| |
| |
|
|
|
|
| |
 |
Marine pollution, ecotoxicology and sustainability
|
| |
|
|
Bioaccumulation of Tetrabromobisphenol A and Hexabromocyclododecane in Mangrove Plants from the Pearl River Estuary
Monday 7th @ 1030-1050, Conference Room 7
Huawei Li* , 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
Weiwei Wang, 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
Yongxia Hu, 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Yuxin Sun, 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Xiangrong Xu, 1 CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Presenter Email: soledadlee1227@163.com |
| Tetrabromobisphenol A (TBBPA) and hexabromocyclododecane (HBCD) are two common brominated flame retardants widely used in construction, textile and electronics industries. Due to their characteristics as persistent organic pollutants, TBBPA and HBCD have attracted worldwide attention and have been frequently detected in various environmental matrices. However, field researches on the behavior of TBBPA and HBCD in plants are still limited. In the present study, root, stem and leaf samples of three mangrove plant species (Bruguiera sexangula, Kandelia candel and Avicennia marina) were collected from Futian Mangrove Nature Reserve in Shenzhen city of China to investigate the bioaccumulation and translocation of TBBPA and HBCD in plants. Concentrations of TBBPA and HBCD were in the range of root > leaf, while those in A. marina were of root > leaf > stem. y-HBCD was the major diastereoisomer in the root samples for all the three species, followed by a- and b-HBCD, with mean contributions of 65.6%, 29.2% and 5.2%, respectively. However, a-HBCD dominated in the stem and leaf samples, with average ratios of 68.9% and 56.9%, respectively. The predominance of a-HBCD in aboveground tissues may be a result of diastereoisomer-specific translocation, isomerization and/or metabolization within plants. A preferential enrichment of (-)-a-, (-)-b- and (+)-y-HBCD was found in all tissues of all species, which may be attributed to the enzymes in plants. Soil-root concentration factors (log RCFs) and stem-leaf translocation factors (log TFs) both showed no obvious correlation with log Kow. Root-stem translocation factors (log TFs) and log Kow were significantly positively correlated (p < 0.05) for the HBCD diastereoisomers, indicating that HBCD may be transported from root to aboveground tissues by transpiration stream. |
|
|
|
|
|
|
|
|