%0 Journal Article %T 白洋淀表层沉积物中有机氯农药和全多氯联苯的分布特征及风险评估 %T Distribution and risk assessment of organochlorine pesticides and polychlorinated biphenyls in surficial sediments from Lake Baiyangdian %A 许妍 %A 陈佳枫 %A 徐磊 %A 刘雨薇 %A 谢立莹 %A 王之卓 %A 金苗 %A 陈宇炜 %A XU,Yan %A CHEN,Jiafeng %A XU,Lei %A LIU,Yuwei %A XIE,Liying %A WANG,Zhizhuo %A JIN,Miao %A CHEN,Yuwei %J 湖泊科学 %J Journal of Lake Sciences %@ 1003-5427 %V 32 %N 3 %D 2020 %P 654-664 %K 白洋淀;沉积物;多氯联苯;有机氯农药;风险评估 %K Lake Baiyangdian;sediments;polychlorinated biphenyls;organochlorine pesticides;risk assessment %X 为了解白洋淀表层沉积物中有机氯农药(OCPs)和多氯联苯(PCBs)的污染情况,采用改进的GC-μECD方法对白洋淀11处沉积物进行了20种OCPs和全部209种PCB单体的定量检测和分析.结果显示:白洋淀11个沉积物样品共检出10种OCPs和24种PCBs,∑OCPs和∑PCBs的含量范围分别为1.22~52.45 ng/g(DW)和nd ~37.61 ng/g,在国内处于中等水平;OCPs组成中以HCHs和Dieldrin(狄氏剂)为主,分别占到∑OCPs的39.9%和31.5%,其中7个采样点的HCHs以林丹输入为主,4个采样点以工业六六六污染为主.DDTs检出率较低,来源主要为历史残留;检出的PCB单体以低氯联苯为主,其中一氯、二氯和三氯联苯占∑PCBs的64.73%;采用沉积物质量标准法进行生态风险评估,结果表明白洋淀地区沉积物中p,p'-DDD和∑PCBs生态风险较低,Dieldrin生态风险尚需关注,γ-HCH生态风险较高,不容忽视. %X To better understand the contamination of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in sediments from Lake Baiyangdian, 20 OCPs and all 209 PCB congeners were measured in 11 surficial sediment samples collected from different locations of Lake Baiyangdian. Moreover, the risks posed by OCPs and PCBs were assessed based on sediment quality guidelines. The results show that 10 OCPs and 24 PCB congeners were detectable. The total OCPs concentrations ranged from 1.22 to 52.45 ng/g(DW) (dry weight), while the total PCBs levels were from below detection limit to 37.61 ng/g. These results indicate a moderate pollution level within China. HCHs and Dieldrin were predominant in all OCPs, which accounted for 39.9% and 31.5% of total OCPs, respectively. Seven sampling sites of Lake Baiyangdian were contaminated by Lindane (γ-HCH) and the other 4 sampling sites were mainly contaminated by industrial HCHs. Moreover, new HCHs inputs might exist in some locations. DDTs levels were relatively low, which suggests that DDTs in Lake Baiyangdian might be the historical residues. PCBs detected in these sediment samples were dominated by low chlorinated PCBs congeners. Mono-, di-and tri-chlorinated biphenyls accounted for 64.73% of the total PCBs. However, it is noted that some new organochlorine pesticide pollution of HCHs may be present in some areas. Ecological risk assessment based on sediment quality guidelines revealed that the risks posed by p,p'-DDD and ∑PCBs were relatively lower, while the risk associated with Dieldrin was of concern. Notably, γ-HCH posed apparent adverse effects on the local ecological system. %R 10.18307/2020.0306 %U http://www.jlakes.org/ch/reader/view_abstract.aspx %1 JIS Version 3.0.0