多溴联苯醚（PBDEs）、得克隆（DP）等卤代阻燃剂具有持久性有机污染物的特性，其引起的环境污染问题已经成为环境科学的研究热点。而PBDEs衍生物（OH-PBDEs和MeO-PBDEs）、DP衍生物等具有跟阻燃剂本身相似甚至更强的毒性，并且在环境介质中不断被检出，因此近年来引起了人们的关注。本项目拟在已有工作基础上开展极地地区PBDEs及其衍生物、DP及其衍生物的赋存及随海洋食物链迁移放大研究。选择南极长城站、北极黄河站所在地区作为研究区域，通过对极地大气、土壤等非生物介质分析，研究卤代阻燃剂及其衍生物在极地的污染现状及介质分配规律，通过对极地海洋生态系统中处于不同营养级生物的分析，研究污染物在极地海洋食物链中的分布及随食物链迁移放大的规律，探讨影响其生物放大的主控因素。研究结果将揭示卤代阻燃剂及其衍生物在极地地区的污染现状及迁移转化规律，为评估这些污染物的来源及长距离迁移能力提供科学依据

The halogenated flame retardants of polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DP) has the characteristics and properties of persistent organic pollutants. The environment contamination problems caused by these pollutants has become research hotspot in environmental science area. Because the derivatives of PBDEs (OH-PBDE and MeO-PBDE) and DP present similar or even stronger toxicity than the retardant itself and they were more and more detected in various environmental matrices, they increasingly attracted much attention in recent years. Based on our previous work,this project intends to carry out systematic study on occurrence of PBDEs and its metabolites, DP and its derivatives in polar environmental matrices and their transport and bio-magnification through marine food chains. The Antarctic Great Wall Station and Arctic Yellow River Station area will be selected as the study area. By chemical analysis of the halogenated flame retardants and their derivatives in polar atmosphere, soil and other non-biological media, the current contamination levels, distribution and partition between different polar matrices will be investigated. Through chemical analysis of these contaminants in polar marine ecosystems at different trophic levels, the distribution and bio-magnification effect of these chemicals in polar marine food chains, and the main influencing factors will be investigated. The results will reveal the current contamination status, transport and transformation behavior of the halogenated flame retardants and their derivatives in polar regions, and provide scientific evidence to assess sources and long-range transport abilities of these contaminants.