文献类型：期刊文献

英文题名：Bioaccumulation and translocation of tetrabromobisphenol A and hexabromocyclododecanes in mangrove plants from a national nature reserve of Shenzhen City, South China

作者：Li, Huawei[1,2,7] Hu, Yongxia[1,2] Sun, Yuxin[1,2,3,4] De Silva, Amila O.[4] Muir, Derek C. G.[4] Wang, Weiwei[1,2,7] Xie, Jinli[1,2,7] Xu, Xiangrong[1,2,3] Pei, Nancai[5] Xiong, Yanmei[5] Luo, Xiaojun[6] Mai, Bixian[6]

第一作者：Li, Huawei

通信作者：Sun, YX[1];Sun, YX[2]

机构：[1]Chinese Acad Sci, CAS Key Lab Trop Marine Bioresources & Ecol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China;[2]Chinese Acad Sci, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China;[3]Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou 510301, Guangdong, Peoples R China;[4]Environm & Climate Change Canada, Aquat Contaminants Res Div, Burlington, ON L7S 1A1, Canada;[5]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[6]Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China;[7]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2019

卷号：129

起止页码：239-246

外文期刊名：ENVIRONMENT INTERNATIONAL

收录：;EI(收录号：20192206981782);Scopus(收录号：2-s2.0-85066064130);WOS:【SCI-EXPANDED(收录号:WOS:000470239200024)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 41573084, 31570594 and 41776103), the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA13020101), National Key Research and Development Program of China (No. 2018YFC1406503), the Pearl River Science and Technology Nova Program of Guangzhou, China (No. 201806010079), the Talent Support Project of Guangdong Province, China (No. 201629019), the China Scholarship Council (No. 201808440051) and the Science and Technology Planning Project of Guangdong Province, China (No. 2017B030314052).

语种：英文

外文关键词：Tetrabromobisphenol A; Hexabromocyclododecanes; Bioaccumulation; Translocation; Mangrove plants

摘要：Brominated flame retardants (BFRs) such as tetrabromobisphenol A (TBBPA) and hexabromocyclododecanes (HBCDs) are of ecological concern due to their ubiquitous presence and adverse effects. There is a paucity of data on environmental fate of such compounds in mangrove wetlands, which are unique ecosystems in coastal intertidal areas and act as natural sinks for many pollutants. In this study, mangrove plants and sediments were collected from an urban nature reserve in South China to investigate bioaccumulation and translocation of TBBPA and HBCDs. The mean (range) concentrations of TBBPA and Sigma HBCD in roots, stems and leaves were 67 (< MDL-999), 174 (0.73-1105) and 20 (0.59-250) pg/g dry weight (dw), and 329 (15.6-2234), 766 (32.9-3255) and 298 (19.9-1520) pg/g dw, respectively. Tissue-specific accumulations were observed, varying with plant species and compounds. HBCD diastereoisomer patterns were similar for all plant species. gamma-HBCD was the major diastereoisomer in roots, while alpha-HBCD dominated in stems and leaves. The predominance of alpha-HBCD in aboveground tissues may be ascribed to diastereoisomer-specific translocation, isomerization and/or metabolization in mangrove plants. Preferential enrichment of ( - )-alpha-, ( - )-beta- and ( + )-gamma-HBCDs was found in all mangrove plant tissues, suggesting the enantioselectivity for HBCDs in mangrove plants. Translocation factors (log TF, root to stem) of HBCD diastereoisomers and log K-ow were negatively correlated (p = 0.03), indicating passive translocation of HBCDs, driven by water movement during transpiration. Sediment-root bioaccumulation factors and log TFs (stem to leaf) both showed no obvious correlation with log K-ow of HBCD diastereoisomers. These results reflected the complex behavior of HBCDs in mangrove plants, which have not been sufficiently captured in laboratory-based studies of plant contaminant accumulation.