Journal of contaminant hydrology最新文献

{"title":"Ecotoxicological Effects of Nanoplastic and Microplastic Polystyrene Particles on Hyalella azteca: A Comprehensive Study on the Impact of Physical and Chemical Surface Properties","authors":"Agnieszka Dąbrowska ,&nbsp;Evita Strode ,&nbsp;Łukasz Kurach ,&nbsp;Marcin Stachowicz","doi":"10.1016/j.jconhyd.2025.104574","DOIUrl":"10.1016/j.jconhyd.2025.104574","url":null,"abstract":"<div><div>The ecotoxicological effects of nanoplastic (NPs) and microplastic (MPs) polystyrene particles' (PS) on <em>Hyalella azteca</em> were studied in three tests designed to investigate various hypotheses and explore potential mechanisms of interaction between MPs, NPs and this species. The following materials were used: fluorescent nanoplastic nanoPS of 15–18 nm diameter, non-modified nanoPS 25 nm, and functionalized (aminometyl)polystyrene (PS-NH₂). Short-term exposure of 7 and 14 days, and long-term exposure of 42 days, were conducted using three different types of PS at varying concentrations (0.01, 0.18, 1, 18, 180 mg L⁻¹). The experiments were carried out through two methods: PS introduced via food and PS dispersed in the environment (referred to as the “medium”). The effects were comprehensively assessed by measuring the activity of selected oxidative stress biomarkers (acetylcholinesterase AChE, catalase CAT, and glutathione s-transferase GST), and monitoring parameters such as size, growth, reproduction rate, and the presence of possible malformations. The statistically significant effect was observed with PS-NH₂ (37–74 μm) and fluorescent nanoPS (15–18 nm), whereas nanoPS of 25 nm were nearly inert. The discussion is focused on four observed aspects: (i) the impact of the surface characteristics and functional group modifications of PS particles on their overall effect on biota, (ii) the limitations of using a typical concentration parameter for tests comparison, with a proposal to adopt total surface area of MPs and NPs instead – reflecting the overall surface exposed to the environment, rather than solely relying on the mass or volume, (iii) the influence of feeding regimen (exposure at varying concentrations in food or medium compared to no exposure) on the ecotoxicological effect, and (iv) the potential of <em>Hyalella azteca</em> as a sentinel species for monitoring microplastic transport in both freshwater and brackish waters environments. Finally, the physical and chemical properties of all three PS types were characterized to better understand their mutual interaction with biota from the material perspective.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104574"},"PeriodicalIF":3.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854803","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}

{"title":"Tracking the microplastic pollution in the freshwater environments of southeastern Türkiye: Usage of Unio delicatus, Unio Terminalis and Dreissena polymorpha as bioindicators of microplastics","authors":"Nebil Yücel,&nbsp;Ece Kılıç,&nbsp;Hülya Şereflişan","doi":"10.1016/j.jconhyd.2025.104577","DOIUrl":"10.1016/j.jconhyd.2025.104577","url":null,"abstract":"<div><div>Microplastic (MP) pollution levels in aquatic environments raise concerns regarding the potential harm to biota and the environment. Mussel species are categorized as perfect bioindicator of pollutants due to their sessile lifestyle, and filter-feeding activity that also make them more prone to microplastic contamination. This study was designed to assess microplastic pollution levels in the soft tissues of dominant freshwater mussel species to understand general picture in microplastic contamination of the ambient environment. For that purpose, microplastic presence in the soft tissue of <em>Unio delicatus (n:49), Unio Terminalis (n:31)</em> and <em>Dreissena polymorpha (n:82)</em> was investigated. Including all examined specimens, mean microplastic abundance was found as 0.6 ± 0.8 items/ind, 0.2 ± 0.5 items/g ww with occurrence rate of 48 %. Reflecting global distribution, general morphological characteristics of MPs were fiber shape, blue colored and less than 500 μm in size. Fourier transform infrared (FTIR) spectroscopy identified the polymer type of MPs as polyethylene (40 %), polypropylene (47 %), and polystyrene (27 %). The results obtained in this study provide baseline information regarding microplastic contamination in freshwater environments and emphasize the need of protective measures.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104577"},"PeriodicalIF":3.5,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838304","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}

{"title":"Characterization of environmental dispersion in two-layer wetland flow under the effect of wind and ecological degradation","authors":"Buddhadeb Mondal ,&nbsp;Krishnendu Barman ,&nbsp;Bijoy S. Mazumder","doi":"10.1016/j.jconhyd.2025.104568","DOIUrl":"10.1016/j.jconhyd.2025.104568","url":null,"abstract":"<div><div>Flow and environmental dispersion are crucial to control biodiversity and to manage ecosystem and water resources. Present study presents a dispersion model for a pollutant transport in two-layer wetland flow under the surface-wind along with second-degree degradation effect using multi-scale homogenization technique. The novelty of this paper is to characterize action of the mean concentration subject to wind and second-degree degradation effect. An increase in positive wind direction results in a larger involvement of conveyance capacity in wetland flows, leading to an enlargement of the depth-averaged mean velocity. An analytical solution for the mean concentration along the vertical direction and the maximal area of the region influenced by pollutant transport requires considering hydraulic dispersion and ecological degradation. As a results, it is seen that the pollutant reduces vertically throughout the wetland as the degradation increases. Also, this study uses a depth-averaged function and dimensionless parameters to show the maximal area and duration of the region impacted by the steady-state transport of pollutants under the influence of wind. Furthermore, for the typical structure of contaminant constituent <em>Pb</em>, the influenced duration of the region and maximal area are illustrated with a certain standard water quality level in the wetland and analysed.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104568"},"PeriodicalIF":3.5,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844744","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}

{"title":"Impact of elevated temperature from water cooling system on contaminant transport in clay liners: A laboratory and numerical investigation","authors":"Vihan Jayawardane ,&nbsp;Emmanuella Stephanie Widjaja ,&nbsp;Vivi Anggraini ,&nbsp;Mehdi Mirzababaei","doi":"10.1016/j.jconhyd.2025.104572","DOIUrl":"10.1016/j.jconhyd.2025.104572","url":null,"abstract":"<div><div>In municipal solid waste landfills (MSWL), the center and peripheral regions of the basal compacted clay liner (CCL) often experience steady elevated temperatures due to waste biodegradation and cyclic temperatures similar to the seasonal atmospheric temperature patterns, respectively. In the present study, the negative effects of cyclic elevated temperatures on the desiccation behaviour of a MSWL basal CCL was examined by subjecting CCL samples to multiple wet-dry cycles with different drying temperatures. It was observed that the extent of desiccation cracking experienced by the CCL rose as the drying temperature and number of wet-dry cycles increased. The present study also assessed the effect of different thermoplastic cooling pipes on the reduction of temperature rise and desiccation experienced by CCLs exposed to constant elevated temperatures (CETs). It was observed that the introduction of thermoplastic cooling pipes led to a significant attenuation of the final temperature (FT) and desiccation magnitude along the CCL depth in the face of all applied CETs, irrespective of the cooling pipe material employed. A comprehensively analysis of the final temperature distributions within the entire CCL, coolant and sand layer surrounding the cooling pipe was also carried out via the conduction of a numerical simulation. Overall, the present study revealed the adverse effects imposed by cyclic elevated temperatures on a CCL and the potential that thermoplastic cooling pipes possess to successfully reduce the temperature rise and desiccation experienced by a CCL in the face of different CETs.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104572"},"PeriodicalIF":3.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826480","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}

{"title":"Data-driven identification of pollution sources and water quality prediction using Apriori and LSTM models: A case study in the Hanjiang River basin","authors":"Mingyang Liu,&nbsp;Jiake Li,&nbsp;Yafang Li,&nbsp;Weijie Gao,&nbsp;Jingkun Lu","doi":"10.1016/j.jconhyd.2025.104570","DOIUrl":"10.1016/j.jconhyd.2025.104570","url":null,"abstract":"<div><div>The rapid development of urbanization and industrialization has exacerbated surface water pollution, especially from point sources such as industrial discharge and urban wastewater, posing a severe challenge to global environmental health and sustainable development. This study combines the Apriori algorithm and Long Short-Term Memory (LSTM) networks to identify major pollution sources and predict dynamic changes in water quality. The study area encompasses four national monitoring hydrological stations in the core area of the South-to-North Water Diversion Project, with multi-source data collected, including water quality parameters and industry-specific discharge data. Using the Apriori algorithm, the pollutants with the highest support—chemical oxygen demand (COD), copper (Cu), suspended solids (SS), and zinc (Zn)—demonstrated a support value of 0.87, indicating that the metallurgical, electroplating, and chemical industries are the primary pollution sources. Further association rule analysis based on varying parameter thresholds revealed that when COD is present, the co-occurrence confidence for Cadmium (Cd), Cu, Lead (Pb), and SS reaches 0.9, and the combination of COD, Cu, Pb, SS, and Cyanide (CN) achieves a confidence level of 1, indicating a high degree of correlation among these pollutants. The LSTM model demonstrated high accuracy in water quality prediction, with Root Mean Square Error (RMSE) values for COD predictions at each hydrological station ranging from 0.2076 to 0.3366, and coefficients of determination (R²) all exceeding 0.9, highlighting the model's stability and predictive accuracy. This study provides a scientific basis for the sustainable management of watershed water resources and serves as a significant reference for environmental policymaking and water resource protection.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104570"},"PeriodicalIF":3.5,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826479","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}

{"title":"Microplastics and organic contaminants: Investigation of the sorption process on different polymer types","authors":"Fabiane Ferraz Wisniewski ,&nbsp;Elisandra Carolina Martins ,&nbsp;Danieli Sayuri Hakoyama ,&nbsp;Luis Fernando Amorim Batista ,&nbsp;Marco Tadeu Grassi ,&nbsp;Sonia Faria Zawadzki ,&nbsp;Gilberto Abate","doi":"10.1016/j.jconhyd.2025.104567","DOIUrl":"10.1016/j.jconhyd.2025.104567","url":null,"abstract":"<div><div>The presence of microplastics (MPs) in aquatic environments raises major concerns due to their ability to sorb and transport Emerging Contaminants (ECs). In this work, a sorption study was carried out, using MPs of polyester (PES), polyamide (PA), polyvinyl chloride (PVC), polypropylene (PP), high-density polyethylene (HDPE) and low-density polyethylene (LDPE), in the size range of 63 to 250 μm. Five emerging contaminants (ECs) were selected for this evaluation: Ametryn (AMT), atrazine (ATZ), bisphenol A (BPA), progesterone (PGT) and pyraclostrobin (PCT). The MPs were previously characterized by different analytical techniques and presented results in good agreement with the literature. Sorption experiments presented a predominance in the interaction of the most nonpolar ECs (PCT and PGT), with all six polymers. In general, under the evaluated conditions, the highest sorption percentages were obtained for: PA &gt; PP &gt; LDPE &gt; PVC &gt; HDPE &gt; PES, for 24 h of contact time, that could be considered as the apparent equilibrium time, and the increase in the mass of MPs contributed for the enhancement in the sorption process, probably due to the greater availability of interaction sites. Also, the variation in ionic strength and pH caused no significant effect between the sorption of most ECs and the MPs. The results indicate a greater interaction between MPs and nonpolar contaminants, revealing that MPs play a limited role in the transport of more polar compounds in the aquatic medium.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104567"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838305","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}

{"title":"Weathering and trace element mobilisation of MSWI bottom ash from wet and dry extraction","authors":"Philipp Ingold ,&nbsp;Gisela Weibel ,&nbsp;Patrick Kämpfer ,&nbsp;Sergey V. Churakov","doi":"10.1016/j.jconhyd.2025.104566","DOIUrl":"10.1016/j.jconhyd.2025.104566","url":null,"abstract":"<div><div>This study aims on the characteristics of occurring weathering processes of dry and wet extracted bottom ash materials and its effects on element emissions. To examine the role of initial water contact, dry bottom ash was experimentally moistened. Titration experiments were performed to elaborate buffer capacities and dissolution processes of the waste residues as a function of <em>pH</em>, and thermodynamic calculations were used to identify the solubility-controlling phases. Dry bottom ash showed highly alkaline in-situ <em>pH</em> conditions (<em>pH</em> 12.6). Continuous acid addition revealed a multi-stage process, which was characterised by the formation and dissolution of different phases across four different buffer systems, including portlandite dissolution and formation of ettringite and CSH phases in the first stage (<em>pH</em> &gt; 12.1), dissolution of ettringite and CSH phases in the second stage (<em>pH</em> 9.7–12.1), carbonate dissolution during the third stage (<em>pH</em> 5.5–9.7), and dissolution of Al- and Fe-hydroxides in the fourth stage (<em>pH</em> &lt; 5.5). Prior weathering processes in the moistened dry bottom ash and wet bottom ash resulted in a reduction of the in-situ <em>pH</em> (<em>pH</em> 12.1 and 10.3, respectively). Thermodynamic calculations suggested that phases containing Ca, S, Al, and Si were mainly responsible for the <em>pH</em> stabilisation. Emission trends as a function of <em>pH</em> generally aligned with calculated solubility curves, with dry bottom ash showing higher concentrations than wet bottom ash. Discrepancies, especially found in the dry bottom ash system, may be associated with elevated the presence of ligands (i.e., DIC, DOC), enhancing the mobility of selected elements (Al, Cu, Zn).</div></div><div><h3>Environmental implications</h3><div>Bottom ashes investigated in this study are subject to environmental contaminants and potential hazards. Their characterisation and behaviour investigated during this work provides further insight into their behaviour and highlights the enhanced leaching of dry extracted bottom ash under naturally and environmentally relevant conditions.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104566"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823881","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}

{"title":"Molecular insights into the Tl(I) binding capacity and response sequences of soil humic acids from different sources","authors":"Die Hu ,&nbsp;Wanpeng Chen ,&nbsp;Zhiheng Li ,&nbsp;Chengxue Ma ,&nbsp;Shuangrui Yang ,&nbsp;Yuheng Huang ,&nbsp;Xiaoliu Huangfu","doi":"10.1016/j.jconhyd.2025.104569","DOIUrl":"10.1016/j.jconhyd.2025.104569","url":null,"abstract":"<div><div>Humic acid (HA) significantly affects the migration, transformation, and environmental fate of Tl(I) through complexation. However, knowledge of the interaction processes and interfacial mechanisms between HA and Tl(I) remains lacking. Here, we investigated the Tl(I) binding characteristics of Sigma-HA and soil HAs from representative watersheds in China at the molecular level using adsorption models, an excitation-emission matrix with parallel factor analysis (EEM-PARAFAC), and two-dimensional correlation spectroscopy (2D-COS). According to the isothermal adsorption modeling results, SSHA exhibited the greatest attraction for Tl(I). However, YSHA exhibited the lowest value. On the one hand, the content of oxygen-containing functional groups on HAs may influence the adsorption capacity for Tl(I). On the other hand, the EEM-PARAFAC analysis results revealed that the UV humic-like component (C3), which is unique to SSHA, plays a crucial role in determining Tl(I) binding as a more effective complexing species (log K_M = 5.248). For the binding responsiveness of HAs, the 2D-COS results indicated that the carboxyl and phenolic hydroxyl groups associated with humic-like components in SSHA are the optimal structures for Tl(I) binding, whereas the polysaccharides and aliphatics in YSHA and PSHA are more sensitive. These findings increase our understanding of environmental behavior of Tl(I) and provide a solid theoretical foundation for evaluating the effectiveness of HA remediation in Tl-contaminated soils.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104569"},"PeriodicalIF":3.5,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834013","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}

{"title":"Study on the service performance of heterogeneous cutoff walls and three-dimensional transport of pollutants considering compression effect","authors":"Pengyuan Zhang ,&nbsp;Junrui Chai ,&nbsp;Jing Cao ,&nbsp;Yingcheng Zhao ,&nbsp;Zengguang Xu ,&nbsp;Yuan Qin ,&nbsp;Cheng Cao","doi":"10.1016/j.jconhyd.2025.104563","DOIUrl":"10.1016/j.jconhyd.2025.104563","url":null,"abstract":"<div><div>Vertical cutoff walls are widely used as an effective in-situ remediation technology for non-point source contaminated sites. In this study, considering the arch effect and lateral extrusion effect of the wall, a method for calculating the heterogeneous parameters of the cutoff wall is proposed based on the horizontal spring model. A three-dimensional model of unsteady pollutant transport in the unsaturated zone (internal aquifer-cutoff wall-external aquifer) is developed, incorporating the coupled convection-diffusion-adsorption-degradation processes. The research demonstrates that the shallow part of the wall is prone to forming a dominant migration channel. As the position <span><math><msub><mi>μ</mi><mn>1</mn></msub></math></span> of the peak concentration of the pollution source and the distribution range (<span><math><mi>σ</mi></math></span>) of high-concentration pollutants increase, both the breakdown time <em>t</em>_<em>b</em> and the depth <em>h</em>_<em>b</em> of the breakdown point increase. When the buried depth <em>h</em>_<em>b</em> of the breakdown point is small (with <span><math><msub><mi>μ</mi><mn>1</mn></msub></math></span> and <span><math><mi>σ</mi></math></span> also small), <em>t</em>_<em>b</em> is less affected by the wall effective angle of internal friction <span><math><msub><mi>φ</mi><mi>cw</mi></msub></math></span> and wall shear strength reduction factor <em>R</em>_<em>r</em>. Conversely, as the buried depth <em>h</em>_<em>b</em> increases (with larger values of <span><math><msub><mi>μ</mi><mn>1</mn></msub></math></span> and <span><math><mi>σ</mi></math></span>), the influence of <span><math><msub><mi>φ</mi><mi>cw</mi></msub></math></span> and <em>R</em>_<em>r</em> on <em>t</em>_<em>b</em> becomes more significant. Finally, a design method for determining the depth <em>h</em>_<em>r</em> of the shallow enhanced cutoff wall under different pollutant concentration distributions is proposed. This study offers valuable insights for evaluating cutoff wall performance, optimizing backfill mix ratios, and improving wall structure design.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104563"},"PeriodicalIF":3.5,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816365","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}

{"title":"Temperature effects for tetrachloroethylene removal with NZVI between 10 and 55 °C in flow-through column experiments","authors":"Alexander Schwardt,&nbsp;Nils Fridtjof Popp,&nbsp;Andreas Dahmke,&nbsp;Ralf Köber","doi":"10.1016/j.jconhyd.2025.104565","DOIUrl":"10.1016/j.jconhyd.2025.104565","url":null,"abstract":"<div><div>Subsurface utilization for underground thermal energy storage (UTES) in urban areas can promote a sustainable and climate-neutral heat supply. Meanwhile, frequent subsoil contamination raises the question of whether the stored heat could be used for remediation, which can benefit from increased temperatures (e.g., by increased reactivity and desorption processes or enhanced microbial degradation). We focus on nanoscale zerovalent iron (NZVI), which is suitable for chlorinated hydrocarbon remediation. However, the potential benefits or drawbacks of increased temperatures for groundwater remediation, including accelerated contaminant degradation, declining long-term reactivity, or influenced passivation processes by mineral precipitation, remain largely unexplored. Herein, we investigate the effect of temperature changes (10–55 °C) on NZVI's long-term degradation of tetrachloroethylene (PCE) using column experiments to assess the approach's suitability for coupling with UTES. Using demineralized water (DW), maximum PCE removal rates (k_PCE) between 10 and 55 °C increased from 0.13 to 2.3 h⁻¹. With tap water (TW), k_PCE increased between 10 and 40 °C from 0.18 to 0.75 h⁻¹. Due to the higher PCE removal rates in combination with increasing H₂ generation caused by enhanced anaerobic corrosion, long-term corrosion reactivity decreased between 10 and 55 °C from ∼275 to 14 d with DW and from 150 to 30 d between 10 and 40 °C with TW, whereby the increased H₂ formation is beneficial for microbial degradation. Accelerated passivation of the NZVI due to carbonate precipitation was not observed for the examined temperatures. Therefore, the experiments revealed that combining UTES with NZVI for remediation purposes is practicable, offering clear remediation advantages.</div></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"272 ","pages":"Article 104565"},"PeriodicalIF":3.5,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834014","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}