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于2013年秋季利用大流量采样器采集了江苏省江阴市大气PM_(2.5)样品,使用气相色谱质谱连用仪(GCMS)检测了19种有机氯农药(OCPs),对其残留水平、空间分布及来源进行分析。结果显示,江阴市大气PM_(2.5)中19种OCPs的总质量浓度平均值为2.84 ng·m-3,主要成分为HCHs、DDTs、工业氯丹以及甲氧氯,分别占OCPs总量的48.2%、19.7%、12.3%和12.5%。与国内外其他地区比较,江阴市大气中有机氯农药污染水平属中等偏上。OCPs空间分布趋势表现为环境监测中心OCPs污染水平最高,而申港公园污染水平最低。来源分析表明,江阴市大气PM_(2.5)中DDTs和氯丹均来源于历史残留;HCHs既来源于工业HCHs的历史残留,同时又存在大量林丹的输入。
In the autumn of 2013, PM_ (2.5) samples were collected from a large flow sampler in Jiangyin City, Jiangsu Province. Nineteen organochlorine pesticides (OCPs) were detected by gas chromatography-mass spectrometry (GCMS), and their residual levels, Source for analysis. The results showed that the average concentration of 19 OCPs in PM 2.5 in Jiangyin City was 2.84 ng · m-3, the main components were HCHs, DDTs, industrial chlordane and methoxyl chloride, accounting for 48.2% of the total amount of OCPs %, 19.7%, 12.3% and 12.5%. Compared with other regions at home and abroad, the pollution level of organochlorine pesticides in the atmosphere of Jiangyin is moderately upper. The spatial distribution trend of OCPs showed that the environmental monitoring center had the highest pollution level of OCPs and the lowest pollution level of the park. The analysis of source shows that both DDTs and chlordane in PM 2.5 in Jiangyin City originate from the historical residues; HCHs both originate from the historical residues of industrial HCHs and at the same time, there is a large amount of lindane.