Journal of contaminant hydrology最新文献

{"title":"Cellulose-based CoFe LDH composite as a nano-adsorbent for sulfamethoxazole and cefixime residues: Evaluation of performance, green metrics and cytotoxicity","authors":"Amna A. Kotp ,&nbsp;Ahmed A. Allam ,&nbsp;Asmaa M. Salah ,&nbsp;W. Kamal ,&nbsp;Doaa Essam ,&nbsp;Samar M. Mahgoub ,&nbsp;Mahmoud A. Mohamed ,&nbsp;Zienab E. Eldin ,&nbsp;Haifa E. Alfassam ,&nbsp;Hassan A. Rudayni ,&nbsp;Abdullah S. Alawam ,&nbsp;Fahd A. Nasr ,&nbsp;Rehab Mahmoud","doi":"10.1016/j.jconhyd.2024.104364","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104364","url":null,"abstract":"<div><p>The increase in antibiotic residues poses a serious threat to ecological and aquatic environments, necessitating the development of cost-effective, convenient, and recyclable adsorbents. In our study, we used cellulose-based layered double hydroxide (LDH) as an efficient adsorbent and nanocarrier for both sulfamethoxazole (SMX) and cefixime (CFX) residues due to their biodegradability and biocompatibility. Chemical processes are measured according to green chemistry metrics to identify which features adhere to the principles. A GREEnness Assessment (ESA), Analytical GREEnness Preparation (AGREEprep), and Analytical Eco-Scale Assessments (ESA) were used to assess the suitability of the proposed analytical method. We extensively analyzed the synthesized Co<img>Fe LDH/cellulose before and after the adsorption processes using XRD, FTIR, and SEM. We investigated the factors affecting the adsorption process, such as pH, adsorbent dose, concentrations of SMX and CFX and time. We studied six nonlinear adsorption isotherm models at pH 5 using Co<img>Fe LDH, which showed maximum adsorption capacities (qmax) of 272.13 mg/g for SMX and 208.00 mg/g for CFX. Kinetic studies were also conducted. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay was performed on Vero cells in direct contact with LDH nanocomposites to evaluate the cytotoxicity and side effects of cellulose-based Co<img>Fe LDH. The cellulose-based Co<img>Fe LDH nanocomposite demonstrated excellent cytocompatibility and less cytotoxic effects on the tested cell line. These results validate the potential use of these unique LDH-based cellulose cytocompatible biomaterials for water treatment applications. The cost of the prepared adsorbents was investigated.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104364"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140918543","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":"Influence of clay minerals on pH and major cation concentrations in acid-leached sands: Column experiments and reactive-transport modeling","authors":"Marine Bonnet ,&nbsp;Valentin Robin ,&nbsp;Flora Parrotin ,&nbsp;Niya Grozeva ,&nbsp;Nicolas Seigneur ,&nbsp;Munkh-Erdene Batbaatar ,&nbsp;Michael Descostes","doi":"10.1016/j.jconhyd.2024.104363","DOIUrl":"10.1016/j.jconhyd.2024.104363","url":null,"abstract":"<div><p>A series of laboratory experiments are conducted to simulate the acidification and subsequent recovery of a sand aquifer exploited by <em>in situ</em> recovery (ISR) mining. A sulfuric acid solution (pH 2) is first injected into a column packed with sand from the Zoovch Ovoo uranium roll front deposit (Mongolia). Solutions representative of local groundwater or enriched in cations (Na⁺, Mg²⁺) are then circulated through the column to simulate the inflow of aquifer water. pH and major ion concentrations (Na⁺, Cl⁻, <span><math><msubsup><mi>SO</mi><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></math></span>, Ca²⁺, Mg²⁺, K⁺) measured at the column outlet reproduce the overall evolution of porewater chemistry observed in the field. The presence of minor quantities of swelling clay minerals (≈6 wt% smectite) is shown to exert an important influence on the behavior of inorganic cations, particularly H⁺, <em>via</em> ion-exchange reactions. Numerical models that consider ion-exchange on smectite as the sole solid-solution interaction are able to reproduce variations in pH and cation concentrations in the column experiments. This highlights the importance of clay minerals in controlling H⁺ mobility and demonstrates that sand from the studied aquifer can be described to a first order as an ion-exchanger. The present study confirms the key role of clay minerals in controlling water chemistry in acidic environments through ion-exchange processes. In a context of managing the long-term environmental footprint of industrial and mining activities (ISR, acid mine drainage…), this work will bring insights for modeling choices and identification of key parameters to help operators to define their production and/or remediation strategies.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104363"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0169772224000676/pdfft?md5=452f203a7314e216c59a3869cf708b95&pid=1-s2.0-S0169772224000676-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141031764","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}

{"title":"Adsorption and antibacterial studies of a novel hydrogel adsorbent based on ternary eco-polymers doped with sulfonated graphene oxide developed from upcycled plastic waste","authors":"Marwa H. Gouda ,&nbsp;M.M. Khowdiary ,&nbsp;Hind Alsnani ,&nbsp;N. Roushdy ,&nbsp;M. Elsayed Youssef ,&nbsp;Mohamed Elnouby ,&nbsp;Noha A. Elessawy","doi":"10.1016/j.jconhyd.2024.104362","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104362","url":null,"abstract":"<div><p>A novel ternary blended polymer composed of cost-effective and readily available polymers was synthesized using poly (vinyl alcohol) (PVA), iota carrageenan (IC), and poly (vinyl pyrrolidone) (PVP). Sulfonated graphene oxide (SGO), prepared from recycled drinking water bottles, was utilized as a doping agent. Varying amounts (1–3 wt%) were combined into the polymer matrix. The produced hydrogel film was examined as a potential adsorbent hydrogel film for the removal of methylene blue (MB) and Gentamicin sulfate (GMS) antibiotic from an aqueous solution. The experimental results demonstrate that the presence of SGO significantly increased the adsorption efficiency of PVA/IC/PVP hydrogel film. The antimicrobial tests revealed that the PVA/IC/PVP-3% SGO hydrogel film exhibited the most potent activity against all the tested pathogenic bacteria. However, the adsorption results for MB and GMS showed that the addition of 3 wt% SGO resulted in a removal percentage that was a two fold increase in the removal percentage compared with the undoped PVA/IC/PVP hydrogel film. Furthermore, the response surface methodology (RSM) model was utilized to examine and optimize several operating parameters, including time, pH of the solution, and initial pollutant concentration. The adsorption kinetics were better characterized by the pseudo-second-order kinetics model. The composite film containing 3 wt% SGO had a maximum adsorption capacity of 606 mg g⁻¹ for MB and 654 mg g⁻¹ for GMS, respectively. The generated nanocomposite hydrogel film demonstrated promising potential for application in water purification systems.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104362"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140906466","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":"Influence of salinity gradients on the diffusion of water and ionic species in dual porosity clay samples","authors":"Emmanuel Tertre ,&nbsp;Thomas Dabat ,&nbsp;Jingyi Wang ,&nbsp;Sébastien Savoye ,&nbsp;Fabien Hubert ,&nbsp;Baptiste Dazas ,&nbsp;Christophe Tournassat ,&nbsp;Carl I. Steefel ,&nbsp;Eric Ferrage","doi":"10.1016/j.jconhyd.2024.104357","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104357","url":null,"abstract":"<div><p>Most of the available data on diffusion in natural clayey rocks consider tracer diffusion in the absence of a salinity gradient despite the fact that such gradients are frequently found in natural and engineered subsurface environments. To assess the role of such gradients on the diffusion properties of clayey materials, through-diffusion experiments were carried out in the presence and absence of a salinity gradient using salt-diffusion and radioisotope tracer techniques. The experiments were carried out with vermiculite samples that contained equal proportions of interparticle and interlayer porosities so as to assess also the role played by the two types of porosities on the diffusion of water and ions. Data were interpreted using both a classical Fickian diffusion model and with a reactive transport code, CrunchClay that can handle multi-porosity diffusion processes in the presence of charged surfaces. By combining experimental and simulated data, we demonstrated that (i) the flux of water diffusing through vermiculite interlayer porosity was minor compared to that diffusing through the interparticle porosity, and (ii) a model considering at least three types of porous volumes (interlayer, interparticle diffuse layer, and bulk interparticle) was necessary to reproduce consistently the variations of neutral and charged species diffusion as a function of salinity gradient conditions.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104357"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0169772224000615/pdfft?md5=4473e86c5498e0e5d0071b28d806bcc1&pid=1-s2.0-S0169772224000615-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140901486","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}

{"title":"Alps at risk: High-mountain lakes as reservoirs of persistent and emerging contaminants","authors":"Paolo Pastorino ,&nbsp;Damià Barceló ,&nbsp;Marino Prearo","doi":"10.1016/j.jconhyd.2024.104361","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104361","url":null,"abstract":"<div><p>Despite their remote locations, high-mountain lakes located in the Alps are vulnerable to chemical pollution. This discussion explores the important aspects of these lakes as repositories of Persistent Organic Pollutants (POPs) and Contaminants of Emerging Concern (CECs), elucidating their sources and implications for both the environment and human health. In terms of the presence of POPs in high-altitude lakes of the Alps, 14 studies have been identified examining the occurrence of polychlorinated biphenyls, dichlorodiphenyltrichloroethane an its metabolites, polybrominated diphenyl ethers, and polycyclic aromatic hydrocarbons. The bulk of research on POPs in high-mountain lakes is concentrated in the Italian Alps (63%), followed by Switzerland (22%), Austria (12%), and France (3%), respectively. Sediment is predominantly investigated (65%), followed by fish (33%) and water (2%). Similarly, in relation to the presence of CECs in high-mountain lakes of the Alps, six studies have been identified investigating the occurrence of musks, perfluorinated compounds, and microplastics. Investigations into CECs predominantly occur in Switzerland (42%), France (33%), and Italy (25%), with fish samples (muscle and liver) being the primary focus (46%), followed by sediment (17%) and water (17%). Other compartments like zooplankton, frog/tadpoles, and snow remain less explored. The discussion also shed light on various pathways through which pollutants reach these remote landscapes, including atmospheric transport, glacial meltwater, and human activities. Protecting these pristine peaks demands concerted efforts encompassing ongoing research, vigilant monitoring, and dedicated conservation initiatives.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104361"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140910170","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 AI (artificial intelligence) detection furnish economic pathways for microplastics","authors":"Mamta Latwal,&nbsp;Shefali Arora,&nbsp;K.S.R. Murthy","doi":"10.1016/j.jconhyd.2024.104365","DOIUrl":"10.1016/j.jconhyd.2024.104365","url":null,"abstract":"<div><p>Microplastics pollution is killing human life, contaminating our oceans, and lasting for longer in the environment than it is used. Microplastics have contaminated the geochemistry and turned the water system into trash barrel. Its detection in water is easy in comparison to soil and air so the attention of researchers is focused on it for now. Being very small in size, microplastics can easily cross the water filtration system and end up in the ocean or lakes and become the prospective challenge to aquatic life. This review piece provides the hot research theme and current advances in the field of microplastics and their eradication through the virtual world of artificial intelligence (AI) <em>because Microplastics have confrontation with clean water tactics.</em></p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104365"},"PeriodicalIF":3.6,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141032468","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":"Microplastic prevalence and human exposure in the bottled drinking water in the west Godavari region of Andhra Pradesh, India","authors":"Vijaykumar Sekar ,&nbsp;Sheha Shaji ,&nbsp;Baranidharan Sundaram","doi":"10.1016/j.jconhyd.2024.104346","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104346","url":null,"abstract":"<div><p>Microplastics (MPs) are widespread, minute plastic particles present in various aquatic environments, raising concerns about their effect on human health and ecosystems. The detrimental effects of MPs on the environment, include the contamination of ecosystems, harm to aquatic life through ingestion, potential disruption of food chains, and long-term ecological consequences. Despite numerous studies confirming the MP's presence in aquatic environments, research specifically focused on MPs in bottled drinking water (BDW) is limited. Research on MPs in drinking water is vital to assess potential health risks and develop strategies for ensuring water safety and quality. This study fills a research gap by investigating microplastics (MPs) in nine brands of BDW in the West Godavari region of Andhra Pradesh, India. The average MP concentration in BDW was found to be 2.89 ± 0.48 items/L, with fibers being the predominant shape and sizes ranging from 500 to 1000 μm. Transparent and blue were the most common colors. From ATR-FTIR analysis, the dominant polymer found was polypropylene (PP) followed by polyethylene terephthalate (PET). The human risk assessment was also calculated using the formula of Estimated daily intake (EDI) and Lifetime intake (LTI). The calculation found that the EDI of MPs for children and adults ranged from 0.041 to 0.291 MPs per kilogram per day and 0.019 to 0.133 MPs per kilogram per day, respectively. The mean LTI of MP consumption of an individual, ranged from 17,958 to 2,54,861 MPs, considering an average age of 75 years. The current findings offer valuable information for ongoing evaluations of the potential human risks linked to MP exposure.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104346"},"PeriodicalIF":3.6,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140644529","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":"Efficient remediation of mercury-contaminated groundwater using MoS2 nanosheets in an in situ reactive zone","authors":"Mengxia Wang ,&nbsp;Qi Han ,&nbsp;Meng Zhang ,&nbsp;Xun Liu ,&nbsp;Bei Liu ,&nbsp;Zhongying Wang","doi":"10.1016/j.jconhyd.2024.104347","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104347","url":null,"abstract":"<div><p>Mercury contamination in groundwater is a serious global environmental issue that poses threats to human and environmental health. While MoS₂ nanosheets have been proven promising in removing Hg from groundwater, an effective tool for <em>in situ</em> groundwater remediation is still needed. In this study, we investigated the transport and retention behavior of MoS₂ nanosheets in sand column, and employed the formed MoS₂ <em>in situ</em> reactive zone (<em>IRZ</em>) for the remediation of Hg-contaminated groundwater. Breakthrough test revealed that high flow velocity and MoS₂ initial concentration promoted the transport of MoS₂ in sand column, while the addition of Ca ions increased the retention of MoS₂. In Hg removal experiments, the groundwater flow velocity did not influence the Hg removal capacity due to the fast reaction rate between MoS₂ and Hg. With an optimized MoS₂ loading, MoS₂ <em>IRZ</em> effectively reduced the Hg effluent concentration down to &lt;1 μg/L without apparent Hg remobilization. Additionally, flake-like MoS₂ employed in this study showed much better Hg removal performance than flower-like and bulk MoS₂, as well as other reported materials, with the Hg removal capacity a few to tens of times higher than those materials. These results suggest that MoS₂ nanosheets have the potential to be an efficient <em>IRZ</em> reactive material for <em>in situ</em> remediation of Hg in contaminated groundwater.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104347"},"PeriodicalIF":3.6,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140633340","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":"Effects of tire wear particles on the water retention of soils with different textures in the full moisture range","authors":"Amir Verdi ,&nbsp;Mahyar Naseri","doi":"10.1016/j.jconhyd.2024.104345","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104345","url":null,"abstract":"<div><p>Tire wear particles (TWPs) are significant contributors to microplastic pollution in the environment, yet there is limited scientific information concerning their impact on soil hydraulic properties. This study aimed to investigate the impact of TWPs at different concentrations (1, 4, 8, and 16% of the air-dried mass of packed soil samples, w/w) on the water retention curves (WRC) of southern California soils with five different textures (clay, clay loam, silt loam, sandy loam, and loamy sand). The concentrations of 8% and 16% were selected to represent extreme pollution scenarios that might occur near highway corridors. High-resolution water retention data, spanning from saturation to oven dryness, were generated using HYPROP™ and WP4C dew point meter instruments. We also developed WRC scaling equations based on the quantity of TWPs. The bulk density of the samples decreased as the TWP concentration in soils increased. The inclusion of very high concentrations of TWPs (8% and 16% w/w) led to a significant reduction in soil moisture content in the intermediate and dry ranges across various soil textures. However, at the same moisture range, adding 1% TWPs had a minimal impact on soil moisture reduction, while the influence of the 4% TWPs concentration treatment was noticeable only in loamy sand and partially in clay loam soils. Additionally, the overall plant available water decreased with increasing TWP concentrations, except for the clay soil. The texture-specific scaling models exhibited promising performance, with RMSE values ranging from 0.0061 to 0.0120 cm³ cm⁻³. When bulk density was included as an additional input predictor to construct a single scaling model for all textures, the RMSE increased. Nevertheless, it still indicated a good fit ranging from 0.007 to 0.024 cm³ cm⁻³, highlighting the suitability of simple scaling for identifying WRC in TWPs-polluted soils, particularly for practical purposes. The findings of this study can contribute to a better understanding and quantification of the impact of TWPs on soil hydrology.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104345"},"PeriodicalIF":3.6,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0169772224000494/pdfft?md5=4a3b9d1541243a3cde86f77cdd32e482&pid=1-s2.0-S0169772224000494-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140633339","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}

{"title":"Evaluate the groundwater quality and human health risks for sustainable drinking and irrigation purposes in mountainous region of Chongqing, Southwest China","authors":"Rui Li ,&nbsp;Yuting Yan ,&nbsp;Jiaqian Xu ,&nbsp;Chang Yang ,&nbsp;Si Chen ,&nbsp;Yangshuang Wang ,&nbsp;Yunhui Zhang","doi":"10.1016/j.jconhyd.2024.104344","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104344","url":null,"abstract":"<div><p>Groundwater is crucial for agriculture and domestic consumption. This research investigated the hydrogeochemical properties and contaminant sources of groundwater within the mountainous terrain of northern Chongqing, with the objective of evaluating its appropriateness for irrigation and potable use. The hydrochemical type of the groundwater was HCO₃ − Ca, dominated by silicate and calcite dissolutions. High NO₃⁻ (29.03% exceeds 10 mg/L) were attributed to the overuse of agricultural fertilizers. A comprehensive evaluation was conducted to determine the groundwater suitability for agricultural and potable uses. The results showed that groundwater in the southwestern region, particularly within the Yangtze River mainstem watershed, exhibited less suitability for irrigation owing to its lower mineralization, in contrast to the northeastern region near the Daning River watershed. But this trend is reversed for drinking purposes. Overall, the groundwater was appropriate for both drinking (93.55% were classified as excellent) and irrigation (70.98% were classified as low restriction) purposes in the study area. Deterministic and probabilistic noncarcinogenic health risk analyses centered on nitrate exposure revealed that infants (with 13.79% of samples &gt;1) were at greater risk than children (8.58%), adult males (6.98%), and adult females (5.24%). This underscores the urgency to reduce nitrogen fertilizer usage and improve water management in the region. This research will provide guidance for the sustainable groundwater management in mountainous regions.</p></div>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"264 ","pages":"Article 104344"},"PeriodicalIF":3.6,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140622101","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}