青岛大气中有机氯农药(OCPs)的初步研究  

Preliminary study on organochlorine pesticides (OCPs) in the atmosphere of Qingdao,China

作　　者：成海容[1] 林田[2] 王祖武[1] 

机构地区：[1]武汉大学资源与环境科学学院环境工程系,湖北武汉430079 [2]中国科学院地球化学研究所,贵州贵阳550002

出　　处：《地球化学》2012年第6期569-575,共7页Geochimica

基　　金：国家自然科学基金(41103061);中国科学院广州地球化学研究所有机地球化学国家重点实验室开放基金(OGL-201110)

摘　　要：2005年4月至2006年3月,利用大流量采样器采集青岛大气中气相和颗粒相样品,并分析气相和颗粒相中的有机氯农药(OCPs)。结果表明,青岛大气中α-HCH、γ-HCH、HCB、o,p′-DDT、p,p′-DDT和p,p′-DDE的浓度平均值分别为(78±41)pg/m3、(289±236)pg/m3、(221±186)pg/m3、(81±62)pg/m3、(54±49)pg/m3和(60±44)pg/m3,远低于广州、天津等城市。大气中的有机氯农药浓度在一定程度上受温度影响,但相关系数并不高(R2<0.4),斜率较缓,表明大气的长距离迁移对其浓度也有一定的影响。用后向气流轨迹法对气团来源追踪,发现当青岛受到东亚沙尘暴的影响时,有机氯农药的浓度升高,而当有来自黄海较干净的气团到达青岛时,大气中有机氯农药的浓度明显偏低。Air samples were collected consecutively by a modified Anderson-type Hi-Volume air sampler at two-day intervals from April 19 to May 21, 2005, and then every week from May 30, 2005 to March, 2006, to determine the seasonal variations and potential sources of organochlorine pesticides （OCPs） in the atmosphere of Qingdao. The results indicated that the average concentrations of α-HCH, γ-HCH, HCB, o,p＇-DDT, p,p＇-DDT and p,p＇-DDE in Qingdao air were （78±41） pg/m3, （289±236） pg/m3, （221±186） pg/m3, （81±62） pg/m3, （54±49） pg/m3 and （60±44） pg/m3, respectively, which were much lower than those observed in Tianjing and Guangzhou. Rela- tively low slope and temperature dependence （R2〈0.4） suggested that variations in the air concentrations of ~CPs in Qingdao just could be partly explained by temperature difference. Five-day back trajectory analysis indicated that unusually high air concentrations of OCPs were related to the Asian dust episodes, while relatively low con- centrations of OCPs were observed when the clean air mass from the yellow sea occurred in Qingdao.

关 键 词：有机氯农药 温度 后向气流轨迹 青岛 

分 类 号：P593[天文地球—地球化学] X51[天文地球—地质学]