摘要
根据太湖梅梁湾有机氯农药（OCPs）污染情况,采用GC/ECD分析了梅梁湾沉积物,并对4种鱼及螺狮为代表的水生生物中有机氯农药的残留现状进行了风险评估.结果表明：沉积物（干重）中OCPs浓度范围在8.45-48.54 ng/g之间,生物样品（湿重）中的浓度范围在2.68-31.34 ng/g之间.人类食用OCPs污染的水产品的潜在健康风险评估显示,从非致癌风险角度滴滴涕（DDTs）、六氯苯（HCB）、氯丹（CHL）和七氯环氧的危险商RHQ均小于1;从致癌风险角度,除CHL外,DDTs、HCB、六六六（HCHs）、七氯环氧的危险比RHR均大于1,长期癌症风险不容忽视.根据淡水沉积物质量导则标准估算,太湖梅梁湾沉积物中OCPs残留对水生生态系统的影响较小.
To better understand the organochlorine pesticides（ OCPs） contamination in Meiliang Bay,Taihu Lake（ China）,levels of OCPs were measured in the sediment,and the four species of fishes and Bellamya quadrata（ Benson） using GC / ECD. The results show that the concentrations of OCPs were found to range from 8. 45 to 48. 54 ng / g DW（ dry weight） in sediments,and from 2. 68 to 31. 34 ng / g WW（ wet weight） in biota tissues. Potential human health risk assessment associated with the above organochlorine contaminants due to the consumption of contaminated aquatic products was conducted. The hazard quotients RHQof DDTs,hexachlorobenzene（ HCB）,chlordane（ CHL）and heptachlor epoxide were all below unity based on non-cancer endpoints,while the cancer hazard ratios RHRof DDTs,HCB,HCHs and heptachlor epoxide were significantly higher than 1 except CHL＇s. Therefore,the long-term cancer risk caused by DDTs,HCB,HCHs and heptachlor epoxide is of great concern. Based on relative freshw ater sediment quality guidelines,the contaminations lead to limited adverse effects on the local aquatic system.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第2期328-335,共8页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(41301546
51408119)
水体污染控制与治理科技重大专项资助项目(2012ZX07101-008)
香港研究资助局资助项目(City U
1445/05M)
关键词
有机氯农药
沉积物
水生生物
风险评估
organochlorine pesticides
sediment
biota
risk assessment
