CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
Environ Pollut. 2020 May;260:114087. doi: 10.1016/j.envpol.2020.114087. Epub 2020 Jan 29.
Halogenated flame retardants (HFRs) are ubiquitous in the environment, but little information is available about the bioaccumulation of HFRs in mangrove plants. In this study, three mangrove plant species were collected from Futian National Nature Reserve of Shenzhen City, South China to investigate the bioaccumulation of polybrominated diphenyl ethers (PBDEs) and several alternative halogenated flame retardants (AHFRs), including decabromodiphenyl ethane (DBDPE), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), hexabromobenzene (HBB), pentabromotoluene (PBT), tetrabromop-xylene (pTBX), pentabromoethylbenzene (PBEB) and dechlorane plus (DP). The mean concentrations of PBDEs, DBDPE, BTBPE, pTBX, PBT, PBEB, HBB and DP in mangrove plant species were 2010, 1870, 36.2, 18.7, 40.1, 17.8, 9.68 and 120 pg g dry weight, respectively. PBDEs were the dominant HFRs in mangrove plant tissues, followed by DBDPE. The relative abundance of BDE 209 in three mangrove plant tissues were much lower than those in sediments. Significant negative relationships between log root bioaccumulation factors and log K, and between log TF (from root to stem) and log K were observed, indicating that HFRs with low hydrophobicity were easily absorbed by mangrove roots and stems. A positive correlation between log TF (from stem to leaf) and log K were found, suggesting that air-leaf exchange may occur in mangrove plants. This study highlights the uptake of HFRs by mangrove plants, which can be used as remediation for HFRs contamination in the environment.
卤代阻燃剂（HFRs）在环境中普遍存在，但有关其在红树林植物中的生物积累的信息却很少。本研究从中国华南深圳市福田国家级自然保护区采集了 3 种红树林植物，以调查多溴二苯醚（PBDEs）和几种替代卤代阻燃剂（AHFRs），包括十溴二苯乙烷（DBDPE）、1,2-双（2,4,6-三溴苯氧基）乙烷（BTBPE）、六溴苯（HBB）、五溴甲苯（PBT）、四溴对二甲苯（pTBX）、五溴乙基苯（PBEB）和十氯代二苯并对二恶英（DP）的生物积累情况。红树林植物中 PBDEs、DBDPE、BTBPE、pTBX、PBT、PBEB、HBB 和 DP 的平均浓度分别为 2010、1870、36.2、18.7、40.1、17.8、9.68 和 120 pg g 干重。在红树林植物组织中，PBDEs 是主要的 HFRs，其次是 DBDPE。在三种红树林植物组织中 BDE 209 的相对丰度远低于沉积物中的相对丰度。在根系生物积累因子和 log K 之间，以及 TF（从根系到茎部）和 log K 之间观察到显著的负相关关系，表明疏水性低的 HFRs 容易被红树林根系和茎部吸收。在 TF（从茎到叶）和 log K 之间存在正相关关系，这表明空气-叶交换可能发生在红树林植物中。本研究强调了红树林植物对 HFRs 的吸收，这可用于修复环境中的 HFRs 污染。
