Brominated flame retardants in surface sediment from Western Guangdong,South China:Occurrence,distribution and toxicity in Caenorhabditis elegans  

作　　者：Xiaoxia Chen Ping Ding Haibo Chen Tingzhen Li Min Zhang Yunjiang Yu Guocheng Hu 

机构地区：[1]State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment,South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510655,China [2]Institute for Environmental pollution and health,School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China [3]Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir,Chongqing Three Gorges University,Chongqing 404000,China

出　　处：《Journal of Environmental Sciences》2024年第11期97-106,共10页环境科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2022YFC3902102 and 2019YFC1803403);the Key Programof National Natural Science Foundation of China(No.41931298).

摘　　要：Sediment is the ultimate sink of environmental pollutants.A total of 128 surface sediment sampleswere collected from8 rivers and 3 reservoirs in Maoming City,Guangdong Province.This study assessed the content and distribution of brominated flame retardants in sediments.The acute toxicity effects of tetrabromobisphenol A(TBBPA)and hexabromocyclododecane(HBCDs)in sediments were evaluated using Caenorhabditis elegans as model organisms.The concentration of TBBPA in sediments ranged from not detected(ND)to 12.59μg/kg andwas mainly distributed in the central area,whichwas affected by the emission of TBBPA from residential and factory.The concentration of HBCDs ranged from ND to 6.31μg/kg,and the diastereoisomer distribution was consistent,showing a trend close to the South China Sea.The composition pattern of HBCDs in the surface sediments from rivers were 41.73%-62.33%,7.89%-25.54%,and 18.76%-40.65%forα-,β-,andγ-HBCD,respectively,and in the sediments from reservoirs were 26.15%-45.52%,7.44%-19.23%,and 47.04%-61.89%forα-,β-,andγ-HBCD,respectively.When the sum of concentrations of TBBPA and HBCD in sediments were above high levels,reactive oxygen species in nematodes significantly increased,resulting in an oxidative stress response.Intestinal permeabilitywas also enhanced,causing intestinal damage.In addition,in terms of this study,TBBPA had a greater impact on biotoxicity compared to HBCDs,and more attention should be paid to the toxic effects of the river ecosystem organisms in Maoming City,Guangdong Province.This study can complement the pollution database in the study area and provide basic data for pollution control.

关 键 词：Tetrabromobisphenol A(TBBPA) Hexabromocyclododecane(HBCDs) Sediment Caenorhabditis elegans Biotoxicity 

分 类 号：X52[环境科学与工程—环境工程]