摘要:
采用DFJ-l型五段分级采样装置,对呼和浩特市冬夏两季空气中不同粒径(分别为≥7.0μm,7.0-3.3μm,3.3-2.0μm.2.0-1.1μm,≤1.1μm)颗粒物上有机氯农药的残留量进行分析.测定结果表明:在空气颗粒物分级样品中,均检出有机氯农药(HCH-666和p,p'-DDE)残留量;空气颗粒物中HCH-666冬季均值为0.502ng·m-3,夏季为l.070ng·m-3,而p,p'-DDE在冬季为0.085ng·m-3,夏季为0.108ng·m-3;呼和浩特市空气中有机氯农药残留量夏季均高于冬季,不同粒径空气颗粒物中有机氯农药的分布规律为:冬季主要富集在细小颗粒(≤l.1μm)上.在30.6%—70.5%之间,在夏季有机氯农药的残留分散吸附在五十不同粒径级上
Abstract:
Organochlorine pesticide residues on different diameter airborne particle ( ≥7.0μm, 7.0-3.3μm, 3.3-2.0μm, 2.0-1.1μm, ≤1.1μm) were sampled and measured in the atmosphere of Huhehaote urban using DFJ-1 model five stage classification air samples in the winter and summer. The results were showed that residues of organochlorine pesticides (HCH and p, p'-DDE) were found on different diameter airborne particles. The mean concentration of HCH was 0.502 ng·m-3 in summer, and the p,p'-DDE was 0.085 ng·m-3 in winter and 0.108ng·m-3 in winter and 1.070ng·m-3 in summer. The leaves of residues were similar to that reported in foreign literature. Distribution of organochlorine pesticides on different diameter showed that there were about 30.6%-70.5% of the residues on small particles (≤ 1.1μm) in winter, but the residues were distributed on five stage classification air samples in summer respectively. Residues of organochlorine pesticides in summer were higher than that of one in winter. Finally, the health meaning of result was discussed combining with the literature.
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