摘要
采用中流量TSP采样器在北京大学住宅小区和教学楼同步采集了室内和室外的大气颗粒物样本 ,分析了其中的HCHs和DDTs残留量 .结果表明 :室内外大气颗粒物中∑HCH的含量分别为 0 1 39ng·m- 3和 0 1 63ng·m- 3,∑DDT含量为 0 40 1ng·m- 3和 0 42 4ng·m- 3.室内外的浓度差别不大 .但由于室内空气颗粒物含量显著低于室外 ,其颗粒物中HCHs和DDTs的质量浓度显著高于室外 ,这可能与室内颗粒物的粒径较小有关 .考虑到室内外空气颗粒物中有机氯异构分布的相似性 ,居住区室内空气颗粒物中的HCHs和DDTs主要来自室外 .而实验室内空气在一定程度上受HCHs内部源污染 .
Airborne particles were collected from both indoor and ambient environments of residential and office buildings on Peking University campus in summer 2003.HCHs and DDTs were analyzed.The mean residuals in the samples from the indoor and the ambient environments were 0.139ng·m -3 and 0.163 ng·m -3 for ∑HCH and 0.401ng·m -3 and 0.424 ng·m -3 for DDT,respectively.There were no significant difference between the indoor and the ambient environments.However,the concentrations in ng·g -1 for both HCHs and DDTs in indoor air were much higher than those in the ambient environment due to relatively low level of TSP indoor.Similar profiles were found for HCH isomers both indoor and outdoor,suggesting a common origin.The indoor environment of the office building studied,where HCHs were often used in experiments,was contaminated by the chemicals.
出处
《环境化学》
CAS
CSCD
北大核心
2004年第5期562-567,共6页
Environmental Chemistry
基金
国家自然科学基金 ( 4 0 3 3 2 0 1 5
40 0 2 1 1 0 1 )
国家重点基础研究发展计划 ( 2 0 0 3CB41 5 0 0 4)资助
