【摘要】 <正> 人工合成的有机氯农药BHC、DDT主要通过大气传输、河口径流和沿岸排水进入海洋。由于海洋生物对它们有较强的富集能力,所以输入到海洋的有机氯农药不但污染海洋环境,而且会通过食物链的传输反馈给人类,危害人类健康。因此,BHC和DDT含量已成为评价环境污染的重要指标。测定表层沉积物中BHC和DDT的含量还可以估计上复水层农药的污染现状,预测生物和非生物因素对污染物分布的影响。本文据1982年9月的调查资料,首次报道了厦门港湾表层沉积物BHC和DDT的含量及其分布特征;初步讨论了岸畔农药使用、水动力、地质地貌和滩涂养殖等因素对BHC、DDT含量分布的影响。更多还原

【Abstract】 BHC and DDT concentrations and their distribution in the upper sediment layer of the Xiamen Harbour are reported for the first time.The effects of agricultural activities, hydrodynamics, topography and sea-farming are discussed. The result shows that the BHC and DDT concentrations range from 1,5 to 27 (μg·BHC/kg)and from 4.7 to 150 (μg·DDT/kg) with medians of 11 and 24.The ratio of DDT/BHC ranges from 1 to 25 with a median of 2.5. It appears that lower concentration area is associated with weaker sedimentation and stronger current. Higher concentration of BHC is found near the agricultural area, and of DDT, in the sea-farming area.更多还原