南宁市大气颗粒物中OCls的分布及源解析

发布时间：2017-12-26 22:31

本文关键词：南宁市大气颗粒物中OCls的分布及源解析　出处：《环境科学与技术》2016年12期 　论文类型：期刊论文

【摘要】：为了研究有机污染物的区域分布、来源与大气传输,利用主动式大气采样器对南宁市春季8个监测点位大气颗粒物样品采集,采用加速溶剂萃取和气相色谱-三重四级杆串联质谱对样品中17种有机氯农药(OCPs)和11种氯苯类化合物(CBs)的含量状况进行了分析测定。检测结果表明,大气颗粒物中OCPs和CBs浓度分别为nd~34.7 pg/m~3和518~1 315 pg/m~3,以滴滴涕类化合物(DDTs)、二氯苯和三氯苯污染为主。DDTs同分异构体分布表明南宁市北面大气颗粒物中DDTs可能来自同一个源,而东、南、西面的DDTs则来自不同的源。南宁市大气颗粒物中DDTs主要来自附近地表土壤历史残留,并非远距离传输,也没有新三氯杀螨醇输入环境或三氯杀螨醇输入不是主要来源。二氯苯、三氯苯、四氯苯不同物质之间呈现同步迁移的规律,五氯苯和六氯苯也呈现同步迁移的规律。
[Abstract]:In order to regional distribution, source and atmospheric transport of organic pollutants of Nanning city in spring of 8 monitoring sites of atmospheric particulate samples were collected using active air sampler, using accelerated solvent extraction and gas chromatography tandem mass spectrometer three four level of 17 kinds of organochlorine pesticides in the sample (OCPs) and 11 chlorinatedbenzene compound (CBs) were analyzed to determine the content of the situation. The results showed that the concentrations of OCPs and CBs in atmospheric particulates were nd~34.7 pg/m~3 and 518~1 315 pg/m~3, respectively, mainly in DDT compounds (DDTs), two chlorobenzene and three chlorobenzene. The distribution of DDTs isomers indicates that DDTs in the atmospheric particulates in the north of Nanning may come from the same source, while the DDTs in the East, South and West comes from different sources. The DDTs of atmospheric particulates in Nanning is mainly from the surface soil history. It is not long-distance transmission, nor does new three chloroacarb input environment or three chloroacarb input is not the main source. Two chlorobenzene, three chlorobenzene, and four chlorobenzene different substances showed the law of synchronous migration, and five chlorobenzene and six chlorobenzene also showed the law of synchronous migration.
【作者单位】：广西壮族自治区环境监测中心站;
【基金】：广西科技基础条件平台建设项目(10-108-27H) 广西科学研究与技术开发计划项目(2014AA03048)
【分类号】：X513
【正文快照】： 有机氯农药(organochlorine pesticides,OCPs)是一种半挥发性持久性有机污染物(persistent organicpollutants,POPs),其具有高毒性、持久性、生物积累性和长距离的迁移性[1-2]。氯苯类化合物(chlorobenzenes,CBs)作为对人类和环境有严重危害的有机污染物在自然界和人体组织中

【相似文献】