Occurrence and distribution of hexabromocyclododecane in sediments from seven major river drainage basins in China
详细信息 查看全文
- 作者：Honghua Li ; Hongtao Shang ; Pu Wang ; Yawei Wang ; Haidong Zhang ; Qinghua Zhang ; qhzhang@rcees.ac.cn ; Guibin Jiang
- 关键词：HBCD ; surface sediment ; Chinese river drainage basin ; distribution
- 刊名：Journal of Environmental Sciences
- 出版年：2013
- 出版时间：1 January, 2013
- 年：2013
- 卷：25
- 期：1
- 页码：69-76
- 全文大小：317 K
文摘
The concentrations and geographical distribution of hexabromocyclododecane (HBCD) were investigated in 37 composite surface sediments from seven major river drainage basins in China, including Yangtze River, Yellow River, Pearl River, Liaohe River, Haihe River, Tarim River and Ertix River. The detection frequency of HBCD was 54 % , with the concentrations ranged from below limit of detection (LOD) to 206 ng/g dry weight. In general, the geographical distribution showed increasing trends from the upper reaches to the lower reaches of the rivers and from North China to Southeast China. Compared to other regions in the world, the average concentration of HBCD in sediments from Yangtze River drainage basin was at relatively high level, whereas those from other six river drainage basins were at lower or similar level. The highest HBCD concentration in sediment from Yangtze River Delta and the highest detection frequency of HBCD in Pearl River drainage basins suggested that the industrial and urban activities could evidently affect the HBCD distribution. HBCD diastereoisomer profiles showed that ¦Ã-HBCD dominated in most of the sediment samples, followed by ¦Á-and ¦Â-HBCD, which was consistent with those in the commercial HBCD mixtures. Further risk assessment reflected that the average inventories of HBCD were 18.3, 5.87, 3.92, 2.50, 1.77 ng/cm2 in sediments from Pearl River, Haihe River, Tarim River, Yellow River and Yangtze River, respectively.