溴代阻燃剂在水环境界面(水/悬浮颗粒物/沉积物)的迁移转化机理研究

项目名称： 溴代阻燃剂在水环境界面(水/悬浮颗粒物/沉积物)的迁移转化机理研究

项目编号： No.40803026

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 无线电电子学、电信技术

项目作者： 邓红梅

作者单位： 广州大学

项目金额： 20万元

中文摘要： 该项目以高污染的东江石龙河段水域为研究靶区，针对溴代阻燃剂在水体界面水/颗粒物/沉积物中的分布、迁移转化及其微观调控机理进行研究。研究结果表明，东江溶解相和颗粒相中∑4PBDEs 的含量为0.92-2.69 ng/L, BDE47, 99，153和209是其主要的组分;溶解相中的PBDEs在洪水期的含量比在枯水期的含量高；PBDEs主要来源于地表径流输入。PBDEs在东江水体中的分布与分配主要受控于溶解有机碳和悬浮颗粒物。PBDEs（10-98% ）主要吸附在水体胶体态。东江石龙段中水体中PCBs的含量范围为未检出-1.56ng/L，在颗粒物中的含量范围4.42-211.85 ng/g；从PCBs的组分分布来看，以PCB33、PCB52、PCB41、PCB128、PCB170占优势。BDE47, BDE99，BDE209和14种PBDEs的年输出通量分别为10.2，10.3，3.9，238.7和339kg；PCB33，PCB52，PCB41，PCB128和PCBs的年输出通量分别为5.4，18.7，7.1，51.9和502.5kg。研究中还对多环芳烃和雌激素进行了类似研究验证。

中文关键词： 多溴联苯醚；多氯联苯；东江；水柱；分布

英文摘要： The objective was to address the distribution among the interfaces (water/ suspended particle matter/ sediment), transformation and micro-regulation mechanisms of brominated flame retardants in the heavily polluted Shilong Section of Dongjiang River watershed, South China. It showed that the concentrations of ∑4PBDEs in Dongjiang River were 0.92-2.69 ng/L. BDE47, 99, 153 and 209 were the most abundant congeners in all samples. Water samples collected in flood season contained higher PBDE concentrations than those in dry season. The main source of PBDEs was due to the rain off input. Dissolved organic carbon (DOC) and suspended particle matter (SPM) played important role in determining the distribution and partitioning of PBDEs between particle and dissolved phases. Sorption onto colloids (10-98% for PBDEs) was responsible for this phenomenon. The concentrations of PCBs were in the range of non-detectable-1.56 ng/L in dissolved phase, and 4.42-211.85 ng/g, respectively. PCB33, PCB52, PCB41, PCB128 and PCB170 were the most abundant congeners in all samples. The annual fluxes of BDE47, BDE99，BDE209 and ∑4PBDEs were 10.2，0.3，3.9，238.7 and 339 kg, respectively. The annual fluxes of PCB33，PCB52，PCB41，PCB128 and PCBs were 5.4，18.7，7.1，51.9 and 502.5 kg, respectively. Similar results were obtained for polyaromatic hydrocarbons and endocrine disrupters.

英文关键词： Polybrominated diphenyl ethers (PBDEs); Polychlorinated biphenyls (PCBs); Dongjiang River; Water column; Distribution