Environmental Research最新文献

{"title":"Effect of metal ions on moving bed biofilm reactor (MBBR) for nitrogen removal in wastewater: Performance characteristics, flocculation efficiency and bacterial community.","authors":"Mengcheng Sheng, Jiamin Liu, Yiyang Zhou, Sicheng Shao","doi":"10.1016/j.envres.2024.120655","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120655","url":null,"abstract":"<p><p>Advanced operational moving bed biofilm reactor (MBBR) has demonstrated to achieve simultaneous sludge yield minimization and pollutants removal. However, effect of different metal ions on MBBR performance for nutrients removal in wastewater under low carbon to nitrogen ratio is still unclear. Fate of NH₄⁺-N and NO₃^--N by MBBR were explored under the influence of Mn(II), Cu(II), and Fe(II) at carbon to nitrogen ratio of 5. The result showed that Mn(II) and Fe(II) significantly improved the NH₄⁺-N and TN removal with a removal ratio of 71.0% and 80.5%, and 77.8% and 87.5% compared to the absence of added metal ions, and Cu(II) reduced the nitrogen removal. Biofilm characteristics including extracellular polymeric substances (EPS), electron transport system activity, and reactive oxygen species were investigated. The result indicated that both Mn(II) and Fe(II) enhanced the extracellular polymeric substances activity, electron transfer, and flocculation efficiency and hydrophilicity of biofilm. Furthermore, nitrification and denitrification processes of MBBR were further evaluated by X-ray photoelectron spectroscopy, fourier transform infrared reflection, cyclic voltammetry, differential pulse voltammetry, and Tafel curves. The result revealed that the main functional groups (e.g., C=O, C-O, and O-C=O bonds), and manganese and iron cycling might be involved in the nitrogen and metal ions removal. Finally, microbial community and co-occurrence network of biofilm were studied, showing that Proteobacteria and Bacteroidetes were identified as the dominant phyla for nitrogen and metal ions removal. This study aimed to provide the technical support for the startup and engineering applications of MBBR in wastewater treatment.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120655"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862812","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":"Engineering of lattice defects in supported Cu-Mn-Ce composite oxide catalysts through ultra-low Pd doping and plasma treatment for catalytic oxidation of hexane.","authors":"Zihao Li, Zewen Chen, Chen Ye, Lixi Gong, Hui Wang, Jie Zhou","doi":"10.1016/j.envres.2024.120652","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120652","url":null,"abstract":"<p><p>Despite the low cost of supported non-precious metal catalysts, their catalytic activity is significantly lower than that of precious metal catalysts in the catalytic oxidation reaction of volatile organic compounds (VOCs). In order to enhance the catalytic activity of supported non-precious metal catalysts, we introduced an ultra-low loading of palladium into the existing catalytic system and employed a plasma preparation process instead of the conventional impregnation method. The approach significantly improves the catalytic activity of the active sites on the catalyst. The results indicate that, compared to the supported Pd and CuMnCeO_x catalysts prepared by conventional impregnation method, the Pd/CuMnCeO_x/SiO₂-P catalysts prepared via plasma exhibit a higher proportion of lattice defects (oxygen vacancies). Furthermore, the doping of the ultra-low Pd could facilitate the formation of additional lattice defects in the composite oxide. As a result, it can improve the content of surface active oxygen and enhance the adsorptive strength of hexane on the surface of the catalyst. The Pd/CuMnCeO_x/SiO₂-P catalysts exhibit high catalytic activity and stability in the catalytic oxidation of n-hexane. This work promotes the potential application in the preparation of catalyst with ultra-low precious metal loading.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120652"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862813","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":"Associations of gestational exposure to organophosphate esters with thyroid hormones in cord plasma and the safety threshold of exposure in pregnant women.","authors":"Hongchao Lian, Jiong Li, Maohua Miao, Yao Chen, Hong Liang, Jiaxian Chen, Min Luan, Wei Yuan, Yinan Liu, Ziliang Wang","doi":"10.1016/j.envres.2024.120639","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120639","url":null,"abstract":"<p><strong>Background: </strong>As a class of synthetic chemicals, organophosphate esters (OPEs) were shown to have thyroid hormones (THs) disrupting potentials in animal studies, while epidemiological evidence on gestational exposure to OPEs and thyroid disruption is limited. Besides, assessment on the safety threshold of OPEs exposure during gestation is especially scarce.</p><p><strong>Methods: </strong>Based on the Shanghai Minhang Birth Cohort Study, we measured maternal urine concentration of 8 OPE metabolites and THs levels in cord plasma and examined their associations using multiple linear regression and quantile g-computation (QGC) models. The benchmark dose (BMD) and its lower limit (BMDL) of urine OPE metabolites concentrations were further estimated via the Bayesian Benchmark Dose Analysis System (BBMD) to reflect the safety threshold of exposure in pregnant women. The corresponding daily intake (DI) of BMDL was then calculated and compared with the current oral reference dose (RfD).</p><p><strong>Results: </strong>A total of 309 mother-newborn pairs were included in this study. Gestational bis (2-butoxyethyl) phosphate (BBOEP) exposure was associated with higher total triiodothyronine (TT3), free triiodothyronine (FT3), total thyroxine (TT4), and free thyroxine (FT4) in cord plasma, while bis(1,3-dichloro-2-propyl) phosphate (BDCPP) was observed to be associated with lower TT3 and FT3/FT4 but higher thyroid stimulating hormone (TSH). In addition, sex-specific effects were observed for bis (2-chloroethyl) phosphate (BCEP), which was associated with lower TT3 in cord plasma of female newborns, and lower TT4 and FT4 in male newborns. Similar results were obtained through QGC model and BBOEP was identified as the main contributor to the higher levels of TT3 and FT3. With benchmark response (BMR) of 10% and background response (P₀) of 97.5% for both TT3 and FT3, the BMDL₁₀ of urine BBOEP concentration was 0.50 μg/L. Further, the corresponding DI of tris (2-butoxyethyl) phosphate (TBOEP), which is the precursor of BBOEP, was 2.53 μg/kg BW/d.</p><p><strong>Conclusions: </strong>Our findings suggest associations between gestational exposure to OPEs and altered THs biomarkers. According to the estimated BMD₁₀ (BMDL₁₀) of BBOEP and the corresponding DI, the current RfD of 15 μg/kg BW/d for TBOEP may not protect pregnant women and their newborns from thyroid disruption.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120639"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862809","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":"Catalytic degradation of Rhodamine B through peroxymonosulfate activation by the Co-doped hydroxyapatite.","authors":"Lei Wang, Yang Ruan, Zenghui Diao, Diyun Chen, Lingjun Kong","doi":"10.1016/j.envres.2024.120657","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120657","url":null,"abstract":"<p><p>Supported Co-based catalysts have shown attractive prospects for peroxymonosulfate (PMS) activation. In this work, Co-doped hydroxyapatite (H-Co/HAP) composites were prepared by a simple hydrothermal method. The Co content in H-Co/HAP could reach 71.2 mg/g, while the Co leaching rate remained relatively low. By right of the excellent catalytic performance, the as-prepared H-Co/HAP could achieve 99.02% degradation of Rhodamine B (RhB) within 10 minutes in the presence of 0.5 mM PMS and a first-order kinetic rate constant of 0.876 min^-1. Even after 8 cycles, the RhB degradation efficiency remained at 81.96%. In addition, the effects of vital reaction parameters, including catalyst dosage, PMS dosage, initial pH, humic acid, and coexisting anions, on the catalytic performance in the H-Co/HAP10/PMS system were systematically investigated and discussed. The degradation mechanism of a non-radical (¹O₂) as the dominant active specie and a radical (•O₂^- and SO₄^•-) as the minor active specie was identified through quenching experiments and electron paramagnetic resonance testing. Moreover, possible degradation pathways of RhB were proposed in the H-Co/HAP10/PMS system. Overall, this study offers a meaningful strategy for designing high-content Co-based catalysts to degrade dye molecules in wastewater.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120657"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862810","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":"Fabrication of a Novel Z-scheme 2D/1D g-C₃N₄/Polyaniline Decorated on Activated Carbon for Effective Visible-Light Photocatalytic Activity.","authors":"Hadis Saraee, Marjan Tanzifi, Mohsen Mansouri, Mehdi Saraee, Mohammad Tavakkoli Yaraki","doi":"10.1016/j.envres.2024.120658","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120658","url":null,"abstract":"<p><p>In recent years, visible-light driven photocatalysts present a significant role in different photocatalytic performances. Herein, a novel Z-scheme graphitic carbon nitride nanosheet/polyaniline nanowire (2D/1D CN/PAni) nanocomposite decorated on activated carbon (AC) support was synthesized by solution mixing combined with a calcination process for removal of CR dye under LED irradiation. The chemical, nanostructure, surface and optical properties of as-prepared nanocomposites were analyzed by different spectroscopic and microscopic techniques. The AC support had a fundamental role in modification of the surface area, preventing the CN/PAni accumulation and improving the separation of CN/PAni from the solution. The results of DRS and PL analyses displayed that the combining of CN nanosheet with PAni nanowire has an efficient role in the optical properties compared to pure CN. The effect of photo-reaction parameters such as CN/PAni loading on AC and CN/PAni/AC dosage on CR removal was examined. The CN/PAni/AC/light system presented effective degradation ability on CR, and the removal efficiency reached 91% after 100 min. The modified photocatalytic activity could be described by transferring photo-generated charges between 2D CN and 1D PAni via the Z-scheme mechanism. Furthermore, the CN/PAni decorated on AC support illustrated good recycling ability.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120658"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862816","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":"Optimizing carbon source addition to control surplus sludge yield via machine learning-based interpretable ensemble model.","authors":"Bowen Li, Li Liu, Zikang Xu, Kexun Li","doi":"10.1016/j.envres.2024.120653","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120653","url":null,"abstract":"<p><p>Appropriate carbon source addition can save operational costs and reduce surplus sludge yield in the wastewater treatment plant (WWTP). However, the link between carbon source and surplus sludge yield remains neglected although machine learning (ML) has become a powerful tool for WWTP, and is a challenge due to more complex multidimensional pattern recognition. Herein, weighted average ensemble strategy was conducted to assemble multiple diverse basic models to obtain better prediction capability to optimize carbon source addition (Model-1) and further control surplus sludge yield (Model-2). The ensemble models significantly outperformed all single models with MAE of 5.82 g/m³, MSE of 60.59 and R² value of 0.98 in Model-1 and MAE of 15.09 g/m³, MSE of 449.01 and R² value of 0.93 in Model-2. The optimal input feature subset was explored to reduce model complexity, indicating that the final ensemble models can predict with high precision using relatively few features with MAE of 6.41 g/m³, MSE of 78.49 and R² value of 0.97 in Model-1 and MAE of 12.82 g/m³, MSE of 232.71 and R² value of 0.95 in Model-2. Furthermore, the final models were deployed into an offline web application to facilitate their utility in real-world settings, demonstrating 47.25 % savings in carbon source addition and 15.89 % reductions in surplus sludge yield for an extra month of running. This work offers an efficient approach for the WWTP to optimize carbon source addition and provides new insights into controlling surplus sludge yield.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120653"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862820","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":"Evaluation of the buffer-blocking capacity of acrocarpous moss Campylopus schmidii as candidate for copper and cadmium migration.","authors":"Rong Zhang, Feiyun Huang, Zhuang Ju, Bo Mu, Peng Chen","doi":"10.1016/j.envres.2024.120643","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120643","url":null,"abstract":"<p><p>This study evaluates the ability of Campylopus schmidii to inhibit the horizontal migration of copper and cadmium under simulated acid rain conditions. Experiments at varying pH levels (3.6, 4.7, and 5.6) revealed significant reductions in copper and cadmium migration rates, especially at pH 3.6, where concentrations dropped to 3.68% and 30.98% of those in exposed soil after 90 days. No leachate residue was collected from moss-covered groups, indicating effective soil and water loss control. Transcriptome analysis identified numerous differentially expressed genes under cadmium stress, highlighting enriched pathways related to cell structure, signaling, and metabolism, demonstrating Campylopus schmidii 's complex molecular mechanisms for heavy metal stress adaptation. These findings underscore the potential of Campylopus schmidii for environmental restoration and pollution control in mining areas.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120643"},"PeriodicalIF":7.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862815","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":"Exploring multi-media geochemical relationships in the southeastern Amazonian basin: A way forward to define source and background levels of potentially toxic elements in lake sediments.","authors":"Prafulla Kumar Sahoo, José Tasso Felix Guimarães, Lourival Tyski, Luiza Santos Reis, Alessandro Sabá Leite, Markus Gastauer","doi":"10.1016/j.envres.2024.120648","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120648","url":null,"abstract":"<p><p>Understanding geochemical source-sink relationships is an important aspect for developing background values of potentially toxic elements (PTEs) in a lake basin. This approach was studied in the Araguaia belt of Amazonia, Brazil. A total of 96 sediments (from 13 lake cores LA1-LA13), 36 surface soils, and 19 catchment rocks were collected in 2022 and chemical analysis of these samples was performed in the fine fraction (< 177 μm) using XRF and ICP-MS. Results revealed that the PTEs concentration was significantly different (p < 0.05) between sediment, soil, and catchment rock, with more accentuated enrichment in rock followed by soils. The upper continental crust (UCC) normalization pattern shows that high enrichment of Fe, Ti, Ni, and Cr, and moderate enrichment of As, P and Cu in a few sediments, similar with catchment soils and crusts. Thus, the enrichment of PTE in lake sediments is mainly controlled by dominant catchment lithology, whereby mafic and ultra-mafic bodies are the main source of Cr, Ni and Cu, whilst meta-mafic (Couto Magalhães Formation) rocks are a primary source of As. Principal component analysis (PCA) also supported a strong source-sink geochemical relationship. It identified the major bedrock geochemical signature Cr-Ni-Co as 'mafic rocks' and Al-Ti-Nb-Ga-Zr-Hf-U-Th as 'resistant minerals', and REE group, which were nearly similar between lake sediments and catchment soils and rocks. Since the enrichment of PTE is clarified by geogenic origin, these lake sediments are best suitable for establishing geochemical background (GB). The new GB threshold values (estimated by mMAD method) for Cu, Cr, Pb and Ni are substantially higher than those specified by the Brazilian CONAMA guidelines, as well as the regional GB values of IRW. Since these high values were already evidenced in catchment materials, the new GB threshold values should be considered as a more realistic reference value for environmental risk assessment in the region. This is demonstrated in the anthropogenic risk assessment of PTEs (especially Cr and Ni) in lake sediments, which, when calculated using CONAMA guidelines, showed high to very high contamination, but mostly indicated low contamination with respect to new GB. This finding made it clear that the site-specific GB values must be incorporated in the sediment quality guideline and monitoring programme for contamination assessment and making environmental decision of a given region.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120648"},"PeriodicalIF":7.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851852","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 carbon dioxide on fermentation products, microbial community, and functional gene in food waste fermentation with uncontrol pH.","authors":"Xin-Rong Pan, Pei-Ken Shang-Guan, Shu-Hui Li, Chu-Hao Zhang, Jia-Min Lou, Liang Guo, Lu Liu, Yin Lu","doi":"10.1016/j.envres.2024.120645","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120645","url":null,"abstract":"<p><p>Food waste is a major problem faced by human beings. Acidogenic fermentation is an effective and feasible technology for resource recovery from food waste. The mixture of volatile fatty acids (VFAs) hinders the utilization of fermentation products. In this study, we constructed fermentation reactors for food waste treatment. The operation period was separated to three stages: Stage 1 (from day 1 to 102), Stage 2 (from day 103 to 208), and Stage 3 (from day 209 to 304). CO₂ was sparged to the reactors to promote the acetate enrichment at Stage 3. Bioinformatics analysis were performed to analyze the microbial community, genes, and pathways. Results showed that the highest average concentration of acetate was 6044 mg-COD/L (R1) and 5000 mg-COD/L (R2) at Stage 3, which was corresponded to the stage with highest acetate ratio (63% and 66% in R1 and R2). But the highest total VFAs concentration was 39424 mg-COD/L at Stage 2. Aeriscardovia belonging to Actinobacteria had an average relative abundance of 85.7% after CO₂ sparging. Comparing to Stage 1 and Stage 2, the number of down-regulated genes and pathways were much more than the number of up-regulated genes with CO₂ sparging. The significant down-regulated genes were wcaB and ttrC, and the significant down-regulated pathways were pyruvate fermentation to acetone and acetyl-CoA fermentation to butanoate II pathway. This study demonstrated that CO₂ can promote the acetate enrichment during food waste fermentation. The main mechanism was enriching acetate fermentation microorganisms and inhibiting the interfere genes and pathways.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120645"},"PeriodicalIF":7.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851651","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":"Co-occurrence of PFASs, TPHs, and BTEX in subsurface soils: Impacts on native microbial communities and implications for bioremediation.","authors":"Zhuanxia Zhang, Zeliang Liu, Frederic Coulon, Gubai Luo, Qing Wang, Xinyu Gao, Zhongyuan Li, Xin Song","doi":"10.1016/j.envres.2024.120650","DOIUrl":"https://doi.org/10.1016/j.envres.2024.120650","url":null,"abstract":"<p><p>This study investigates the co-occurrence of per- and polyfluoroalkyl substances (PFASs), petroleum hydrocarbons (TPHs) and benzene, toluene, ethylbenzene, and xylene (BTEX) and their effects on the indigenous microbial communities in soils at a contaminated site with a history of petroleum refinery operations. PFASs concentrations were in the range of 5.65 to 6.73 ng/g, and fluorooctane sulfonate (PFOS) and perfluorobutane sulfonic acid (PFBS) were the dominating compounds. No significant difference was observed in the PFASs concentration profiles between the site and background locations, indicating that PFASs detected in the soil samples were mainly contributed from non-point sources, due to the long-distance transport of PFASs in the region. The concentrations of TPHs and BTEX ranged from 227 to 72,360 mg/kg and 0.06 to 2109.77 mg/kg, respectively, mainly contributed by the historical refinery activities. The presence of PFASs, TPHs, and BTEX significantly impacted soil microbial community diversity and abundance, altering microbial compositions and enriching bacteria with higher resistance or metabolic capabilities against contamination. Strong correlations were observed between TPHs and its degraders such as Pseudomonas, Azoarcus, and Polaromonas. Significant positive relationship between PFASs and Trichlorobacter implied the potential defluorination capabilities of Trichlorobacter, warranting further investigation. Moreover, the higher energy metabolism including carbon, nitrogen and sulfur metabolisms and higher abundance of metabolic enzymes for alkane, cyclohexane and toluene in the refinery site revealed the potential occurrence of natural biodegradation of contaminants with indigenous microbial community. These findings highlight the complexity of sites contaminated with a mixture of traditional and emerging contaminants, providing valuable insights into the potential for biodegradation of mixed contaminants and underscoring the need for integrated approaches in environmental remediation strategies. This study contributes to understanding the ecological impacts of co-occurring contaminants and emphasizes the importance of considering multiple contaminant types in environmental risk assessments and remediation efforts.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"120650"},"PeriodicalIF":7.7,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851839","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}