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.

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

“…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.…”

“…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 .…”

Worldwide cases of water pollution by emerging contaminants: a review

“…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).…”

Emerging Contaminants: Analysis, Aquatic Compartments and Water Pollution

“…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).…”