AhR-mediated activities and compounds in sediments of Meiliang Bay, Taihu Lake, China determined by in vitro bioassay and instrumental analysis

Xu, Yan; Wei, Si; Qin, Qingdong; Lam, Michael; Giesy, John P.

doi:10.1039/c5ra08412a

Cited by 6 publications

(4 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…51 Xu and colleagues reported as high as 0.7−1.6, 2.7−6.9, and 11.1−22.9 pg/g dw TEQs of PCBs, PCDD/Fs, and PAHs, respectively. 52 Our previous study on PCB dechlorination in Taihu Lake sediment microcosms found that meta and para dechlorination occurred within 51 weeks under nitrate reducing conditions. 53 To better understand the potential of long-term PCB dechlorination, the PCB dechlorination rate, preference, and pathways were tracked in Taihu Lake sediment microcosms.…”

Section: ■ Introductionmentioning

confidence: 95%

“…However, it has been suffering from various environmental issues. , Organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs), PCBs, polychlorinated dibenzo- p -dioxins, and dibenzofurans (PCDD/Fs) were frequently detected in water, sediments, and aquatic products. − However, most of the studies have focused on monitoring, source tracking, and ecological risk assessment. , The toxicity equivalents (TEQs) of PCDD/Fs in Taihu Lake sediments were higher than the threshold effect level of the sediment quality guidelines in Canada, ranging from 0.91 to 4.80 pg/g dw . Xu and colleagues reported as high as 0.7–1.6, 2.7–6.9, and 11.1–22.9 pg/g dw TEQs of PCBs, PCDD/Fs, and PAHs, respectively . Our previous study on PCB dechlorination in Taihu Lake sediment microcosms found that meta and para dechlorination occurred within 51 weeks under nitrate reducing conditions .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Long-Term Dechlorination of Polychlorinated Biphenyls (PCBs) in Taihu Lake Sediment Microcosms: Identification of New Pathways, PCB-Driven Shifts of Microbial Communities, and Insights into Dechlorination Potential

Tang

et al. 2021

Environ. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Microbial reductive dechlorination of polychlorinated biphenyls (PCBs) is regarded as an alternative approach for in situ remediation and detoxification in the environment. To better understand the process of PCB dechlorination in freshwater lake sediment, a long-term (108 weeks) dechlorination study was performed in Taihu Lake sediment microcosms with nine parent PCB congeners (PCB5, 12, 64, 71, 105, 114, 149, 153, and 170). Within 108 weeks, the total PCBs declined by 32.8%, while parent PCBs declined by 84.8%. PCB dechlorinators preferred to attack meta- and para-chlorines, principally para-flanked meta and single-flanked para chlorines. A total of 58 dechlorination pathways were observed, and 20 of them were not in 8 processes, suggesting the broad spectrum of PCB dechlorination in the environment. Rare ortho dechlorination was confirmed to target the unflanked ortho chlorine, indicating a potential for complete dechlorination. PCBs drove the shifts of the microbial community structures, and putative dechlorinating bacteria were growth-linked to PCB dechlorination. The distinct jump of RDase genes ardA, rdh12, pcbA4, and pcbA5 was found to be consistent with the commencement of dechlorination. The maintained high level of putative dechlorinating phylum Chloroflexi (including Dehalococcoides and o-17/DF-1), genus Dehalococcoides, and four RDase genes at the end of incubation revealed the long-term dechlorination potential. This work provided insights into dechlorination potential for long-term remediation strategies at PCB-contaminated sites.

show abstract

Section: ■ Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Long-Term Dechlorination of Polychlorinated Biphenyls (PCBs) in Taihu Lake Sediment Microcosms: Identification of New Pathways, PCB-Driven Shifts of Microbial Communities, and Insights into Dechlorination Potential

Tang

et al. 2021

Environ. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, persistent organic pollutants newly added to the Stockholm Convention, such as polychlorinated naphthalenes, perfluorinated compounds, and hexabromocyclododecane, are currently rarely studied in the Caspian Sea at present. Persistent organic pollutants, including organochlorine pesticides, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans, polycyclic aromatic hydrocarbons, polybrominated diphenyl ethers, polychlorinated naphthalenes, hexabromocyclododecane, perfluorinated compounds, and tetrabromobisphenol A, are also present in different environmental compartments and biota in Chinese lake ecosystems (Qiu et al 2004;Zhang and Jiang 2005;Qiao et al 2006;Wang et al 2007Wang et al , 2016aWang et al , 2016bWen et al 2008;Yang et al 2011;Yu et al 2012;Zhang et al 2012;Zhou et al 2012aZhou et al , 2012bXu et al 2013Xu et al , 2015Cui 2018;Liu et al 2018;Wei et al 2019;Xiang et al 2019).…”

Section: Persistent Organic Pollutants In Lake and Ocean Ecosystemsmentioning

confidence: 99%

Worldwide cases of water pollution by emerging contaminants: a review

et al. 2022

View full text Add to dashboard Cite

Water contamination by emerging contaminants is increasing in the context of rising urbanization, industrialization, and agriculture production. Emerging contaminants refers to contaminants for which there is currently no regulation requiring monitoring or public reporting of their presence in our water supply or wastewaters. There are many emerging contaminants such as pesticides, pharmaceuticals, drugs, cosmetics, personal care products, surfactants, cleaning products, industrial for-mulations and chemicals, food additives, food packaging, metalloids, rare earth elements, nanomaterials, microplastics, and pathogens. The main sources of emerging contaminants are domestic discharges, hospital effluents, industrial wastewaters, runoff from agriculture, livestock and aquaculture, and landfill leachates. In particular, effluents from municipal wastewater treatment plants are major contributors to the presence of emerging contaminants in waters. Although many chemicals have been recently regulated as priority hazardous substances, conventional plants for wastewater and drinking water treat-ment were not designed to remove most emerging contaminants. Here, we review key examples of contamination in China, Portugal, Mexico, Colombia, and Brazil. Examples include persistent organic pollutants such as polychlorinated biphenyls, dibenzofurans, and polybrominated diphenyl ethers, in lake and ocean ecosystems in China; emerging contaminants such as alkylphenols, natural and synthetic estrogens, antibiotics, and antidepressants in Portuguese rivers; and pharmaceuticals, hormones, cosmetics, personal care products, and pesticides in Mexican, Brazilian, and Colombian waters. All continents are affected by these contaminants. Wastewater treatment plants should therefore be upgraded, e.g., by addition of tertiary treatment systems, to limit environmental pollution.

show abstract

“…However, persistent organic pollutants newly added to the Stockholm Convention, such as polychlorinated naphthalenes, perfluorinated compounds, hexabromocyclododecane, etc., are rarely studied in the Caspian Sea at present. Persistent organic pollutants, including organochlorine pesticides, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans, polycyclic aromatic hydrocarbons, polybrominated diphenyl ethers, polychlorinated naphthalenes, hexabromocyclododecane, perfluorinated compounds and tetrabromobisphenol A, are also present in different environmental compartments and biota in Chinese lake ecosystems (Qiu et al 2004;Zhang and Jiang 2005;Qiao et al 2006;Wang et al 2007;Wen et al 2008;Yang et al 2011;Yu et al 2012;Zhang et al 2012;Zhou et al 2012a, b;Xu et al 2013Xu et al , 2015Wang et al 2016a, b;Cui 2018;Liu et al 2018;Wei et al 2019;Xiang et al 2019).…”

Section: Persistent Organic Pollutants In Lake and Ocean Ecosystemsmentioning

confidence: 99%

Emerging Contaminants: Analysis, Aquatic Compartments and Water Pollution

Morin‐Crini¹,

Lichtfouse²,

Liu³

et al. 2021

Emerging Contaminants Vol. 1

View full text Add to dashboard Cite

Over the past two decades, the presence of so-called emerging contaminants in various environmental compartments around the world, such as water, sediments, soils and atmosphere, and in a wide variety of consumer products has become a major concern for society, public health authorities, industry (namely food industry and water sector) and the agricultural sector. Some of these substances are endocrine disruptors and others are proven carcinogens and mutagens. In particular,

show abstract

AhR-mediated activities and compounds in sediments of Meiliang Bay, Taihu Lake, China determined by in vitro bioassay and instrumental analysis

Abstract: Greater concentrations of TCDD-EQs and lesser concentrations of TEQs were found and a gradual decrease of AhR potency was confirmed.

Cited by 6 publications

References 37 publications

Long-Term Dechlorination of Polychlorinated Biphenyls (PCBs) in Taihu Lake Sediment Microcosms: Identification of New Pathways, PCB-Driven Shifts of Microbial Communities, and Insights into Dechlorination Potential

Long-Term Dechlorination of Polychlorinated Biphenyls (PCBs) in Taihu Lake Sediment Microcosms: Identification of New Pathways, PCB-Driven Shifts of Microbial Communities, and Insights into Dechlorination Potential

Worldwide cases of water pollution by emerging contaminants: a review

Emerging Contaminants: Analysis, Aquatic Compartments and Water Pollution

Contact Info

Product

Resources

About