Environmental Pollution最新文献

{"title":"Simultaneous removal of Microcystis aeruginosa and microplastics by oxidation enhanced coagulation","authors":"Wenjun Du, Xin Xu, Lili An, Feng Yan, J Paul Chen, Ruihua Dai","doi":"10.1016/j.envpol.2024.125555","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125555","url":null,"abstract":"The composite pollution is an increasingly severe challenge in the field of water treatment. Especially, microplastics (MPs) contamination and <em>Microcystis aeruginosa</em> (<em>M. aeruginosa</em>) were verified that they could synergistically pose a serious threat to safety of drinking water. Therefore, developing effective removal technology is an urgent task. In this study, the simultaneous removal of <em>M. aeruginosa</em> and polystyrene (PS, a typical plastic matter) was investigated by H₂O₂ enhanced Fe(II) coagulation. The results demonstrated that the removal rate of both algae and PS can reach over 90%. It was also demonstrated that the PS removal efficiency increased from 23.3% to 97.3% with the increase of <em>M. aeruginosa</em> biomass from 0 cells/mL to 0.5×10⁶ cells/mL. The possible reason might be that the addition of algal cells raises the number of contaminant particles, which greatly increases the floc size during the coagulation process. It makes MPs easier to be trapped by sweep flocculation in this process. Additionally, naturally weathered polystyrene (NWPS) exhibited higher removal rate than virgin PS, due to more original functional groups, larger particle size (d₅₀ 9.75 μm to 11.25 μm), and a lower absolute zeta potential (-34.15 mV to -30.1 mV). Furthermore, low Fe residue level and AOM (algal organic matter) control was simultaneously achieved in this process (TOC &lt; 1 mg/L, MCs &lt; 1 μg/L). Therefore, this study suggests that the H₂O₂-Fe(II) process is an efficient and green technology for the removal of <em>M. aeruginosa</em> and PS composite pollutants without secondary pollution, which is promising technology in drinking water treatment plant.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"25 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Fate of Polycyclic Aromatic Hydrocarbon (PAHs) in Urban Lakes under Hydrological Connectivity: A Multi-Media Mass Balance Approach","authors":"Shizhao Zhang, Xinli Xing, Haikuo Yu, Minkai Du, Yuan Zhang, Peng Li, Xin Li, Yanmin Zou, Mingming Shi, Weijie Liu, Shihua Qi","doi":"10.1016/j.envpol.2024.125556","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125556","url":null,"abstract":"Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants widely present in various environmental media. Some PAHs have carcinogenic, teratogenic, and mutagenic effects. Urban lakes are severely polluted by PAHs due to human activities. Longyang Lake (LL) and Moshui Lake (ML), which serve as entry lakes for Wuhan's “Six Lakes Connectivity” project, were chosen as the study areas to learn about the migration of PAHs. Water flows from LL to ML through the Mingzhu River. Multi-Media Mass Balance Model (MMBM) and fugacity fractions (<em>ff</em>) were used to characterize the migration of PAHs under the hydrological connectivity project. Compared to <span><math></math></span>, the MMBM can describe the migration of PAHs in a more detailed and quantitative way. The concentration of PAHs in water of LL decreased from 36.5 ng·L^-1 to 26.59 ng·L^-1 over 43 days, while those in ML increased from 46.8 ng·L^-1 to 198.25 ng·L^-1 over 141 days. Sediment takes a longer time to decrease to stabilization. The concentration of PAHs in the sediment of LL decreased from 932 ng·g^-1 to 0.95 ng·g^-1 over 13.33 years, while those in ML decreased from 4812 ng·g^-1 to 1.04 ng·g^-1 over 16.96 years. The stabilized concentrations were consistently lower than the observed concentrations and fell below the modeled stabilized concentrations obtained in the unconnected case (2170 ng·L^-1 in water and 40.81 ng·g^-1 in sediment). The MMBM showed that PAHs in the lake are mainly exported through runoff. However, modeling results indicated that upstream LL did not increase total PAHs concentrations in the ML because the output from ML was significantly higher. Sediment parameters sensitively influenced the results of the model. Although the simulation results showed reductions of PAHs pollution in two lakes under the hydrological connectivity project, long-term monitoring results are needed to optimize the model.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"87 3 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Screening for Microplastics in Agricultural Soils: Applying Green Chemistry Principles in Extraction and Analysis","authors":"Diana Rede, Rui Vilarinho, Joaquim Agostinho Moreira, Luca Nizzetto, Cristina Delerue-Matos, Virgínia Cruz Fernandes","doi":"10.1016/j.envpol.2024.125550","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125550","url":null,"abstract":"In recent years, microplastic (MP) pollution has garnered significant attention owing to its ability to permeate various ecosystems, including soil. These particles can infiltrate the environment, either directly or through the degradation of larger plastic items. Despite growing concerns, standardized methods for quantification are still lacking. This study aimed to screen for the presence of MPs in agricultural soils while incorporating green analytical principles in the methodology. A density separation followed by centrifugation was employed, based on the principles of the QuEChERS extraction method. This approach minimized sample quantities, reagent consumption, and waste production, ensuring efficient extraction and analysis. Recovery tests using certified soils spiked with pristine MPs, specifically polystyrene, polypropylene (PP), and ethylene-vinyl acetate for larger MPs (3-5 mm), and low-density polyethylene, polyamide 6, and tire wear particles for smaller MPs (15-300 μm),achieved recovery levels exceeding 69% for smaller MPs and over 91% for larger particles. Spectroscopic analysis revealed slight alterations in the Raman spectra of MPs after extraction. Transitioning to agricultural soil analysis has revealed challenges, including spectral interferences. Nine mesoplastics (plastic items 5-20 mm) were detected, predominantly consisting of PP and PE, along with seven MPs, three of which were individually identified as PE-based, while the remainder were inconclusive, including one fiber. The evaluation of the method's sustainability using the Analytical Eco-Scale and Analytical Greenness Calculator Metric (AGREE), with scores of 82 out of 100 and 0.66 out of 1, demonstrated its potential as a liable approach to MP analysis in soils. This study highlights the potential of integrating green analytical chemistry principles into MP extraction methodologies and emphasizes the value of the proposed QuEChERs-based approach for improving the sustainability and efficiency of MP monitoring in agricultural soils.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"90 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"miR-629-3p inhibits fine particulate matter exposure-induced lung function decline: results from the two-stage population study and in vitro study","authors":"Min Zhou, Xiaojie You, Jiake Zhang, Zi Ye, Jiahao Song, Bingdong Chen, Lieyang Fan, Jixuan Ma, Shijie Yang, Man Cheng, Weihong Chen","doi":"10.1016/j.envpol.2024.125535","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125535","url":null,"abstract":"MiRNAs were reported to play crucial roles in the pathogenesis of health damage caused by environmental pollutants. However, its potential role in fine particulate matter (PM_2.5) exposure-induced lung function decline has rarely been elucidated. The present study was developed to profile specific miRNAs that were related to both PM_2.5 exposure and lung function decline, and to investigate the regulating role in PM_2.5 exposure-induced lung injury. Based on the Wuhan-Zhuhai cohort, in the discovery stage, plasma miRNA profiling for PM_2.5 exposure was conducted through next-generation sequencing among 60 participants with 120 observations in a repeated-measures design. Plasma miRNA profiling for lung function decline was conducted among 10 pairs of lung function decline incident cases and matched healthy controls. In the validating stage, miR-629-3p was selected from miRNAs that were related to both PM_2.5 exposure and lung function decline, and was measured by quantitative real-time PCR among 475 residents to validate its association with PM_2.5 exposure as well as lung function. <em>In vitro</em>, PM_2.5-treated A549 and BEAS-2B cell models and miR-629-3p mimic/inhibitor models were used to explore the role and underlying mechanism of miR-629-3p on epithelial-mesenchymal transition (EMT) induced by PM_2.5 exposure. The two-stage population study found a negative association between personal PM_2.5 exposure and plasma miR-629-3p, while a positive association between miR-629-3p and lung function. <em>In vitro</em>, PM_2.5 treatment stimulated the expressions of EMT-related factors, accompanied by the activation of TGF-β1/TGF-βR1 signal pathway. Overexpression of miR-629-3p could inhibit PM_2.5-induced TGF-βR1 expression and alleviate EMT process. And inhibition of miR-629-3p could promote TGF-βR1 expression and aggravate EMT process. In conclusion, miR-629-3p may alleviate the lung injury induced by PM_2.5 exposure through inhibiting TGF-β1/TGF-βR1 pathway.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"48 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Environmental release behavior, cell toxicity and intracellular distribution of novel biodegradable plastic materials","authors":"Liang Wen, Qian Hu, Yue Lv, Weitong Ding, Tian Yin, Hongjun Mao, Ting Wang","doi":"10.1016/j.envpol.2024.125554","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125554","url":null,"abstract":"In response to the increasingly severe issue of plastic waste, biodegradable plastics have garnered extensive attention as a potential alternative to traditional plastics. Among these materials, biodegradable plastics hold a dominant position. The objective of this study was to assess the environmental risks of five commercially available biodegradable plastics: polyglycolic acid (PGA), polylactic acid (PLA), poly(butylene succinate) (PBS), poly(butylene carbonate) (PBC), and poly(butylene adipate-co-terephthalate) (PBAT). The evaluation included their physical properties, microplastic release behavior, and cytotoxicity. In addition, the effect of age process on the environmental behavior of biodegradable plastic materials was further investigated. The results revealed that PGA and PBS exhibited lower risks in terms of microplastic release, whereas PLA demonstrated higher environmental mobility. Further cytotoxicity experiments indicated that PLA and PBS exerted significant toxic effects on human cell lines, including human normal liver cells (LO2), human monocytic leukemia cells (THP-1), human umbilical vein endothelial cells (HUVECs), and human colon carcinoma cells (Caco-2). Additionally, this study utilized Nile Red labeling to observe the co-culture system of PGA with THP-1 cells, uncovering that THP-1 cells gradually engulfed and internalized PGA microplastics over time. This finding provides new insights into the potential mechanism by which microplastics promote cell proliferation. Moreover, we also found that the aging process partially reduced the cytotoxicity of PGA, but had little effect on environmental mobility. Considering the comprehensive research findings, PGA is considered an ideal material for large-scale applications due to its low cytotoxicity and environmental risks. In contrast, the environmental safety of other types of plastics requires more comprehensive risk assessment to determine their suitability. This study provides significant scientific evidence for the environmental impact assessment of biodegradable plastics and plays a crucial role in promoting the development of sustainable plastic alternatives.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"38 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Development of a comprehensive air risk index and its application to high spatial-temporal health risk assessment in a large industrial city","authors":"Sang-Jin Lee, In-Gyu Cho, Ho-Young Lee, Jeong-Tae Ju, Hye-Jung Shin, Sung-Deuk Choi","doi":"10.1016/j.envpol.2024.125545","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125545","url":null,"abstract":"Particulate matter (PM) contains various hazardous air pollutants (HAPs) that can adversely affect human health, highlighting the need for an integrated index to represent the associated health risks. In response, this study developed a novel index, the comprehensive air-risk index (CARI), for Ulsan, the largest industrial city in South Korea. This index integrates toxicity-weighted concentrations of polycyclic aromatic hydrocarbons (PAHs) and heavy metals using their inhalation unit risks. CARI was categorized into four risk levels based on probabilistic health risks. Over eight years (2013–2020) in Ulsan, the risk from PAH exposure showed a decreasing trend, whereas the risk from heavy metals remained stable, reflecting different emission patterns and major source types. PAHs and heavy metals contributed 38.1% and 61.9% to CARI, respectively, highlighting the greater impact of heavy metals on human health. Unlike the monthly variations in PM_2.5 concentrations, CARI values tended to increase in the summer and decrease in the spring and fall, indicating the impact of local emissions, particularly from petrochemical and non-ferrous industrial facilities. Moreover, a machine learning model enhanced the spatio-temporal resolution of CARI, showing that ‘unhealthy’ days were 2.4 times more frequent in industrial areas than in urban areas. In conclusion, CARI is a promising tool for assessing health risks in industrial cities and for developing risk-based management plans. Furthermore, we propose the development of a national-scale real-time CARI system by enhancing the spatio-temporal resolution of HAP data through the use of machine learning.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"30 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"The Influence of Road Vehicle Tyre Wear on Microplastics in a High-Traffic University for Sustainable Transportation","authors":"Hülya Aykaç Özen, Tuğba Mutuk","doi":"10.1016/j.envpol.2024.125536","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125536","url":null,"abstract":"Road-associated microplastics, originating from tire wear and fragmented litter, are significant contributors to microplastic pollution. This study examines the characteristics of these particles within a university, focusing on their size, shape, color, and polymer composition. Suspended microplastics were collected using portable active samplers for PM₁₀ and results have shown that PM₁₀ concentrations peaked on Thursdays and declined, reaching their lowest levels on Sundays, with overall weekend measurements indicating reduced concentrations compared to weekdays. Importantly, the presence of microplastics correlated with increased PM10 levels. These findings highlighted a dominance of irregularly fragmented black microplastics, primarily composed of polyethylene, polypropylene, and polybutadiene, influenced mainly by vehicular movement. Additionally, metal contaminants such as aluminum, iron, and zinc were identified through SEM-EDX analysis of selected microplastics, particularly concentrated at the university's main entrance, the area with the highest traffic. This research enhances understanding of atmospheric microplastic pollution in university environments with heavy vehicle traffic and supports efforts to promote sustainable transportation and climate-friendly initiatives.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"91 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Innovative Transgenic Zebrafish Biosensor for Heavy Metal Detection","authors":"H.M.L.P.B. Herath, Rohini M. de Silva, R.S. Dassanayake, Y.I.N.S. Gunawardene, J.R.P. Jayasingha, A. Schultz, C. Liongue, A.C. Ward, L.O.B. Afonso, K.M. Nalin de Silva","doi":"10.1016/j.envpol.2024.125547","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125547","url":null,"abstract":"Heavy metal contamination is an urgent environmental issue that poses a significant threat to human health and the ecosystem. To mitigate the adverse impacts of heavy metal pollution, the aim of this research was to develop genetically engineered zebrafish as biosensors, which offer a promising alternative for detecting heavy metal exposure, specifically Cd²⁺ and Zn²⁺. A novel heavy metal-sensitive gene construct metallothionine 2 promoter with DsRed reporter gene (<em>mt2</em>-<em>DsRed2</em>) was synthesized and integrated into zebrafish embryos using a Tol2 transposon transposase system with the transgenic zebrafish line subjected to biosensing applications for Cd²⁺ and Zn²⁺. The biosensor showed specific responses with linear correlation heavy metal concentration and DsRed fluorescence signal for Cd²⁺ and Zn²⁺ with (<em>p</em> &lt; 0.01) a minimum detection limit of 4 ppb for each metal ion but not for the non-specific metal ion Ni²⁺, which makes it suitable for laboratory-based heavy metal assessment assays in the low heavy metal concentration ranges of 0-10 ppb. Additionally, the study investigated the toxicity of heavy metals on zebrafish early developmental stages applying a modified version of the OECD Fish Embryo Toxicity (FET-236) test. Accordingly, Cd²⁺, Zn²⁺, and Ni²⁺ exhibited no significant toxicity effects on zebrafish embryos within the low dose range of 2-10 ppb confirming the biocompatibility of the transgenic zebrafish biosensor for heavy metal sensing applications. Thus, the developed transgenic zebrafish line can accurately sense heavy metals Cd²⁺ and Zn²⁺ within the low dose range, making it a promising alternative laboratory assay for environmental monitoring and risk assessment.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"30 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Assessing the impact of individual exposure to air pollution via biomarkers in sputum of children in Ho Chi Minh City, Vietnam","authors":"Linh Le Tran, An Le Pham, Minh Duc Do, Quynh Nhat Nguyen, Hieu K.T. Ngo, Hong H.T.C. Le, Vinh Nhu Nguyen, Dung Phung, Peter D. Sly, Phong K. Thai","doi":"10.1016/j.envpol.2024.125544","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125544","url":null,"abstract":"Understanding the impact of exposure to air pollution on children’s health is critical for developing effective child health protection policies. Alveolar macrophage black carbon (AMBC) provides an indicator of personal exposure to air pollution. Hence, we aimed to examine air pollution exposure and its effects on children by measuring AMBC area and inflammatory cytokines in sputum. Sputum induction was attempted in 120 children aged 13–14 years, but samples of sufficient volume and quality for analysis were only obtained from 47 (39.2%). Alveolar macrophages (AMs) were visualized, and black carbon (BC) area quantified by microscopy. Participants completed questionnaires, recording air pollution exposure and respiratory symptoms. Univariable associations between AMBC area and respiratory symptoms, exposure variables, cytokines, and pulmonary function were examined. Multivariable regression was conducted, adjusting for potential confounders. The median AMBC area was 0.23 μm² (range: 0.09 to 0.77 μm²). Most participants (87%) reported a history of respiratory symptoms. AMBC area was related to the distance from home to school, living on the main road, and the habit of opening windows for ventilation. No significant associations were seen between AMBC area and respiratory symptoms, lung function, or inflammatory markers (IL-8, TNF-α, IFN-α). Our findings support the use of AMBC area as a biomarker of individual air pollution exposure. The lack of associations between AMBC area and health outcomes is likely due to a lack of study power, indicating more extensive studies are required.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"254 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Two strains of cadmium (Cd)-resistant bacteria isolated from soils and their ability to promote oilseed rape (Brassica juncea L.) to grow and absorb Cd in soils","authors":"Fang Wang, Xia Jia, Yonghua Zhao, Xuelian Yang, Xiaojuan Feng","doi":"10.1016/j.envpol.2024.125549","DOIUrl":"https://doi.org/10.1016/j.envpol.2024.125549","url":null,"abstract":"As a highly toxic, mobile, and persistent heavy metal, cadmium (Cd) in soils is becoming a crucial environmental problem. Most of classical physical and chemical remediation measures for Cd-contaminated soils possibly cause some dangers to soil structure and characteristics and potential secondary pollution, however, Cd-resistant microbial which can sequestrate Cd by releasing extracellular polymeric substances (EPS) capable of ion exchange, coordination, and adsorption and improve plant growth should be favorable for remediation of Cd-contaminated soils due to being environmentally friendly and cost-effective. Therefore, the plant-microbe combination is becoming a priority option in the remediation of Cd-contaminated soils. Here, we isolated two strains of Cd-resistant bacteria from soils and investigated the ability of the two strains to promote growth of oilseed rape (<em>Brassica juncea</em> L.) and Cd uptake by the plants. <em>Citrobacter farmeri</em> and <em>Cupriavidus gilardii</em> were isolated from soils via culture media containing 30 and 50 mg /L Cd, respectively, which could release EPS including proteins, polysaccharide, and DNA. The EPS from <em>C. gilardii</em> was significantly higher than that from <em>C. farmeri</em>, and the proportion of protein in EPS was the highest for two strains. Additionally, two strains secreted indole-3-acetic acid (IAA) and could solubilize phosphorus, and the ability of <em>C. gilardii</em> to secret IAA was significantly higher than that of <em>C. farmeri</em>. The pot experiment indicated that <em>C. farmeri</em> and <em>C. gilardii</em> significantly enhanced oilseed rape biomass (by 81.99% and 76.57%, respectively), C and N contents, Cd accumulation in plants by 229.03% and 264.63%, respectively, and remediation efficiency at 40 days after emergence (flowering stage). However, the difference in promoting plant growth and Cd uptake and phytoremediation efficiency of Cd-contaminated soils between the two strains was not significant. Overall, <em>C. farmeri</em> and <em>C. gilardii</em> isolated from soils might be promising strains in enhancing phytoremediation of Cd-contaminated soils.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"39 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}