深圳市冬、夏两季大气中有机氯农药的研究

利用大流量主动采样器,选择深圳市13个有代表性采样点,于2009年12月~2010年1月和2010年6月,分2个采样时期对深圳市大气中有机氯农药(OCPs)进行监测.结果显示,深圳市冬、夏大气中,13个点位总有机氯农药浓度变化范围分别为742~3522 pg/m3(平均值1769pg/m3)和507~2197pg/m3(平均值1163pg/m3).冬季大气中有机氯农药主要是DDTs、林丹、七氯、氯丹、六氯苯,占有机氯农药总量的87%;夏季大气中有机氯农药主要为DDTs、氯丹、林丹,三者总量占有机氯农药的89%.研究表明,深圳市大气中存在“新”DDT的输入,认为工业DDT是其主要来源,而γ-HCH以及氯丹的高检出与林丹和用于杀灭白蚁的氯丹的继续使用有关.

Organochloride pesticides in the atmosphere of Shenzhen in winter and summer

Air samples of thirteen sampling sites in Shenzhen were collected by Hi-vol air sampler during December 2009~January 2010 and June 2010, and mass concentrations of 16 organochlorine pesticides (OCPs) were analyzed. The main OCPs pollutions were DDTs, lindane, heptachlor, chlordane, hexacholrobenzene in winter, which accounted for 87% in total OCPs, whereas in the summer, the DDTs, chlordane, lindane were the most abundant compounds in the atmosphere which accounted for 89%. The concentrations of OCPs in thirteen sampling sites spanned the range of 742~3522 pg/m3 and 507~2197 pg/m3, and the average concentrations were 1769 pg/m3, 1163 pg/m3 respectively. There was “new” DDT input in Shenzhen, and technical DDT was suggested to be the important DDT source. The observed high level of HCH and Chlordane could be related to the current use of lindane as well as chlordane for termite control.