六溴环十二烷（HBCD）具有持久性有机污染物特点，以其为代表的溴代阻燃剂在城市中已被大量生产和使用，目前缺少HBCD污染物在城市沉积物/土壤介质中环境行为方面的系统研究。本课题以上海地区一个中国典型城市中的主要河流沉积物、污水厂污泥及工业/商业区土壤环境介质为研究对象，分析沉积物/土壤环境介质中不同HBCD异构体赋存情况及其时空分布等污染特性，探讨其影响因素及其在城市沉积物、土壤环境中的迁移、转化等环境行为特性。加强污染源分析，并对其存在的潜在生态风险进行评价分析。另外将沉积物、土壤等环境介质中HBCD赋存特性有机联系起来，分析此类污染物不同异构体迁移转化的关键环节、关键过程及相关环境影响因素，阐明此类污染物在城市区域沉积物及土壤等环境介质中的关键环境行为特性。该研究对于指导此类污染物的控制及减排措施的建立具有重要意义，并可为毒理评价等提供有效的理论依据和技术支持。

Hexabromocyclododecane (HBCD) has the characteristics of persistent organic pollutants. As representative of brominated flame retardants, HBCD has been widely used with a large production volume in the city. At present, the systematic study on HBCD in the urban sediment/soil is insufficient for evaluating environmental behavior. The subject aims to study the environmental chemical behavior of HBCD, such as contamination characteristics and spatial and temporal distribution, in the major rivers sediments, sewage sludge and industrial/commercial soils of Shanghai, a typical Chinese city. The occurrence and contamination characteristics of different HBCD diastereomers are analyzed emphatically. The influence factors and migration, transformation, fate of HBCD in the urban sediment and soil are also discussed. Strengthen pollution source analysis, and preliminary evaluation of its potential ecological risk. In addition, depending on connection of contamination between the city's major rivers sediments and soils, it is needed for analysing the key links and key process of pollutants migration and transformation. Thus, occurrence status and environmental behavior of HBCD are elucidated in the urban sediment and soil. The study will be significant for controlling and reducing emission of the pollutant, and it also can provide a theoretical basis and technical support to evaluate the ecotoxicological effects.