Journal of Environmental Sciences-china最新文献_第7页

Bioaccumulation of legacy and emerging per- and polyfluoroalkyl substances in hydroponic lettuce and risk assessment for human exposure

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-31 DOI: 10.1016/j.jes.2024.08.028

Qi Jin , Yuwei Zhang , Yilin Gu , Yali Shi , Yaqi Cai

{"title":"Bioaccumulation of legacy and emerging per- and polyfluoroalkyl substances in hydroponic lettuce and risk assessment for human exposure","authors":"Qi Jin , Yuwei Zhang , Yilin Gu , Yali Shi , Yaqi Cai","doi":"10.1016/j.jes.2024.08.028","DOIUrl":"10.1016/j.jes.2024.08.028","url":null,"abstract":"<div><div>Reclaimed water for irrigation or hydroponic cultivation provides exposure pathways for per- and polyfluoroalkyl substances (PFAS) to enter the human food chain. This study employed hydroponic methods to investigate the behavior of legacy PFAS and emerging chlorinated polyfluoroalkyl ether sulfonic acids (Cl-PFESAs) in lettuce grown under environment-related exposure levels and assessed the human exposure risks from consuming contaminated lettuce. Overall, PFAS in lettuce were concentration-dependent, with long-chain PFAS tending to accumulate in roots and short-chain PFAS accumulating more in shoots. The enrichment of PFAS in lettuce was jointly influenced by their chain length and polar functional groups. Specifically, the root concentration factors (RCFs) of PFAS generally increased with increasing chain length, and RCF values of most perfluoroalkanesulfonic acids (PFSAs) were significantly higher than those of perfluoroalkyl carboxylic acids (PFCAs) with the same chain length (<em>p</em> < 0.01), while the translocation factors (TFs) exhibited opposite trends. RCF values of perfluorooctane sulfonate (PFOS) and its alternatives, Cl-PFESAs, were ranked as follows: 8:2 Cl-PFESA (mean: 139) > 6:2 Cl-PFESA (28.6) > PFOS (25.7), which was attributed to the increased molecular size and hydrophobicity resulting from the insertion of ether bonds and additional CF<sub>2</sub> in 8:2 Cl-PFESA. Notably, TF value of 8:2 Cl-PFESA (mean: 0.007) was the smallest among all PFAS, indicating 8:2 Cl-PFESA was difficult to transfer to nutritional compartments. Adults and children would exceed the most conservative health-based reference dose (RfD) by consuming approximately 15.9–148 g and 7.92–74.0 g of contaminated lettuce per day, implying high health risks.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 378-389"},"PeriodicalIF":5.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Effects of PM2.5 exposure on hematopoiesis and coupled immune disorder in adult male mice

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-31 DOI: 10.1016/j.jes.2024.08.030

Li Ma , Yang Wang , Hao Wang , Lingyu Ren , Yuqiong Guo , Liyao Qin , Zhihua Gong , Guangke Li , Nan Sang

{"title":"Effects of PM2.5 exposure on hematopoiesis and coupled immune disorder in adult male mice","authors":"Li Ma , Yang Wang , Hao Wang , Lingyu Ren , Yuqiong Guo , Liyao Qin , Zhihua Gong , Guangke Li , Nan Sang","doi":"10.1016/j.jes.2024.08.030","DOIUrl":"10.1016/j.jes.2024.08.030","url":null,"abstract":"<div><div>Fine particulate matter, namely PM<sub>2.5</sub>, increases the risk of morbidity and mortality in various systems, including the hematopoietic and immune systems. However, there is limited experimental evidence supporting the association between PM<sub>2.5</sub> exposure and hematopoietic outcomes as most studies focus on epidemiological data. In this study, adult male mice were exposed to PM<sub>2.5</sub> for a long time to investigate hematopoietic toxicity. There were significant increases in red blood cells (RBC), hemoglobin (HGB), and white blood cells (WBC) in peripheral blood after 5-month real-environmental PM<sub>2.5</sub> exposure, indicating elevated circulatory inflammation and potential hematopoietic abnormality. Moreover, we observed abnormal proliferation and differentiation of hematopoietic stem and progenitor cells (HSPCs), along with altered mRNA levels of hematopoietic genes and increased proinflammatory factors in the bone marrow (BM). Transcriptomic analysis of BM cells suggested that PM<sub>2.5</sub> exposure activated immune responses associated with lymphocytes. Then, PM<sub>2.5</sub> exposure via intratracheal instillation was performed for 8 weeks to verify the toxic effect. The results of the complete blood count were similar to those of real-environmental exposure, with drastic changes in the number and function of HSPCs, as well as mRNA levels of the hematopoietic genes and increased inflammatory factors in the BM being detected. Furthermore, lymphocyte subsets changed significantly in the BM and spleen, confirming immune disorder following PM<sub>2.5</sub> exposure. In conclusion, PM<sub>2.5</sub> interfered with the process of BM hematopoiesis by triggering inflammation and leading to immune disorder. Our study provided experimental evidence for the hematopoietic toxicity of PM<sub>2.5</sub> and highlighted the significance of reducing air pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 442-453"},"PeriodicalIF":5.9,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421641","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}

引用次数: 0

Heavy metals are liver fibrosis risk factors in people without traditional liver disease etiologies

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-30 DOI: 10.1016/j.jes.2024.08.027

Ning Ma , Meena B. Bansal , Jaime Chu , Mark Woodward , Andrea D. Branch

{"title":"Heavy metals are liver fibrosis risk factors in people without traditional liver disease etiologies","authors":"Ning Ma , Meena B. Bansal , Jaime Chu , Mark Woodward , Andrea D. Branch","doi":"10.1016/j.jes.2024.08.027","DOIUrl":"10.1016/j.jes.2024.08.027","url":null,"abstract":"<div><div>Liver fibrosis is an important predictor of mortality. Liver disease case definitions changed in 2023. These definitions include an easily over-looked group with no traditional etiology (NTE) of liver disease and no steatosis. We analyzed heavy metals and cardiometabolic risk factors (CMRFs) as fibrosis risk factors in the NTE group and in people with another newly-defined condition, metabolic dysfunction-associated steatotic liver disease (MASLD). Two National Health and Nutrition Examination Survey (NHANES) datasets were analyzed. In NHANES III (1988–1994), fibrosis and steatosis were defined by Fibrosis-4 scores and ultrasound, respectively, in 12,208 adults. In NHANES 2017–2020, fibrosis and steatosis were defined by transient elastography and the controlled attenuation parameter (CAP) in 5525 adults. Fibrosis risk factors varied over time and by race/ethnicity. In the earlier dataset, NTE-fibrosis had a positive, non-significant, association with high blood levels of lead (Pb). MASLD-fibrosis was associated with Pb (OR = 2.5, 95 % CI, 1.4–4.4) and not with CMRFs in non-Hispanic Blacks but was associated with CMRFs in non-Hispanic Whites. Heavy metal exposures fell between the two time periods. In the later dataset, NTE-fibrosis was associated with Pb (OR = 4.2, 95 % CI, 2.6–6.8) and cadmium (OR = 1.8, 95 % CI, 1.1–3.0) in the total population, but not with most CMRFs. MASLD-fibrosis was strongly-significantly associated with CMRFs in every racial/ethnic group except non-Hispanic Blacks in whom CMRFs were only weakly associated with MASLD-fibrosis. Heavy metal pollution, which disproportionately impacts minoritized populations, decreased over time, but remained strongly associated with liver fibrosis in people lacking traditional etiological factors for liver disease.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 329-342"},"PeriodicalIF":5.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143351173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

引用次数: 0

Virus communities rather than bacterial communities contribute more on nutrient pool in polluted aquatic environment

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-30 DOI: 10.1016/j.jes.2024.08.026

Qiaoling Yu , Xueqian Hu , Yuan Qian , Yu Wang , Chenwei Shi , Rui Qi , Petr Heděnec , Zhibiao Nan , Huan Li

{"title":"Virus communities rather than bacterial communities contribute more on nutrient pool in polluted aquatic environment","authors":"Qiaoling Yu , Xueqian Hu , Yuan Qian , Yu Wang , Chenwei Shi , Rui Qi , Petr Heděnec , Zhibiao Nan , Huan Li","doi":"10.1016/j.jes.2024.08.026","DOIUrl":"10.1016/j.jes.2024.08.026","url":null,"abstract":"<div><div>The degradation of animal carcasses can lead to rapid waste release (e.g., pathogenic bacteria, viruses, prions, or parasites) and also result in nutrient accumulation in the surrounding environment. However, how viral profile responds and influences nutrient pool (carbon (C), nitrogen (N), phosphorus (P) and sulfur (S)) in polluted water caused by animal carcass decomposition had not been explored. Here, we combined metagenomic analysis, 16S rRNA gene sequencing and water physicochemical assessment to explore the response of viral communities under different temperatures (23 °C, 26 °C, 29 °C, 32 °C, and 35 °C) in water polluted by cadaver, as well as compare the contribution of viral/bacterial communities on water nutrient pool. We found that a total of 15,240 viral species were classified and mainly consisted of Siphoviridae. Both temperature and carrion reduced the viral diversity and abundance. Only a small portion of the viruses (∼8.8 %) had significant negative correlations with temperature, while most were not sensitive. Our results revealed that the viruses had lager contribution on nutrient pool than bacteria. Besides, viral-related functional genes involved in C, N, P and S cycling. These functional genes declined during carcass decomposition and covered part of the central nutrient cycle metabolism (including carbon sugar transformation, denitrification, P mineralization and extracelluar sulfate transfer, etc.). Our result implies that human regulation of virus communities may be more important than bacterial communities in regulating and managing polluted water quality and nutrition</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 550-562"},"PeriodicalIF":5.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151624","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}

引用次数: 0

Shining a light on environmental science: Recent advances in SERS technology for rapid detection of persistent toxic substances

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-29 DOI: 10.1016/j.jes.2024.08.022

Zhenli Sun , Xunlong Ji , Shaoyu Lu , Jingjing Du

引用次数: 0

The heading stage: A critical period for schwertmannite in reducing arsenic accumulation in rice (Oryza sativa L.)

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-29 DOI: 10.1016/j.jes.2024.08.025

Yan Dong , Jiawei Yang , Ru Wang , Bo Zhou , Mingjiang Zhang , Guanyu Zheng , Lixiang Zhou

{"title":"The heading stage: A critical period for schwertmannite in reducing arsenic accumulation in rice (Oryza sativa L.)","authors":"Yan Dong , Jiawei Yang , Ru Wang , Bo Zhou , Mingjiang Zhang , Guanyu Zheng , Lixiang Zhou","doi":"10.1016/j.jes.2024.08.025","DOIUrl":"10.1016/j.jes.2024.08.025","url":null,"abstract":"<div><div>Schwertmannite, a common iron-derived mineral, is known for its high efficiency in adsorbing As from water and reducing the mobility and availability of As in soils. However, few studies have examined the critical period for the effectiveness of schwertmannite in hindering As uptake by rice plants, particularly its impact on the uptake and transport of As across different growth stages of rice. In this study, hydroponic experiments were performed to explore the absorption and translocation of As (500 µg/L As(III) or As(V)), when combined with schwertmannite, in rice during all growth stages. The results showed that As concentration in roots, stems and leaves increased with rice growth, while the addition of schwertmannite reduced the As concentration in all parts of rice, compared to the control without schwertmannite. Besides, schwertmannite application mitigated the harmful impact of As on rice yield, and reduced As levels in grains by 66 %-90 % compared to treatments with only As(III) or As(V). The heading stage is identified as a critical period for applying schwertmannite to reduce As uptake in rice. Specifically, during the heading stages, the plants uptake 85 %-91 % of the As contents in the absence of schwertmannite. However, adding schwertmannite retained about 84 %-90 % of As content, significantly reducing its absorption by rice plants at this stage. Therefore, maintaining As adsorption by schwertmannite up to the heading stage is beneficial to effectively reduce As uptake in rice and lower As concentration in rice grains.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 602-614"},"PeriodicalIF":5.9,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152114","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}

引用次数: 0

Research progress on environmental behavior of arsenic in Qinghai-Tibet Plateau soil

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-28 DOI: 10.1016/j.jes.2024.08.021

Xitong Li, Chuangchuang Zhang, Aofan Wang, Tieliang Zhang, Zeying He, Yujie Zhao, Wenjing Liu, Qiwen Zhou

{"title":"Research progress on environmental behavior of arsenic in Qinghai-Tibet Plateau soil","authors":"Xitong Li, Chuangchuang Zhang, Aofan Wang, Tieliang Zhang, Zeying He, Yujie Zhao, Wenjing Liu, Qiwen Zhou","doi":"10.1016/j.jes.2024.08.021","DOIUrl":"10.1016/j.jes.2024.08.021","url":null,"abstract":"<div><div>The Qinghai-Tibet Plateau, with its high altitude and cold climate, is one of the most fragile ecological environments in China and is distinguished by its naturally elevated arsenic (As) levels in the soil, largely due to its rich mineral and geothermal resources. This review provides a comprehensive analysis of As content, focusing on its distribution, environmental migration, and transformation behavior across the plateau. The review further evaluates the distribution of As in different functional areas, revealing that geothermal fields (107.2 mg/kg), mining areas (53.8 mg/kg), and croplands (39.3 mg/kg) have the highest As concentrations, followed by river and lake sediments and adjacent areas (33.1 mg/kg). These elevated levels are primarily attributed to the presence of As-rich minerals, such as arsenopyrite and pyrite. Additionally, human activities, including mining and geothermal energy production, exacerbate the release of As into the environment. The review also highlights the role of local microorganisms, particularly those from the phyla Proteobacteria and Actinobacteria, which possess As metabolic genes that facilitate As translocation. Given the unique climatic conditions of the plateau, conventional methods for As control may not be fully effective. However, the review identifies promising remediation strategies that are environmentally adaptable, such as the use of local microorganisms, specific adsorbents, and integrated technologies, which offer potential solutions for managing and utilizing As-contaminated soils on the plateau.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"153 ","pages":"Pages 237-250"},"PeriodicalIF":5.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143039497","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}

引用次数: 0

Generative discovery of safer chemical alternatives using diffusion modeling: A case study in green solvent design for cyclohexane/benzene extractive distillation

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-28 DOI: 10.1016/j.jes.2024.08.014

Zhichao Tan , Kunsen Lin , Youcai Zhao , Tao Zhou

{"title":"Generative discovery of safer chemical alternatives using diffusion modeling: A case study in green solvent design for cyclohexane/benzene extractive distillation","authors":"Zhichao Tan , Kunsen Lin , Youcai Zhao , Tao Zhou","doi":"10.1016/j.jes.2024.08.014","DOIUrl":"10.1016/j.jes.2024.08.014","url":null,"abstract":"<div><div>Over the past century, advancements in chemistry have significantly propelled human innovation, enhancing both industrial and consumer products. However, this rapid progression has resulted in chemical pollution increasingly surpassing planetary boundaries, as production and release rates have outpaced our monitoring capabilities. To catalyze more impactful efforts, this study transitions from traditional chemical assessment to inverse chemical design, introducing a generative graph latent diffusion model aimed at discovering safer alternatives. In a case study on the design of green solvents for cyclohexane/benzene extraction distillation, we constructed a design database encompassing functional, environmental hazards, and process constraints. Virtual screening of previous design dataset revealed distinct trade-off trends between these design requirements. Based on the screening outcomes, an unconstrained generative model was developed, which covered a broader chemical space and demonstrated superior capabilities for structural interpolation and extrapolation. To further optimize molecular generation towards desired properties, a multi-objective latent diffusion method was applied, yielding 19 candidate molecules. Of these, 7 were identified in PubChem as the most viable green solvent candidates, while the remaining 12 as potential novel candidates. Overall, this study effectively designed green solvent candidates for safer and more sustainable industrial production, setting a promising precedent for the development of environmentally friendly alternatives in other areas of chemical research.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 390-401"},"PeriodicalIF":5.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151563","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}

引用次数: 0

Application of algal-mycelial pellets in the treatment of the mariculture wastewater

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-24 DOI: 10.1016/j.jes.2024.08.018

Shanshan Chen , Sujie Li , Xunan Yang , Yaobin Lu , Lijuan Luo , Jie Xu , Kin-Chuang Ho , Tiangang Luan

{"title":"Application of algal-mycelial pellets in the treatment of the mariculture wastewater","authors":"Shanshan Chen , Sujie Li , Xunan Yang , Yaobin Lu , Lijuan Luo , Jie Xu , Kin-Chuang Ho , Tiangang Luan","doi":"10.1016/j.jes.2024.08.018","DOIUrl":"10.1016/j.jes.2024.08.018","url":null,"abstract":"<div><div>Hypersaline mariculture wastewater necessitates treatment prior to its discharge into marine environments. Algal-mycelial pellets (AMPs), known for their cost-effectiveness, energy efficiency and sustainability, have not been previously explored for their flocculation and pollutant removal capabilities in hyperhaline conditions. This work employed an orthogonal test design to investigate the effects of nine factors at three levels on the treatment efficiency of mariculture wastewater using <em>Chlorella</em> sp. TNBR1 and <em>Aspergillus niger</em> AMPs. The comprehensive optimal conditions for achieving the highest flocculation efficiency and pollutant removal are determined to be a temperature of 30 °C, light intensity of 6000 lux, a 12:0 light-dark cycle, an initial pH of 6, a microalgal density of 11.25 × 10<sup>6</sup> cell/mL, microalgal growth phase at the early logarithmic stage, a fungal spore density of 9.00 × 10<sup>5</sup> spore/mL and a fungal pellet phase of 60 h. Under such conditions, the treatment of nonsterile actual mariculture wastewater with <em>Chlorella</em> sp. TNBR1 and <em>Aspergillus niger</em> AMPs results in a 93.35 %±7.20 % reduction in chemical oxygen demand (COD), 92.83 %±7.29 % reduction in total nitrogen (TN), 100 % removal of total phosphorus (TP), and a flocculation efficiency of 69.21 %±5.36 %. These findings confirm that AMPs are a viable solution for effectively treating COD, TN and TP in real hypersaline mariculture wastewater, while also facilitating the flocculation and harvesting of microalgae.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 128-137"},"PeriodicalIF":5.9,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151012","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}

引用次数: 0

Effects of engineering injection and supplement mode of in-situ biogeochemical transformation enhancement EVO-FeSO4 on the remediation of tetrachloroethylene contaminated aquifer

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2024-08-24 DOI: 10.1016/j.jes.2024.08.017

Chen Sun , Jun Dong

{"title":"Effects of engineering injection and supplement mode of in-situ biogeochemical transformation enhancement EVO-FeSO4 on the remediation of tetrachloroethylene contaminated aquifer","authors":"Chen Sun , Jun Dong","doi":"10.1016/j.jes.2024.08.017","DOIUrl":"10.1016/j.jes.2024.08.017","url":null,"abstract":"<div><div>Traditional in situ biogeochemical transformation suffers from competition among crucial microorganisms and inadequate formation of reactive minerals, thus leading to the accumulation of toxic intermediates. In this study, three regulation schemes were proposed to solve these problems from the perspective of engineering mode. Results showed intermittent injection mode effectively reduced the accumulation of toxic intermediates but the reduction rate of tetrachloroethylene was decreased. And periodical supplementation of carbon and sulfur sources accelerated the removal of tetrachloroethylene but failed to reduce the accumulation of toxic products. While, regular supplementation of sulfate effectively weakened the competition of methanogens and increased the iron sulfide proportion on the surface of the minerals, thus reducing the accumulation of toxicity. Based on the results, this study obtained an effective engineering approach for practical site application. In addition, the main forms of active minerals capable of β-eliminating contaminants during biogeochemical transformation were identified in this study, including FeS, FeS<sub>2</sub>, and Fe<sub>3</sub>S<sub>4</sub>. Furthermore, the engineered regulatory mechanism of this study was summarized through the analysis of microbial community structure and mineral morphology. The amendment promotes the production of minerals and thus controls the transformation pathway of contaminants by altering the abundance of sulfate-reducing bacteria and dissimilatory iron reducing bacteria. This mechanism can provide a basis for subsequent theoretical studies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"154 ","pages":"Pages 200-211"},"PeriodicalIF":5.9,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143151021","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}

引用次数: 0