MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of China.
Environ Sci Pollut Res Int. 2013 Apr;20(4):2033-45. doi: 10.1007/s11356-012-1460-5. Epub 2013 Jan 12.
The levels of organochlorine pesticides (OCPs) in the water, suspended solids, and sediments from Lake Chaohu during the high water level period were measured by a solid-phase extraction gas chromatograph-electron capture detector. The spatial distributions of the three phases and the water/suspended solids and sediment/water partition coefficients were analyzed. The results showed the following: (1) The mean contents of OCPs in the water, suspended solids, and sediments were 132.4 ± 432.1 ng/L, 188.1 ± 286.7 ng/g dry weight (dw), and 13.7 ± 9.8 ng/g dw, respectively. The dominant OCP components were isodrin (85.1%) for the water, DDTs (64.4%) for the suspended solids, and both isodrin (48.5%) and DDTs (31.8%) for the sediments. (2) β-HCH was the primary isomer of HCHs in the water and sediments, and the proportions were 61.7 and 41.3%; γ-HCH was the primary isomer in the suspended solids, accounting for 49.3%; p,p'-DDT was the dominant content of DDTs in the water and suspended solids, whereas p,p'-DDD was the main metabolite of DDTs in the sediments. (3) The concentrations of contaminants in the water from the western lake were greater than those from the eastern lake, but the concentrations in the suspended solids from the western lake were less than those from the eastern lake. (4) There was no significant correlation between the water-suspended solids partition coefficient Kd and the n-octanol-water partition coefficient Kow, and between the sediment-water organic-C weighted sorption coefficients Koc and Kow.
在高水位期，采用固相萃取-气相色谱-电子捕获检测法测定了巢湖水体、悬浮物和沉积物中有机氯农药（OCPs）的含量。分析了三相的空间分布及水/悬浮物和沉积物/水分配系数。结果表明：（1）水体、悬浮物和沉积物中 OCPs 的平均含量分别为 132.4 ± 432.1ng/L、188.1 ± 286.7ng/g 干重（dw）和 13.7 ± 9.8ng/g dw，优势 OCP 组分为水体中的异狄氏剂（85.1%）、悬浮物中的滴滴涕（DDTs）（64.4%）和沉积物中的异狄氏剂（48.5%）和滴滴涕（DDTs）（31.8%）。（2）水体和沉积物中 HCHs 的主要异构体为β-HCH，所占比例分别为 61.7%和 41.3%；悬浮物中主要异构体为γ-HCH，占 49.3%；水体和悬浮物中 DDTs 的主要成分是 p,p'-DDT，而沉积物中 DDTs 的主要代谢物是 p,p'-DDD。（3）西湖区水体污染物浓度大于东湖区，但西湖区悬浮物中污染物浓度小于东湖区。（4）水-悬浮物分配系数 Kd 与正辛醇-水分配系数 Kow 之间，以及沉积物-水有机碳加权吸附系数 Koc 与 Kow 之间均无显著相关性。
