莱州湾及其邻近海域表层海水中两种有机氯农药污染状况和生态风险评价

Pollution status and ecological risk assessment of two organic chlorinated pesticides in the surface seawater of Laizhou Bay and its adjacent waters

对莱州湾及其邻近海域表层海水中氯丹、硫丹及硫丹硫酸盐含量进行调查研究,为该海域海水质量状况及生态风险评价提供科学数据。2012年8月、9月,在调查海域设置51个站位,取其表层海水,用气相色谱法对氯丹、硫丹及硫丹硫酸盐含量进行检测。8月氯丹、硫丹及硫丹硫酸盐浓度范围依次为N.D.（Notdetected）~0.58ng/L、N.D.~0.85ng/L、N.D.~2.18ng/L,9月依次为N.D.~0.84ng/L、N.D.~2.13ng/L、N.D.~1.94ng/L。两种有机氯农药受陆源性输入影响,呈现出由近岸向远海递减的趋势;研究海域整体污染程度处于一个可接受的水平,但海域中有新的硫丹污染物输入和积累,需要引起一定重视。

Chlordane, endosulfan and endosulfan sulfate in the surface seawater of Laizhou Bay and its adjacent sea area were analyzed in order to provide a scientific data for the appraisal of ecological risk and the quality of seawater. In August and September of 2012, 51 stations were set up evenly in the study sea area. The surface seawater collected from these stations was analyzed by GC-ECD. Concentrations of chlordane, endosulfan and endosulfan sulfate were N.D.（Not detected）~0.58ng/L, N.D.~0.85ng/L, N.D.~2.18ng/L in August and N.D.~0.84ng/L, N.D.~2.13ng/L, N.D.~1.94 ng/L in September respectively. Distribution of two organic chlorinated pesticides was affected by the inputs of terrestrial pollution, and their concentrations showed a decreasing trend from the inshore to offshore waters. Pollution of the two organic chlorinated pesticides was at an acceptable level. But the new inputs and accumulation of endosulfan should be concerned.