Journal of contaminant hydrology最新文献_第5页

Deciphering the spatiotemporal dynamics and source characteristics of nutrients under anthropogenic pressure in Taipu River, China 太浦江人为压力下养分时空动态及来源特征解读

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-29 DOI: 10.1016/j.jconhyd.2025.104835

Tong Wang , Jiayi Kou , Fengjunxi Chen , Yalong Li , Yaojen Tu , Yanping Duan

Surface water quality dynamics is a pivotal factor in sustainable water management. As a strategic waterway in Taihu Lake Basin (China), Taipu River plays a key role in integrating water management through flood control, water supply, and ecological preservation across Jiangsu, Zhejiang, and Shanghai. However, under evolving anthropogenic pressures, systematic studies characterizing its nutrient spatiotemporal variations and pollution drivers remain limited. In this study, the spatiotemporal (October 2020–July 2021 from upstream to downstream) distributions and source characteristics of key nutrients from Taipu River were evaluated through various water quality index methods, coupled with multi-approach source apportionment (principal component analysis and positive matrix factorization). Results indicated that the concentrations of total nitrogen (TN) and chemical oxygen demand (COD) in Taipu River gradually increased from upstream (TN: 0.9–1.2 mg L⁻¹, COD: 11.5–15.2 mg L⁻¹) to downstream (TN: 1.1–1.9 mg L⁻¹, COD:11.0–21.7 mg L⁻¹), and exceeded regulatory Class III limits in summer/winter (>1.0 mg L⁻¹) and spring/autumn (>20 mg L⁻¹), respectively. The increased TN likely resulted from nitrogen fertilizer loss due to rainfall, whereas the increase in COD is probably linked to the release of metabolic products from algae. Water contamination analyses identified a slightly-contaminated T7 site (i.e., TN = 1.51 ± 0.71 mg L⁻¹, COD = 34 ± 9.0 mg L⁻¹, exceeding Class IV), with primary contamination sources attributed to industrial activity (e.g., textile industry). For this T7 site with slight water contamination, the in-situ remediation strategies such as adding synthetic microbiomes, incorporating aquatic plants, and engineering intervention for nitrogen and COD pollution are recommended. These findings highlight the urgent requirement for targeted measures to mitigate nitrogen/COD loads, which is crucial to improve water quality and ecosystem health of the Taihu Lake Basin.

地表水质量动态是可持续水管理的关键因素。太浦江作为中国太湖流域的战略航道，在江浙沪地区的防洪、供水和生态保护等水资源管理一体化中发挥着关键作用。然而，在不断变化的人为压力下，对其养分时空变化特征和污染驱动因素的系统研究仍然有限。本研究通过多种水质指标方法，结合多方法来源解析（主成分分析和正矩阵分解），评价了太浦江主要营养物质的时空（2020年10月- 2021年7月，由上至下）分布和来源特征。结果表明：太浦江总氮（TN）和化学需氧量（COD）浓度由上游（TN: 0.9 ~ 1.2 mg L−1,COD: 11.5 ~ 15.2 mg L−1）向下游（TN: 1.1 ~ 1.9 mg L−1,COD:11.0 ~ 21.7 mg L−1）逐渐升高，并分别在夏/冬（>1.0 mg L−1）和春/秋（>20 mg L−1）超过III类标准。全氮的增加可能是由于降雨造成氮肥损失，而COD的增加可能与藻类代谢产物的释放有关。水污染分析确定了一个轻度污染的T7站点（即TN = 1.51±0.71 mg L−1,COD = 34±9.0 mg L−1，超过IV级），主要污染源归因于工业活动（如纺织工业）。对于该T7轻度水污染场地，建议采用添加合成微生物组、引入水生植物、工程干预氮和COD污染等原位修复策略。这些研究结果表明，迫切需要采取有针对性的措施减轻氮/COD负荷，这对改善太湖流域水质和生态系统健康至关重要。

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引用次数: 0

Corrigendum to ‘Magnetic biochar prepared by co-pyrolysis of sludge and organic medical solid waste for pH-universal removal of ciprofloxacin’ [Journal of Contaminant Hydrology 277 (2026) 104862] 污泥和有机医疗固体废物共热解制备磁性生物炭用于pH-universal去除环丙沙星的勘误表[j].污染水文学报277(2026)104862。

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2026-01-31 DOI: 10.1016/j.jconhyd.2026.104873

Junping Meng , Binbin Yao , Jinsheng Liang , Xinhui Duan , Xiangying Wei

引用次数: 0

Transport, retention and degradation of the urban biocides terbutryn, diuron and octylisothiazolinone and the herbicide acetochlor in urban surface-soil interfaces 城市杀菌剂terbutryn、diuron、octyliso噻唑啉酮和除草剂乙草胺在城市表层-土壤界面的迁移、滞留和降解

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-11-28 DOI: 10.1016/j.jconhyd.2025.104788

Tobias Junginger , Sylvain Payraudeau , Felicia Linke , Jens Lange , Gwenaël Imfeld

Urban biocides, including terbutryn, diuron, and octylisothiazolinone (OIT), commonly leached from facade coatings during rainfall-runoff events, can infiltrate subsurface environments through permeable urban surfaces, posing a risk to groundwater quality. Despite frequent detection of biocides in urban groundwater, the transport and transformation processes occurring at the surface-soil interface remain insufficiently characterized. This study combines outdoor lysimeter experiments with reactive transport modeling and compound-specific isotope analysis (CSIA) to assess biocide leaching, retention, and degradation across three typical urban interfaces: gravel strips, permeable pavements, and vegetated soils. Leaching of biocides differed among lysimeters, with 10–17 % of terbutryn, 40–47 % of acetochlor, and 5–40 % of diuron released from the gravel and pavement systems, whereas leaching from vegetated soil was minimal (<0.5 %). OIT was not detected in any leachates, likely due to rapid degradation. Eight-year modeling further indicated limited retention in gravel and pavement, with up to 36 % and 22 % of the applied terbutryn mass, respectively, migrating to depths greater than 30 cm. In contrast, vegetated soils retained over 99 % of terbutryn mass, primarily through sorption and biodegradation. CSIA indicated higher biodegradation rates in pavements than in gravel. Measurements and modeling showed substantial transformation of terbutryn into transformation products. These results underscore the critical role of biogeochemical processes at surface–soil interfaces in regulating biocide transport to groundwater. Permeable, non-vegetated surfaces receiving facade runoff were identified as significant contributors to subsurface contamination. The study highlights the limited and variable retention capacity of different urban surfaces and stresses the need to integrate biocide control into sustainable stormwater management practices.

城市杀菌剂，包括terbutryn、diuron和octyliso噻唑啉酮（OIT），通常在降雨径流事件中从立面涂层中浸出，可以通过可渗透的城市表面渗透到地下环境中，对地下水质量构成威胁。尽管在城市地下水中经常检测到杀菌剂，但在地表-土壤界面发生的运输和转化过程仍然没有充分表征。本研究将室外渗滤仪实验与反应迁移模型和化合物特异性同位素分析（CSIA）相结合，以评估三种典型城市界面：砾石带、透水路面和植被土壤中的杀菌剂淋滤、滞留和降解。杀菌剂的浸出在不同的溶出仪中有所不同，从砾石和路面系统中释放出10 - 17%的terbutryn， 40 - 47%的乙草胺和5 - 40%的diuron，而从植被土壤中释放的浸出很少（< 0.5%）。在任何渗滤液中未检测到OIT，可能是由于快速降解。8年的模型进一步表明，在砾石和路面上的保留率有限，分别高达36%和22%的施用terbutryn质量迁移到大于30厘米的深度。相比之下，植被土壤主要通过吸附和生物降解保留了99%以上的特布灵质量。CSIA表明，路面的生物降解率高于砾石。测量和建模显示了特布特灵转化为转化产物的实质性转化。这些结果强调了地表-土壤界面生物地球化学过程在调节杀菌剂向地下水运移中的关键作用。接收立面径流的可渗透、非植被表面被认为是造成地下污染的重要因素。该研究强调了不同城市表面的有限和可变的保留能力，并强调需要将杀菌剂控制纳入可持续的雨水管理实践。

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引用次数: 0

Characteristics of polycyclic aromatic hydrocarbons along an urban river in snowmelt and non-snowmelt periods from Northeast China 东北城市河流融雪期和非融雪期多环芳烃特征

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.jconhyd.2025.104828

TeRi GeLe , Kaijun Lu , Zucheng Wang , Shasha Liu , Ziping Liu

The polycyclic aromatic hydrocarbons (PAH) concentrations along an urban river from Northeast China were investigated during snowmelt and non-snowmelt periods. The results showed that the concentration of dissolved PAHs in the samples collected during the snowmelt period ranged from 61 to 271 ng L⁻¹, significantly lower than those in the non-snowmelt period, which ranged from 141 to 833 ng L⁻¹ (p < 0.05). The highest PAH concentrations in river were generally observed at municipal sewage treatment outlet. PAH concentrations were positively correlated with SUVA₂₅₄ value (p < 0.01) and negatively correlated with dissolved organic carbon (DOC), total nitrogen (TN), and total phosphorus (TP) (p < 0.01). PAH concentration increased from the upstream suburbs to urban areas, and downstream suburbs in snowmelt period, whereas an opposite trend was observed during non-snowmelt periods. These findings indicate that different factors control PAH concentration distribution along the urban river during two periods. However, despite the spatial distribution pattern of PAHs along the upstream-downstream gradient changing due to snowmelt, the overall PAH levels during snowmelt were not higher than those observed in the non-snowmelt period. This study implies that snowmelt may not always rapidly increase PAH concentrations in aquatic environment, especially in urban rivers.

对东北某城市河流在融雪期和非融雪期的多环芳烃（PAH）浓度进行了研究。结果表明：融雪期样品中溶解多环芳烃的浓度为61 ~ 271 ng L-1，显著低于非融雪期样品的141 ~ 833 ng L-1 （p 254值）

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引用次数: 0

Evaluation of key control factors on pollutant migration by suspended cutoff walls in contaminated sites 污染场地悬浮截流墙对污染物迁移的关键控制因素评价

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2026-01-23 DOI: 10.1016/j.jconhyd.2026.104867

Honghan Dong , Yun-Min Chen , Wenjie Xu

This study develops a two-dimensional numerical model for seepage and pollutant transport in sites with suspended cutoff walls, grounded in the advection–dispersion equation. The impacts of key factors, including the pressure head of the pollution source, the site's horizontal hydraulic gradient, and the horizontal distance between the downstream wall and the pollution source, on the non-linear seepage distribution and the wall's anti-pollution performance were investigated. Centrifuge model tests were conducted to confirm the numerical model's dependability. Furthermore, the concentration at the downstream wall bottom reaching 10% C₀ was established as the threshold for identifying the suspended containment system's failure. The research findings demonstrate that modifications to the site flow field due to parameter changes are a significant factor contributing to the macroscopic variations in pollutant migration. As the pressure head of the pollution source diminishes from 1.2 m to 0.3 m, the peak flow velocity at the mid-point of the liner bottom reduces by 25.6%, while the service life of the wall extends by 51.1%. The site flow-field distribution is significantly impacted, with the wall's service life increasing by 209.1% and 22.8%, respectively, as the site's horizontal hydraulic gradient decreases from 0.04 to 0.01 and the horizontal distance between the downstream wall and the pollution source increases from 4 m to 16 m. Therefore, the design of suspended cutoff walls in risk control of contaminated sites with deeply buried aquitards should focus on aspects related to these three factors.

本研究建立了一个基于平流-弥散方程的具有悬空截流墙场地渗流和污染物运移的二维数值模型。研究了污染源压头、场地水平水力梯度、下游墙与污染源水平距离等关键因素对非线性渗流分布和墙抗污染性能的影响。通过离心模型试验验证了数值模型的可靠性。并将下游壁底浓度达到10% C0作为悬置安全壳系统失效的识别阈值。研究结果表明，参数变化对现场流场的影响是造成污染物迁移宏观变化的重要因素。当污染源压头从1.2 m减小到0.3 m时，衬管底部中点峰值流速降低25.6%，壁寿命延长51.1%。随着场地水平水力梯度从0.04减小到0.01，下游墙与污染源的水平距离从4 m增加到16 m，对场地流场分布产生了显著影响，墙的使用寿命分别增加了209.1%和22.8%。因此，深埋输水污染场地风险控制中的悬式防渗墙设计应重点考虑这三个因素的相关方面。

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引用次数: 0

Spatiotemporal assessment of toxic metals in total suspanded matter and surface sediments of Borçka Reservoir (Türkiye): Tracing pollution and ecological risk implications borka水库（trkiye）总悬浮物和表层沉积物中有毒金属的时空评价：追踪污染和生态风险影响

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-15 DOI: 10.1016/j.jconhyd.2025.104814

Koray Özşeker , Yahya Terzi , Coşkun Erüz

This study investigates the spatiotemporal variations of toxic metals (Cu, Pb, Zn, Ni, As) in both suspended particulate matter (SPM) and surface sediments of the Borçka Reservoir (Türkiye) to trace pollution dynamics and evaluate ecological risks. The Borçka Reservoir, located in the southeastern Black Sea basin, is an ecologically and hydrologically important freshwater system affected by intensive human activities. Seasonal sampling was performed at four representative stations throughout 2023. The highest metal enrichment was observed in the upstream region, particularly during autumn, indicating the influence of inflowing waters from the Murgul Stream, a major tributary draining mining areas and discharging into the reservoir. Maximum sediment concentrations reached 446.5 μg/g for Cu, 170.7 μg/g for Pb, and 356.33 μ/kg for Zn, exceeding the Probable Effect Level (PEL; Cu: 197, Pb: 91.3, Zn: 315 μg/g) and Effect Range Median (ERM; Cu: 270, Pb: 218, Zn: 410 μg/g) thresholds of sediment quality guidelines. Enrichment and contamination factors classified Cu as “extremely severe” (class 6), while ecological risk (Er) and toxic risk (TRI) values revealed moderate to considerable risks for Cu and Pb. In SPM, metals also showed autumnal peaks. Physicochemical parameters (pH: 8.17–8.53; TOC: 0.52–0.93%) strongly influenced metal retention. The integrated assessment highlights spatiotemporal heterogeneity of metal pollution and emphasizes the need for continuous monitoring and source-based management strategies for sustainable reservoir ecosystems.

研究了borka水库（trkiye）悬浮颗粒物（SPM）和表层沉积物中有毒金属（Cu、Pb、Zn、Ni、As）的时空变化规律，以追踪污染动态并评价生态风险。borka水库位于黑海盆地东南部，是一个受人类活动强烈影响的重要的生态和水文淡水系统。整个2023年在四个代表性站点进行了季节性采样。在上游地区观察到最高的金属富集，特别是在秋季，这表明来自穆尔古尔河的流入水的影响，穆尔古尔河是一条主要支流，为矿区排水并排入水库。最大沉积物浓度Cu为446.5 μg/g， Pb为170.7 μg/g， Zn为356.33 μ/kg，超过了沉积物质量指南的可能影响水平（PEL; Cu: 197, Pb: 91.3, Zn: 315 μg/g）和影响范围中位数（ERM; Cu: 270, Pb: 218, Zn: 410 μg/g）阈值。富集和污染因子将Cu列为“极严重”（6级），而生态风险（Er）和毒性风险（TRI）值显示Cu和Pb的中度至相当风险。在SPM中，金属也出现了秋季峰值。理化参数（pH: 8.17-8.53; TOC: 0.52-0.93%）强烈影响金属的保留。综合评价强调了金属污染的时空异质性，强调了对可持续水库生态系统进行持续监测和基于源头的管理战略的必要性。

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引用次数: 0

Explainable advanced modelling of interfacial tension in H2 – CO2 – CH4 – brine systems for sustainable subsurface storage in saline aquifer 可解释的H2 - CO2 - CH4 -盐水系统界面张力的先进模型，用于盐酸盐含水层的可持续地下储存。

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-24 DOI: 10.1016/j.jconhyd.2025.104827

Saad Alatefi , Okorie Ekwe Agwu , Menad Nait Amar , Ahmad Alkouh

Hydrogen is increasingly recognized as a pillar of future low-carbon energy systems, offering flexibility across multiple sectors and contributing to deep decarbonization goals. To enable large-scale deployment, Underground Hydrogen Storage (UHS) in geological formations such as saline aquifers is gaining considerable attention as a strategic option for ensuring secure and scalable energy reserves. The safety, efficiency, and operational success of UHS heavily depend on accurately determining interfacial tension (IFT) between hydrogen/cushion gas and the in-situ brine, as this parameter governs several critical phenomena related to storage performance. This study aims to develop a reliable and explainable machine learning framework to predict IFT in H₂/cushion gas–brine systems across diverse thermodynamic and compositional conditions. Two input schemes were explored: the first included nine variables covering detailed salt composition, pressure, temperature, and the presence of cushion gas (represented by average critical temperature, T_cm); the second used a simplified set of four inputs, namely equivalent salinity, pressure, temperature, and T_cm. A curated database of approximately 500 experimentally measured IFT data points was employed to train and validate three models: radial basis function neural network (RBFNN), generalized regression neural network (GRNN), and categorical boosting (CatBoost). Among these, the CatBoost-based model under the simplified scheme achieved the highest predictive accuracy (R² = 0.9979, RMSE = 0.5136 mN/m), with excellent physical consistency and generalization. Trend analysis confirmed the model's ability to replicate expected IFT behavior under varying conditions. Comparative benchmarking showed that the CatBoost model outperformed several state-of-the-art models from the literature. A leverage-based applicability domain analysis revealed that 97 % of the data points fall within acceptable influence and residual bounds, confirming robustness. Beyond accuracy, the model is highly interpretable globally and locally using SHAP and LIME techniques, making it suitable for real-time deployment in UHS operations to support safe injection design and long-term storage reliability.

氢越来越被认为是未来低碳能源系统的支柱，它为多个部门提供了灵活性，并有助于实现深度脱碳目标。为了实现大规模部署，地下储氢（UHS）作为一种确保安全和可扩展的能源储备的战略选择，在咸水含水层等地质构造中得到了相当大的关注。UHS的安全性、效率和操作成功在很大程度上取决于氢气/缓冲气体与原位盐水之间的界面张力（IFT）的准确测定，因为该参数控制着与储存性能相关的几个关键现象。本研究旨在开发一种可靠且可解释的机器学习框架，以预测不同热力学和成分条件下H2/缓冲气-盐水系统中的IFT。研究人员探索了两种输入方案：第一种包括9个变量，包括详细的盐成分、压力、温度和缓冲气体的存在（用平均临界温度Tcm表示）；第二种使用了一组简化的四个输入，即等效盐度、压力、温度和Tcm。一个由大约500个实验测量的IFT数据点组成的数据库被用来训练和验证三种模型：径向基函数神经网络（RBFNN）、广义回归神经网络（GRNN）和分类增强（CatBoost）。其中，简化方案下基于catboost的模型预测精度最高（R2 = 0.9979, RMSE = 0.5136 mN/m），具有良好的物理一致性和泛化性。趋势分析证实了该模型在不同条件下复制预期IFT行为的能力。比较基准测试表明，CatBoost模型优于文献中的几个最先进的模型。基于杠杆的适用性域分析显示，97%的数据点落在可接受的影响和残差范围内，证实了鲁棒性。除了准确性之外，该模型在全球和本地都具有高度的可解释性，使用SHAP和LIME技术，使其适合于UHS作业的实时部署，以支持安全注入设计和长期存储可靠性。

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引用次数: 0

Response of microplastic color to photoaging and its influence on the release characteristics of derived dissolved organic matters 微塑料颜色对光老化的响应及其对衍生溶解有机质释放特性的影响。

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2026-01-09 DOI: 10.1016/j.jconhyd.2026.104849

Maocai Shen , Shiwei Liu , Haokai Li , Ruixin Jin

This study systematically investigated the regulatory mechanisms of color parameters on the photoaging behavior and ecological effects of polypropylene (PP) and polymethylmethacrylate (PMMA). We revealed the evolution of the physicochemical properties of various colored microplastics. These results indicate that red and yellow microplastics significantly accelerated surface oxidation and chain breakage due to their strong ultraviolet absorption properties (long wavelength of 380–420 nm). This led to an increase in specific surface area, exemplified by a 10.8% increase in the crystallinity of red PP, an enhancement in surface roughness characterized by dense cracks on the surface of red PMMA, and a greater release of dissolved organic matter (MPs-DOM). DOM components exhibited color dependence, with the red group displaying the highest peak fluorescence intensity. PMMA was primarily composed of humic acids (Ex/Im = 240–250/420–425 nm), while PP released polycyclic aromatic hydrocarbons (Ex/Im = 220–225/305–310 nm). Biological toxicity experiments demonstrated that PMMA-DOM aged for 30 days significantly inhibited the germination rate of Chinese cabbage seeds, averaging 92%. Red PP-DOM promoted a 22.7% increase in seed wet weight during the early stage (10 d). However, long-term exposure (90 days) inhibited the activities of superoxide dismutase (SOD) and catalase (CAT) due to the accumulation of free radicals. Further research has shown that green microplastics exhibit weaker light absorption capabilities and lower toxicity effects related to DOM. This study elucidates the mechanism by which color influences the environmental fate of microplastics through their photoresponsive properties, providing a theoretical foundation for microplastic control strategies based on pigment photosensitivity.

本研究系统地研究了颜色参数对聚丙烯（PP）和聚甲基丙烯酸甲酯（PMMA）光老化行为和生态效应的调控机制。揭示了各种有色微塑料理化性质的演变过程。结果表明，红色和黄色微塑料具有较强的紫外吸收特性（长波380 ~ 420 nm），可显著加速表面氧化和链断裂。这导致了比表面积的增加，例如，红色PP的结晶度增加了10.8%，表面粗糙度增强，其特征是红色PMMA表面有密集的裂缝，溶解有机物（MPs-DOM）的释放量增加。DOM组分具有颜色依赖性，红色组荧光强度峰值最高。PMMA主要由腐植酸组成（Ex/Im = 240 ~ 250/420 ~ 425 nm）， PP主要由多环芳烃组成（Ex/Im = 220 ~ 225/305 ~ 310 nm）。生物毒性试验表明，PMMA-DOM陈化30 d显著抑制大白菜种子发芽率，平均为92%。红PP-DOM在前期（10 d）促进种子湿重增加22.7%。然而，长期暴露（90天）由于自由基的积累，抑制了超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的活性。进一步研究表明，绿色微塑料的光吸收能力较弱，对DOM的毒性作用较低。本研究阐明了颜色通过光敏性影响微塑料环境命运的机制，为基于色素光敏性的微塑料控制策略提供了理论基础。

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引用次数: 0

Seasonal variability in the hydrogeochemical behavior and metal fluxes of acid mine drainage: Implications for long-term output and treatment 酸性矿井水的水文地球化学行为和金属通量的季节变化：对长期产出和处理的影响

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-17 DOI: 10.1016/j.jconhyd.2025.104818

David M. Singer, Rachel Izworski, Annika Dudik, Allyson C. Tessin

The timeframe for when water quality impairment from acid mine drainage (AMD) from abandoned coal mines might end is often poorly constrained. The response of AMD composition to changes in discharge can provide insight into how mines store and release water and solutes. This work aimed to determine seasonal variability, hydrogeochemical behavior, and metal fluxes from two abandoned coal mines in Appalachian Ohio that represent end-member hydrologic conditions within the Huff Run (HR, groundwater-fed) and Yellow Creek (YC, surface water-fed) watersheds, by: (1) monitoring AMD output to establish seasonal variability; (2) comparing current output to publicly available historical data; and (3) linking metal loadings in the AMD from each mine to characteristics of the coal and abandoned mine works. The HR AMD was dominated by chemostasis (“pipe-full”), whereas the YC AMD was dominated by dilution (“not pipe-full”). For HR, the combination of continuously flooded mineworks recharged primarily by groundwater combined with the presence of fine-grained, diffusely disseminated pyrite in the host rock results in slower AMD production, although shorter timeframe for water quality impairment (decades) given current conditions. In contrast, the faster pace of YC AMD depletion is likely due to the combination of pseudokarstic flow conditions fed by surface water with large, seasonal pulses of dissolved metals from the weathering of coarse-grained aggregates of pyrite but a longer timeframe for AMD impairment to cease (decades to centuries). These results highlight the importance of establishing how the combination of local and regional conditions influence the timeframe for on-going AMD production.

废弃煤矿酸性矿井水（AMD）造成的水质损害何时可能结束的时间框架往往缺乏约束。AMD成分对排放变化的响应可以深入了解矿山如何储存和释放水和溶质。本研究旨在确定俄亥俄州阿巴拉契亚两个废弃煤矿的季节变化、水文地球化学行为和金属通量，这些煤矿代表了Huff Run （HR，地下水）和Yellow Creek （YC，地表水）流域的末端水文条件，方法如下：(1)监测AMD输出以建立季节变化；(2)将当前产出与公开可用的历史数据进行比较；(3)将各矿山矿山中金属的含量与煤炭和废弃矿山的特点联系起来。HR型AMD以化学平衡（“满管”）为主，而YC型AMD以稀释（“不满管”）为主。对于HR来说，持续被水淹没的矿山主要由地下水补给，再加上在宿主岩石中存在细粒、弥散分布的黄铁矿，导致AMD的生产速度较慢，尽管在目前的条件下，水质损害的时间较短（几十年）。相比之下，YC AMD消耗的速度更快可能是由于地表水提供的假岩溶流条件与来自粗粒黄铁矿集合体风化的溶解金属的大量季节性脉冲相结合，但AMD损害停止的时间较长（数十年至数百年）。这些结果突出了确定当地和区域条件如何结合影响正在进行的AMD生产的时间框架的重要性。

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引用次数: 0

Research on the carbon cycle of surface water-groundwater in the Jianghan Dongting Plain of the Yangtze River Basin, China 长江流域江汉洞庭平原地表水-地下水碳循环研究

IF 4.4 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology

Pub Date : 2026-02-01 Epub Date: 2025-12-17 DOI: 10.1016/j.jconhyd.2025.104812

Meiyan Hu , Peijiang Zhou , Chao Meng , Xiaobin Li , Xiaoxi Chen , Jingyi Xie , Shengkai Cao , Xiaodi Zhang , Zhen Ni , Guangshui Na

Carbon cycle research is the core foundation for understanding the root causes of climate change and developing effective emission reduction strategies. Carbon source-sink dynamics in the water ecologic environment is the key component of the carbon cycle in basins. Jianghan Dongting Plain of the Yangtze River Basin is rich in water resources, but lacks a comprehensive understanding on the carbon source-sink dynamics of water environment. The study integrated literature data and self-tested data to research the carbon source-sink dynamics in surface water and groundwater in the Jianghan Dongting Plain. The study found that there was a coupling effect of HCO₃⁻ and DOC between SW (surface water) and GW (groundwater) in the Jianghan-Dongting Plain of the central Yangtze River Basin. The HCO₃⁻ in surface water may come from the recharge of groundwater, and the DOC in the groundwater may come from the recharge of surface water. In addition, the high concentration of NH₄⁺-N in groundwater inhibited the release of DOC from the sediment into the groundwater. Decreasing of situation index (SI) values of calcite and dolomite from west to east indicated that under the coupling effect between surface water and groundwater, the water carbonate interaction was enhanced, leading to the carbon sink changing to be carbon source from west to east. The study clarified the spatial pattern of regional carbon effects of “ west sink and east source” for the first time, elevating carbon cycle research from a single water body to a system level of “surface water groundwater continuum”, successfully connecting micro biogeochemical processes with macro regional carbon cycle patterns, which is of great significance for carbon cycling research in the Yangtze River Basin and predicting future environmental changes.

碳循环研究是认识气候变化的根本原因，制定有效减排战略的核心基础。水生态环境中的碳源汇动态是流域碳循环的关键组成部分。长江流域江汉洞庭平原水资源丰富，但缺乏对水环境碳源汇动态的全面认识。本研究结合文献资料和自检资料，对江汉洞庭平原地表水和地下水碳源汇动态进行了研究。研究发现，长江流域中部江汉—洞庭平原地表水SW与地下水GW之间存在HCO3−与DOC的耦合效应。地表水中的HCO3−可能来自地下水的补给，地下水中的DOC可能来自地表水的补给。此外，地下水中高浓度的NH4+-N抑制了沉积物中DOC向地下水的释放。方解石和白云岩的SI值自西向东递减，说明在地表水和地下水的耦合作用下，水-碳酸盐相互作用增强，导致碳汇自西向东转变为碳源。该研究首次明确了“西汇东源”区域碳效应的空间格局，将碳循环研究从单一水体提升到“地表水-地下水连续体”的系统层面，成功地将微观生物地球化学过程与宏观区域碳循环格局联系起来，对长江流域碳循环研究和预测未来环境变化具有重要意义。

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