。与石英砂相比,沸石和无烟煤的表面粗糙度越大,其抑制 PS-MPs 迁移的能力就越强。然而,表面粗糙度并不是影响 MPs 迁移的唯一因素。无烟煤表面电位的绝对值较低,导致无烟煤与 PS-MPs 之间的 DLVO 能量明显低于沸石与 PS-MPs 之间的 DLVO 能量,从而导致表面粗糙度较低的无烟煤比表面粗糙度较高的沸石更能留住 PS-MPs。PS-MPs 在介质中的迁移受到过滤介质表面粗糙度和 DLVO 能量的共同影响。在相同的操作条件下,三种过滤材料对 PS-MPs 的截留效率依次为石英砂、沸石和无烟煤。此外,溶液条件对 PS-MPs 在模拟滤柱中的迁移能力也有明显影响。随着溶液离子强度和阳离子价数的增加,PS-MPs 在模拟滤柱中的迁移量减少。当然,溶解的有机物会促进 PS-MPs 在滤层中的迁移,而腐植酸的促进作用要比富勒酸大得多。研究结果可能有助于提高过滤单元截留 MPs 的能力。
{"title":"Comparative study of polystyrene microplastic transport behavior in three different filter media: Quartz sand, zeolite, and anthracite","authors":"Haicheng Liu,&nbsp;Yu Wen,&nbsp;Jingkun Xu","doi":"10.1016/j.jconhyd.2024.104395","DOIUrl":"10.1016/j.jconhyd.2024.104395","url":null,"abstract":"<div><p>Microplastics (MPs) are emerging contaminants that are attracting increasing interest from researchers, and the safety of drinking water is greatly affected by their transportation during filtration. Polystyrene (PS) was selected as a representative MPs, and three filter media (quartz sand, zeolite, and anthracite) commonly found in water plants were used. The retention patterns of PS-MPs by various filter media under various background water quality conditions were methodically investigated with the aid of DLVO theory and colloidal filtration theory. The results show that the different structures and elemental compositions of the three filter media cause them to exhibit different surface roughnesses and surface potentials. A greater surface roughness of the filter media can provide more deposition sites for PS-MPs, and the greater surface roughness of zeolite and anthracite significantly enhances their ability to inhibit the migration of PS-MPs compared with that of quartz sand. However, surface roughness is not the only factor affecting the migration of MPs. The lower absolute value of the surface potential of anthracite causes the DLVO energy between it and PS-MPs to be significantly lower than that between zeolite and PS-MPs, which results in stronger retention of PS-MPs by anthracite, which has a lower surface roughness, than zeolite, which has a higher surface roughness. The transport of PS-MPs in the medium is affected by the combination of the surface roughness of the filter media and the DLVO energy. Under the same operating conditions, the retention efficiencies of the three filter materials for PS-MPs followed the order of quartz sand &lt; zeolite &lt; anthracite. Additionally, the conditions of the solution markedly influenced the transport ability of PS-MPs within the simulated filter column. The transport PS-MPs in the simulated filter column decreased with increasing solution ionic strength and cation valence. Naturally, dissolved organic matter promoted the transfer of PS-MPs in the filter layer, and humic acid had a much stronger facilitating impact than fulvic acid. The study findings might offer helpful insight for improving the ability of filter units ability to retain MPs.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104395"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623249","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
The permeability evolution mechanism of ore-bearing strata during acid in-situ leaching of uranium: A case study of Bayanwula uranium mine in Inner Mongolia of China 酸性原地浸出铀过程中含矿地层的渗透性演化机理:中国内蒙古巴彦乌拉铀矿案例研究。
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104390
Ting He , Jinhui Liu , Bei Zhao , Huichun Gong , Zhangzhe Feng , Shiyu Liu

Uranium mainly comes from ISL of sandstone-type uranium deposits in China. The change of porosity and permeability caused by blockage of ore-bearing strata is one of the most serious problems in acid ISL of uranium. In this paper, the groundwater tracer test was carried out before and 1 year after ISL to explore the pore and permeability evolution characteristics of the ore-bearing layer during ISL. The test results showed that the leaching solution migrated along two seepage channels and the water-bearing medium was isotropic. After 1 year of ISL, the flow rate of the leaching solution decreased obviously. However, the flow rate of the leaching solution in slower channel decreased more than that in the faster channel in all directions, which was caused by the more adequate chemical reactions between the leaching solution and the minerals of the ore-bearing layer and the more corresponding precipitation in the slower channel. In addition, the flow rate along the direction of groundwater flow decreased less than that in the direction of vertical groundwater flow. This was closely related to the transformation of aquifer medium by hydrodynamic field. Initial stage of ISL, the occurrence of plugging is closely related to the precipitation-dissolution process of iron and aluminum minerals under the change of pH, which is accompanied by the continuous precipitation of gypsum.

中国的铀主要来自砂岩型铀矿床的 ISL。含矿地层堵塞引起的孔隙度和渗透率变化是酸性铀ISL最严重的问题之一。本文在 ISL 前和 ISL 后 1 年分别进行了地下水示踪试验,以探讨 ISL 过程中含矿地层的孔隙度和渗透率演变特征。试验结果表明,浸出液沿两条渗流通道迁移,含水介质呈各向同性。经过一年的 ISL 后,浸出液的流速明显下降。但是,在各个方向上,流速较慢的渗流通道中的浸出液流量比流速较快的渗流通道中的浸出液流量减少得更多,这是由于浸出液与含矿层矿物之间的化学反应更加充分,在流速较慢的渗流通道中相应的沉淀也更多。此外,沿地下水流向的流速下降幅度小于地下水垂直流向的流速下降幅度。这与水动力场对含水层介质的改造密切相关。在 ISL 初期,堵塞的发生与 pH 值变化下铁和铝矿物的沉淀-溶解过程密切相关,而这一过程伴随着石膏的不断沉淀。
{"title":"The permeability evolution mechanism of ore-bearing strata during acid in-situ leaching of uranium: A case study of Bayanwula uranium mine in Inner Mongolia of China","authors":"Ting He ,&nbsp;Jinhui Liu ,&nbsp;Bei Zhao ,&nbsp;Huichun Gong ,&nbsp;Zhangzhe Feng ,&nbsp;Shiyu Liu","doi":"10.1016/j.jconhyd.2024.104390","DOIUrl":"10.1016/j.jconhyd.2024.104390","url":null,"abstract":"<div><p>Uranium mainly comes from ISL of sandstone-type uranium deposits in China. The change of porosity and permeability caused by blockage of ore-bearing strata is one of the most serious problems in acid ISL of uranium. In this paper, the groundwater tracer test was carried out before and 1 year after ISL to explore the pore and permeability evolution characteristics of the ore-bearing layer during ISL. The test results showed that the leaching solution migrated along two seepage channels and the water-bearing medium was isotropic. After 1 year of ISL, the flow rate of the leaching solution decreased obviously. However, the flow rate of the leaching solution in slower channel decreased more than that in the faster channel in all directions, which was caused by the more adequate chemical reactions between the leaching solution and the minerals of the ore-bearing layer and the more corresponding precipitation in the slower channel. In addition, the flow rate along the direction of groundwater flow decreased less than that in the direction of vertical groundwater flow. This was closely related to the transformation of aquifer medium by hydrodynamic field. Initial stage of ISL, the occurrence of plugging is closely related to the precipitation-dissolution process of iron and aluminum minerals under the change of pH, which is accompanied by the continuous precipitation of gypsum.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104390"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141498194","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
Examining chlorophyll-a concentrations in tropical reservoirs under various land use changes using Sentinel – 2 and Google Earth engine – Bhadra and Tungabhadra, India 利用哨兵 2 号和谷歌地球引擎研究不同土地利用变化下热带水库的叶绿素-a 浓度--印度巴德拉和通加巴德拉。
IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-07-01 DOI: 10.1016/j.jconhyd.2024.104388
Avantika Latwal, Tarun Kondraju, Shaik Rehana, K.S. Rajan

The understanding of spatio-temporal variation in land use and land cover (LULC) patterns is crucial for managing catchment land use planning, as it directly influences of tropical reservoir water quality and the subsequent Nutrient Contamination (NC) of unmonitored water bodies. The current research attempts to accurately measure the influence of LULC and its associated determinants on the quantities of NC loads by using Chl-a as a proxy, within tropical reservoirs, i.e. Bhadra and Tungabhadra, located in same river catchment. This Chl-a spread calculated by the Maximum Chlorophyll Index (MCI) derived from Sentinel 2 satellite data products covering the period from July 2016 to June 2021 were done using Google Earth Engine (GEE) platform. The validation analysis confirms the robustness of the methodology with a strong correlation between MCI-calculated values and EOMAP (Earth Observation and Environmental Services Mapping) Chl-a (μg/L) data points for both reservoirs, Bhadra (R2 = 0.64) and Tungabhadra (R2 = 0.68). The findings reveal that, Tungabhadra reservoir consistently exhibits an excessive spatial distribution of Chl-a spread area (17 km2 to 335 km2), reflecting nutrient-rich water inflows, particularly evident during the post-monsoon period. This notable rise could be linked to harvesting the Kharif crop, resulting in elevated nutrient concentrations. In contrast Bhadra reservoir, dominated by forested areas, maintains relatively lower Chl-a spread areas (<20 km2), highlighting its pivotal role in maintaining water cleanliness and serves as a riparian boundary. In addition, the changes in LULC classes show a strong relationship with variation in Chl-a during the studied period, for the Bhadra Reservoir R2 = 0.51 (F- statistics = 3.983, p = 0.021), and the Tungabhadra Reservoir R2 = 0.802 (F- statistics = 7.489, p = 0.0143). This highlights how changes in land use significantly shape contamination dynamics, deepening our understanding of nutrient inputs and contamination drivers in tropical reservoirs.

了解土地利用和土地覆盖(LULC)模式的时空变化对于管理流域土地利用规划至关重要,因为它直接影响热带水库的水质以及随后未监测水体的营养污染(NC)。目前的研究试图通过使用 Chl-a 作为热带水库(即位于同一流域的 Bhadra 和 Tungabhadra 水库)内的替代物,准确测量 LULC 及其相关决定因素对 NC 负荷量的影响。该 Chl-a 分布是利用谷歌地球引擎(GEE)平台,通过 "哨兵 2 号 "卫星数据产品得出的最大叶绿素指数(MCI)计算得出的,时间跨度为 2016 年 7 月至 2021 年 6 月。验证分析证实了该方法的稳健性,在巴德拉(R2 = 0.64)和通加巴德拉(R2 = 0.68)两座水库中,MCI 计算值与 EOMAP(地球观测与环境服务绘图)Chl-a(微克/升)数据点之间具有很强的相关性。研究结果表明,通加巴德拉水库的 Chl-a 分布面积(17 平方公里至 335 平方公里)一直过大,反映了富营养化水流的流入,这在季风后时期尤为明显。这一显著上升可能与收割 Kharif 作物有关,导致营养物质浓度升高。相比之下,以林区为主的巴德拉水库则保持了相对较低的 Chl-a 分布区(2),这突出表明了其在保持水体清洁方面的关键作用,并起到了河岸边界的作用。此外,在研究期间,土地利用、土地利用变化(LULC)等级的变化与 Chl-a 的变化关系密切,Bhadra 水库的 R2 = 0.51(F 统计量 = 3.983,p = 0.021),Tungabhadra 水库的 R2 = 0.802(F 统计量 = 7.489,p = 0.0143)。这突显了土地利用的变化如何显著影响污染动态,加深了我们对热带水库营养物质输入和污染驱动因素的理解。
{"title":"Examining chlorophyll-a concentrations in tropical reservoirs under various land use changes using Sentinel – 2 and Google Earth engine – Bhadra and Tungabhadra, India","authors":"Avantika Latwal,&nbsp;Tarun Kondraju,&nbsp;Shaik Rehana,&nbsp;K.S. Rajan","doi":"10.1016/j.jconhyd.2024.104388","DOIUrl":"10.1016/j.jconhyd.2024.104388","url":null,"abstract":"<div><p>The understanding of spatio-temporal variation in land use and land cover (LULC) patterns is crucial for managing catchment land use planning, as it directly influences of tropical reservoir water quality and the subsequent Nutrient Contamination (NC) of unmonitored water bodies. The current research attempts to accurately measure the influence of LULC and its associated determinants on the quantities of NC loads by using Chl-a as a proxy, within tropical reservoirs, i.e. Bhadra and Tungabhadra, located in same river catchment. This Chl-a spread calculated by the Maximum Chlorophyll Index (MCI) derived from Sentinel 2 satellite data products covering the period from July 2016 to June 2021 were done using Google Earth Engine (GEE) platform. The validation analysis confirms the robustness of the methodology with a strong correlation between MCI-calculated values and EOMAP (Earth Observation and Environmental Services Mapping) Chl-a (μg/L) data points for both reservoirs, Bhadra (R<sup>2</sup> = 0.64) and Tungabhadra (R<sup>2</sup> = 0.68). The findings reveal that, Tungabhadra reservoir consistently exhibits an excessive spatial distribution of Chl-a spread area (17 km<sup>2</sup> to 335 km<sup>2</sup>), reflecting nutrient-rich water inflows, particularly evident during the post-monsoon period. This notable rise could be linked to harvesting the Kharif crop, resulting in elevated nutrient concentrations. In contrast Bhadra reservoir, dominated by forested areas, maintains relatively lower Chl-a spread areas (&lt;20 km<sup>2</sup>), highlighting its pivotal role in maintaining water cleanliness and serves as a riparian boundary. In addition, the changes in LULC classes show a strong relationship with variation in Chl-a during the studied period, for the Bhadra Reservoir R<sup>2</sup> = 0.51 (F- statistics = 3.983, <em>p</em> = 0.021), and the Tungabhadra Reservoir R<sup>2</sup> = 0.802 (F- statistics = 7.489, <em>p</em> = 0.0143). This highlights how changes in land use significantly shape contamination dynamics, deepening our understanding of nutrient inputs and contamination drivers in tropical reservoirs.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"265 ","pages":"Article 104388"},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141534562","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
期刊
Journal of contaminant hydrology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1