Journal of contaminant hydrology最新文献

{"title":"Influence of wettability on water retention curves in unconsolidated porous media.","authors":"Gerhard Schäfer, Kevin Hernandez Perez, Panav Hulsurkar, Magda Ibrahim Youssif, François Lehmann, Mohammad Piri","doi":"10.1016/j.jconhyd.2025.104502","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104502","url":null,"abstract":"<p><p>Controlled laboratory experiments were carried out using the hanging column method. Prior to the experiments, three uniform silica sands, which were originally water-wet, were aged in contact with crude oil until they were moderately oil-wet. Five fractionally wet sands were obtained by mixing the water-wet sands with oil-wet sands containing 25, 50 and 75 vol% oil-wet sands. A total of 11 tests formed the basis for the present study. The measured water retention curves showed that the capillary pressure heads were greatly reduced in sands that were oil-wet or fractionally wet. Changes in the wettability of the sands also affected their irreducible water saturation: The higher the proportion of oil-wet sand in the sand mixtures, the lower the irreducible water saturation. To quantify the characteristics of the measured water retention curves, the Van Genuchten model was used. The two optimized parameters seem to indicate a general trend: The higher the volume fraction of oil-wet sand, the higher is α and the lower is n. For the three unaged sands and the aged medium-sized sand, it was found that each of the two branches of the measured retention curves can be suitably scaled to a unique curve if, in addition to the petrophysical parameters (intrinsic permeability, porosity, surface tension, gas-water contact angle), the irreducible residual water saturation and the residual air saturation are taken into account. To quantify the observed deviations of the other two aged sands from the unified Leverett J-function, a theoretical fit function was used to match the experimental data of the three unaged sands. The experimental data sets for P2040ag and P100ag were found to be overestimated overall by the fit function. However, when the petrophysical parameters of the unaged sands were used instead of the actual measured parameters, the individual experimental Leverett J-functions came closer to the uniform J-curve. Based on this, it could be concluded that the apparent differences in pore structure between aged and unaged sands in addition to wettability, expressed by the cosine of the contact angle, may have contributed to a further reduction in the capillary pressure plateaus of the aged sands, which was particularly visible and significant in the P2040 and P100 sand. Using the measured static contact angles for two-phase gas-oil and oil-water systems and the measured interfacial tensions when the porous medium is either water-wet or moderately oil-wet, it was shown that the Bartell-Osterhof equation overestimates the measured gas-water contact angles. Reasonable agreement was achieved when a calibrated roughness factor of the solid surface was considered in the Young's contact angle.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104502"},"PeriodicalIF":3.5,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006379","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":"Identifying dissolved reactive phosphorus sources in agricultural runoff and leachate using phosphate oxygen isotopes.","authors":"Rose C K Mumbi, Mark R Williams, William I Ford, James J Camberato, Chad J Penn","doi":"10.1016/j.jconhyd.2025.104501","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104501","url":null,"abstract":"<p><p>Agricultural phosphorus (P) losses may result from either recently applied fertilizers or from P accumulated in soil and sediment. While both P sources pose an environmental risk to freshwater systems, differentiating between sources is crucial for identifying and implementing management practices to decrease loss. In this study, laboratory rainfall simulations were completed on runoff boxes and undisturbed soil columns before and after fertilizer application. The oxygen-18 signature of phosphate (δ¹⁸O_PO4) in fertilizer, surface runoff, subsurface leachate, and soil were analyzed (n = 107 samples) to quantify new (recently applied) and old (soil) P losses in runoff and leachate. Results showed that dissolved reactive P (DRP) concentration in runoff and leachate substantially increased during the rainfall simulation immediately after fertilizer application, with runoff and leachate δ¹⁸O_PO4 similar to fertilizer δ¹⁸O_PO4 signatures. Greater than 90 % of the DRP load during this event could be attributed to direct loss of P from fertilizer using δ¹⁸O_PO4. Beyond the first rainfall event after fertilizer application, DRP concentration decreased and leachate δ¹⁸O_PO4 values differed from the fertilizer values. Interpretation of isotope results was challenging because both abiotic (isotope fractionation during transport) and biotic (P cycling) processes may have influenced δ¹⁸O_PO4 signatures during these subsequent events. While abiotic effects on δ¹⁸O_PO4 appear more probable given the experimental conditions in the current study (high soil test P concentration, short duration between rainfall simulations, and strong relationship between event water and δ¹⁸O_PO4 signature), tracing or separating P sources remains highly uncertain during these events post-fertilizer application. Findings highlight both potential opportunities and challenges of using δ¹⁸O_PO4 to trace sources of P through the landscape.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104501"},"PeriodicalIF":3.5,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143006330","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":"Recent progresses and perspectives of polyethylene biodegradation by bacteria and fungi: A review.","authors":"Yun Kong, Renjuan Wang, Qingyun Zhou, Jiamiao Li, Yimeng Fan, Qi Chen","doi":"10.1016/j.jconhyd.2025.104499","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104499","url":null,"abstract":"<p><p>Plastics pollution has become a serious threat to the people and environment due to the mass production, unreasonable disposal and continuous pollution. Polyethylene (PE), one of the most utilized plastics all over the world, is considered as a highly recalcitrant environmental destruction problem on account of strong hydrophobicity and high molecular weight. Therefore, it is urgently necessary to seek economical and efficient treatment and disposal methods for PE. Considering microorganisms can use various carbon sources for anabolism, they are recognized to have great potential in the biodegradation of microplastics including PE. From this point of view, the present review concentrates on providing information regarding the current status of PE biodegradation microorganisms (bacteria and fungi), and the influencing factors such as PE characteristics, cellular surface hydrophobicity, physical treatments, chemicals addition, as well as environmental conditions for biodegradation are thoroughly discussed. Furthermore, the possible biodegradation mechanisms for PE involve the biofilm formation, biodeterioration, fragmentation, assimilation, and mineralization are elucidated in detail. Finally, the future research directions and application prospects of microbial degradation are prospected in this review. It is expected to provide reference and guidance for PE biodegradation and their potential applications in real contaminated sites.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104499"},"PeriodicalIF":3.5,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142949806","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 pollution in the marine environment: Distribution factors and mitigation strategies in different oceans.","authors":"Shahabaldin Rezania, Saba Miri, Jinwoo Cho, Jin Hur, Hesam Kamyab, Negisa Darajeh, Ali Akbar Mohammadi, Farzad Molani, Mohsen Taghavijeloudar","doi":"10.1016/j.jconhyd.2025.104496","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104496","url":null,"abstract":"<p><p>As the COVID-19 pandemic began in 2020, plastic usage spiked, and microplastic (MP) generation has increased dramatically. It is documented that MP can transfer from the source to the ocean environment where they accumulate as the destination. Therefore, it is essential to understand their transferring pathways and effective environmental factors to determine the distribution of MPs in the marine environment. This article reviews the environmental factors that affect MP distribution in the oceans including abiotic such as ocean currents and wind direction, physical/chemical and biological reactions of MPs, natural sinking, particle size and settling velocity, and biotic including biofouling, and incorporation in fecal material. It was found that velocity and physical shearing are the most important parameters for MP accumulation in the deep ocean. Besides, this review proposes different research-based, national-level, and global-level strategies for the mitigation of MPs after the pandemic. Based on the findings, the level of MP pollution in the oceans is directly correlated to coastal areas with high populations, particularly in African and Asian countries. Future studies should focus on establishing predictive models based on the movement and distribution of MPs to mitigate the levels of pollution.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104496"},"PeriodicalIF":3.5,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965171","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":"AQuA-P: A machine learning-based tool for water quality assessment.","authors":"L Díaz-González, R A Aguilar-Rodríguez, J C Pérez-Sansalvador, N Lakouari","doi":"10.1016/j.jconhyd.2025.104498","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104498","url":null,"abstract":"<p><p>This study addresses the critical challenge of assessing the quality of groundwater and surface water, which are essential resources for various societal needs. The main contribution of this study is the application of machine learning models for evaluating water quality, using a national database from Mexico that includes groundwater, lotic (flowing), lentic (stagnant), and coastal water quality parameters. Notably, no comparable water quality classification system currently exists. Five advanced machine learning techniques were employed: extreme gradient boosting (XGB), support vector machines, K-nearest neighbors, decision trees, and multinomial logistic regression. The performance of the models was evaluated using the accuracy, precision, and F1 score metrics. The decision tree models emerged as the most effective across all water body types, closely followed by XGB. Therefore, the decision tree models were integrated into the AQuA-P software, which is currently the only software of its kind. It is recommended that these innovative water classification models be used through the AQuA-P software to facilitate informed decision-making in water quality management. This software provides a probability-based classification system that contributes to a deeper understanding of water quality dynamics. Lastly, an open-access repository containing all the datasets and Python notebooks used in our analysis is provided, allowing for easy adaptation and implementation of our methodology for other datasets worldwide.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104498"},"PeriodicalIF":3.5,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142949804","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":"From brushite to hydroxylapatite: A study on phosphate mineral transformation and the fate of oxytetracycline.","authors":"Jianan Guo, Lina Chen, Xinying Zhang, Changmin Jin, Yue Cui","doi":"10.1016/j.jconhyd.2025.104497","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2025.104497","url":null,"abstract":"<p><p>Livestock manure, a common fertilizer in Chinese agriculture, can lead to environmental contamination and potential health risks due to elevated antibiotic and phosphorus levels. Importantly, the high phosphorus levels initiates transformations of phosphate minerals in soils, especially calcareous soils. These variations in phosphate mineralogy can significantly impact the migration and fate of antibiotics within the soil. However, the impact of the transformation process, particularly involving the metastable phase brushite (DCPD), on the fate of antibiotics remains unclear. In this study, we synthesized DCPD and hydroxylapatite (HAP) and examined their transformation process to assess their removal capacity and investigate the migration and fate of oxytetracycline (OTC). The findings reveal that HAP exhibits a maximum immobilization capacity for OTC of 20.10 mg/g, surpassing that of DCPD by 2.56 times (7.86 mg/g). This disparity in immobilization capacity between DCPD and HAP leads to a redistribution of OTC between the solid and liquid phases during the transformation process. Notably, the introduction of OTC also inhibits the transformation process, potentially impacting the fate of other potentially harmful elements. The study highlights that the transformation process of calcium phosphorus minerals has a significant impact on the mobility and fate of antibiotics in soil, which aids in better management and mitigation of the environmental risks associated with fertilizer application.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104497"},"PeriodicalIF":3.5,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142983791","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":"Escherichia coli transport in two acidic soils: Effect of microbially induced calcite precipitation technology.","authors":"Zahra Ramezani, Mohammad Bagher Farhangi, Nasrin Ghorbanzadeh, Mahmoud Shabanpour","doi":"10.1016/j.jconhyd.2024.104493","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104493","url":null,"abstract":"<p><p>Microbially induced calcite precipitation (MICP) while neutralizing soil pH, can lead to pore clogging which in turn may reduce bacteria transport. This study aimed to evaluate the effectiveness of the MICP process for E. coli filtration in two acidic soils. Two soil samples from Amlash (Am) and Lahijan (La) areas with pH values of 5.88 and 3.93, repectively, were collected and poured into plastic columns (14.92 × 2.4 cm). For the MICP reaction, the soil columns were saturated with a solidification solution (1:1 urea: CaCl₂, 1.5 M) and Sporosarcina pasteurii (∼10⁸ cell mL^-1), and incubated at 30 °C for 72 h. Leaching experiments were conducted on both MICP-treated and control soil columns at steady-state, saturated flow condition. A pulse of influent (0.1 PV) containing Escherichia coli (ciprofloxacin-resistant) (∼10⁸ cell mL^-1) and bromide tracer (1000 mg L^-1 KBr) was added at the top of the soil columns, followed by sterile water to collect the effluent. Recovered E. coli, and Br^-, HCO₃^-, NH₄⁺, Ca²⁺ ions were measured in the leachate. The profile of residual E. coli count, urease activity, and bioprecipitated CaCO₃ content were also assessed in the soil. Correlated with bioprecipitated CaCO₃, the hydraulic conductivity coefficients (K_s) was reduced by 4.4 and 5.8 times after MICP treatment in Am and La soils, respectively, thus bacteria leaching was significantly reduced. A higher filtration coefficient (λ_f) and recovery rate of E. coli were calculated in the La soil column, likely due to the lower pH and higher anion exchange capacity, which induced greater bacterial mortality and electrostatic attraction, respectively. MICP treatment reduced the average and cumulative count of E. coli by ∼3.4 times compared to the control column. In conclusion, the application of MICP in acidic soil increased soil pH and reduced the risk of E. coli transport to deeper layers by reducing soil hydraulic conductivity.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104493"},"PeriodicalIF":3.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142927310","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":"Dynamic transformation and leaching processes of nitrogen in a karst agricultural soil under simulated rainfall conditions.","authors":"Ping Zhang, Fu-Jun Yue, Xiao-Dan Wang, Sai-Nan Chen","doi":"10.1016/j.jconhyd.2024.104494","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104494","url":null,"abstract":"<p><p>Frequent exchange of surface water and groundwater in karst agricultural areas results in soil nutrient loss during rainfall and consequent deterioration of the aquatic environment. To understand nitrogen (N) transformation and leaching processes from karst soil during rainfall events, two typical N fertilizers were added to karst soil and consequently investigated the nitrogenous species using soil column experiments system. The contents of various N forms in the soil and leachate were analyzed, and the net nitrification and the N leaching rates were calculated. The results revealed that NH₄⁺ and NO₂^- accumulation and variation occurred primarily in shallow soils, indicating that shallow soils were the primary sites for ammonification and nitrification processes. The net nitrification rate in the soil was higher with application of urea (12.5 mg N kg^-1d^-1) than with manure (2.4 mg N kg^-1d^-1). Peak N content indicated that it took only 7 days for N to migrate from the topsoil to 90 cm depth of soil after applying urea during successive intense rainfall events. NO₃^- leaching was predominantly composed of N, followed by DON, with leaching ratios of 31.1 % for the urea column and only 1.7 % for the manure column. These results highlight that the rapid nitrification of urea application coupled with intensive rainfall accelerated nitrate leaching into subterraneous streams in karst hydrological system, supporting a significant contribution from agricultural fertilizer loss during rainfall in karst area.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104494"},"PeriodicalIF":3.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142927309","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":"Unravelling land-based discharge of microplastics in River Basantar of Jammu & Kashmir, India: Understanding sinking behaviors and risk assessments.","authors":"Shaveta Padha, Rakesh Kumar, Yogesh Sharma, Anjali Dhar","doi":"10.1016/j.jconhyd.2024.104490","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104490","url":null,"abstract":"<p><p>Microplastics (MPs) are ubiquitous and are increasing globally, but there is limited information available on their presence in freshwater ecosystems. This research work aims to investigate the abundance, sinking behavior, and risk assessment of MPs in the freshwater River Basantar, Jammu & Kashmir, India. Microplastic abundance in sediments was recorded in the range of 1-6 items g^-1, with a mean abundance of 3 ± 1.594 item g^-1, whereas MPs in surface water ranged from 200 to 850 items L^-1 with a mean abundance of 530 ± 218.4 items L^-1 among 12 sites for sediments and 10 sites for surface water. Besides, the sinking behavior of MPs was analyzed through portioning coefficients (K_d) at sediments-surface water interface, which ranges from 0.71 to 2.50 L Kg^-1 for River Basantar. The most common shapes identified were fragments, fibres, and films, followed by pellets, foams, and lines. ATR-FTIR polymeric characterization reported polyethylene, polypropylene, polystyrene, polyethylene terephthalate, and polyvinyl chloride, and thus, polymeric risk assessment analysis was also evaluated and normally distributed in the River Basantar. Polymer Hazard Index was calculated across all the sites which observed to be polluted under risk categories \"III\" and \"IV\" for both the sediments and surface water samples. Pollution Load Index (PLI) calculated across all the sites was >1 depicting all the sites for both sediments and surface water sampling to be polluted. Pollution Risk Index was assessed and majority of surface water and sediment samples were observed to be under \"Very high\" risk category. The study, using principal component analysis and heatmap analysis, found that MPs are primarily a result of urbanization and anthropogenic actions, like industrial discharges, household wastes, and agricultural runoffs. This study highlights the significance of more investigation and coordinated efforts to solve the worldwide problem of plastic pollution in freshwater environments. Results data provide insight into the current state of MP contamination and will help government authorities implement strict rules and perform management interventions to reduce and monitor pollution levels in River Basantar. Future studies on the partitioning of MPs in sediments and surface water must be focused on aggregation, biofouling, plastic density & size, salinity, and flow behaviors to understand transport and deposition in rivers.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104490"},"PeriodicalIF":3.5,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142894875","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 as adsorbent for Pb²⁺ and Cd²⁺: A comparative study of polypropylene, polyvinyl chloride, high-density polyethylene, and low-density polyethylene.","authors":"Tae-Jung Ha, Woo-Ri Lim, Junyong Heo, Minhee Lee, Minjune Yang","doi":"10.1016/j.jconhyd.2024.104491","DOIUrl":"https://doi.org/10.1016/j.jconhyd.2024.104491","url":null,"abstract":"<p><p>Microplastics (MPs) in aquatic environments adsorb heavy metals, thereby posing potential environmental risks. However, further research is needed to elucidate the adsorption behavior of different types of MPs for various heavy metals. The aim of this study was to characterize four types of MPs: polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE), and low-density polyethylene (LDPE). Moreover, their Pb²⁺ and Cd²⁺ adsorption properties were determined to investigate the differences in their capacity to function as heavy metal adsorbents. MPs were characterized via scanning electron microscopy (SEM) using energy dispersive X-ray spectrometer (EDS), Brunauer-Emmett-Teller (BET) analysis, and Fourier transform infrared spectroscopy (FTIR). Adsorption experiment data were analyzed using the Langmuir and Freundlich isotherm models to evaluate the adsorption capacity of the MPs. Based on the results of the adsorption isotherm models and 2D-COS FTIR, the presence of oxygen-containing functional groups, including hydroxyl, carbonyl, and carboxyl groups influences the adsorption process of Pb²⁺ and Cd²⁺ onto PP and PVC, with the maximum adsorption capacities (Q_m) being 0.759 mg/g and 0.495 mg/g, respectively. Combination of the adsorption isotherm data and characteristics of MPs revealed that the following order of adsorption efficiencies of MPs for each heavy metal: PP > LDPE > PVC > HDPE for Pb²⁺ and PP > PVC > LDPE > HDPE for Cd²⁺. The results of this study suggest that MPs, particularly PP and PVC, may serve as vectors for heavy metal transport in aquatic environments, highlighting the need for further research to assess their environmental impact.</p>","PeriodicalId":15530,"journal":{"name":"Journal of contaminant hydrology","volume":"269 ","pages":"104491"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142909637","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}