摘要
在夏、冬季采集杭州西湖19个点位表层水体,采用气相色谱(GC-ECD)内标法对18种有机氯农药的含量进行了分析测定。结果表明,夏、冬季杭州西湖表层水体中OCPs总含量范围分别为24.86～159.80 ng.L-1和20.88～96.24 ng.L-1,平均值分别为75.09和43.60 ng.L-1。OCPs的含量随季节变化,夏季水体中OCPs的含量高于冬季的含量。杭州西湖表层水体中OCPs的含量次序为:∑DDTs>∑HCHs>∑其他OCPs,且水体中DDTs和HCHs污染主要来源于环境中早期残留。夏、冬季杭州西湖表层水体中有机氯农药污染与其他地区相比,污染情况相对较低,各点位表层水体中HCHs和DDTs含量均未超过地表水环境质量标准。
The 19 surface water samples were collected from the West Lake of Hangzhou in summer and winter. The concentrations of 18 organochlorine pesticides（OCPs） in the samples were determined by GC-ECD with the internal standard method. The results showed that the total concentrations of OCPs in surface water from the West Lake of Hang-hou in both summer and winter were in the ranges of 24. 86 - 159.80 ng·L^-1 （ with a mean of 75.09 ng·L^-1 ） and 20. 88 -96. 24 ng·L^-1 （with a mean of 43.60 ng·L^-1 ）. The concentration of OCPs was seasonal and the level of OCPs in summer was higher than that in winter. The orders as the total concentrations of OCPs in surface water from the West Lake of Hangzhou were ： DDTs 〉 HCHs 〉 other OCPs, and DDTs and HCHs were mainly the early res- idues in environment. Compared with other regions, the concentration of OCPs in surface water from the West Lake of Hangzhou was lower. The concentration of DDTs and HCHs in surface waters did not exceed the limit of surface water environment quality of China.
出处
《浙江农业学报》
CSCD
北大核心
2013年第1期124-129,共6页
Acta Agriculturae Zhejiangensis
基金
国家自然科学基金项目(20807038)
关键词
有机氯农药
杭州西湖
表层水体
时空分布特征
organochlorine pesticides
spatial and temporal distribution
surface water
West Lake of Hangzhou
