State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
J Environ Sci (China). 2013 Jan 1;25(1):69-76. doi: 10.1016/s1001-0742(12)60010-2.
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 gamma-HBCD dominated in most of the sediment samples, followed by alpha- and beta-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.
研究了中国七大流域（长江、黄河、珠江、辽河、海河、塔里木河和额尔齐斯河）37 个复合表层沉积物中六溴环十二烷（HBCD）的浓度和地理分布。HBCD 的检出率为 54%，浓度范围为未检出到 206ng/g 干重。总体上，地理分布呈现从河流上游到下游、从华北到东南逐渐增加的趋势。与世界其他地区相比，长江流域沉积物中 HBCD 的平均浓度处于较高水平，而其他六个流域沉积物中的 HBCD 浓度处于较低或相似水平。长江三角洲沉积物中 HBCD 的浓度最高，珠江流域 HBCD 的检出率最高，表明工业和城市活动明显影响了 HBCD 的分布。HBCD 非对映异构体分布表明，γ-HBCD 是大多数沉积物样品中的主要异构体，其次是α-HBCD 和β-HBCD，这与商业 HBCD 混合物中的情况一致。进一步的风险评估反映了珠江、海河、塔里木河、黄河和长江沉积物中 HBCD 的平均蓄积量分别为 18.3、5.87、3.92、2.50 和 1.77ng/cm2。
