摘要
用GC／ECD法测定了小海地区上下层沉积物中17种有机氯农药的浓度水平和分布特征。结果表明：小海湾上层OCPs含量明显高于下层，且大致呈现由内湾至人海口先增后减的分布特征，入海口处含量的突增可能与泻湖的特殊地理构造有关；DDTs类有机氯农药在内湾的降解程度明显强于人海口地区，α-HCH／γ-HCH比值均处于0～4之间，认为沉积物中HCHs来源于林丹和工业HCH；DDTs含量水平低于厦门湾海域、澳门河口等经济发达地区，高于泉州湾、莱州湾等半敞口型海湾；HCHs含量远低于厦门湾、泉州湾及莱州湾。
Concentrations of organochlorine pesticides （OCPs） residues in Quanzhou Bay, China, are determined by GC/ECD. The results show that concentrations of total OCPs in the upper surface sediment is obviously higher than those in the lower sediment. It also presents that concentrations of OCPs increase in the inner bay and then decrease near the exit. The sharp high concentration in the exit may be attributed to its special terrain. The result shows that the concentration of DDTs moves up first, and then goes down from the inner bay to the outside, and the sharp ascending concentration is probably relevant to the special terrain of the lagoon. The degree of DDTs degradation in the inner bay is obvious higher than that near the exit. The ratio of α-HCH/γ-HCH is between 0 and 4, and the source of HCHs is industrial HCH. The concentration of DDTs in Xiaohai is lower than that in developed areas, such as Xiamen Bay, and higher than that in half-opened bay, such as Quanzhou Bay and Xinghua Bay. The concentration of HCHs is much lower than that in Xiamen Bay, Quanzhou Bay and Xinghua Bay.
出处
《安全与环境工程》
CAS
2007年第2期9-12,共4页
Safety and Environmental Engineering
