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污染场地土壤气中挥发性有机物定量被动采样技术研究及应用
姜 林,赵 莹,钟茂生,夏天翔,付全凯,等
作者单位E-mail
姜 林 北京市环境保护科学研究院 jianglin@cee.cn 
赵 莹 北京市环境保护科学研究院 237768179@qq.com 
钟茂生 北京市环境保护科学研究院  
夏天翔 北京市环境保护科学研究院  
付全凯 北京市环境保护科学研究院  
摘要:
随着我国城市化进程的加快,城区内置换出越来越多的含挥发性有机物的污染场地。污染场地中地下水以及土壤中挥发性有机物(土壤气)向上挥发扩散是造成污染的重要途径,因此土壤气的调查的重要性日益凸显。土壤气的主动采样由于操作繁琐、成本高、易受多种因素影响、不能采集长时间的浓度,日益暴露了该方法的缺陷。而基于分子扩散原理设计的被动采样方法简便、成本低、适用于大面积采样、能采集时间加权的浓度,因此得到越来越多的关注。本文针对土壤气被动采样技术的原理、吸附剂的选择和结构的优化、吸收速率的研究、场地应用、国外技术导则等问题进行了系统介绍,并结合我国国情进行了研究展望,以期为我国土壤气采样技术导则的编制和规范国内土壤气的采样技术提供理论支持。
关键词:  污染场地  土壤气  挥发性有机物  被动采样
DOI:
分类号:X703.1
基金项目:环保公益项目(201509034)北京市自然科学基金(8164055)
Passive Sampling Technology Research and Application on Volatile Organic Compounds of Soil Gas in Contaminated Sites
JIANG Lin,YING Zhao,ZHONG Mao-sheng,XIA Tian-xiang,FU Quan-kai,et al
Abstract:
With the speeding up of urbanization in our country, more and more contaminated sites containing volatile organic compounds arise. Volatile organic compounds in the groundwater or soil volatile at contaminated sites (soil gas) volatilizing upward is one of the important transport paths, so the importance of the investigation of soil gas grow up. Because of the complicated operation, high cost, easy to be affected by various factors, unable to collect the concentration of the long time with regard to active sampling of soil gas, the defect of the method increasingly exposed. At the same time, passive sampling method which is based on the principle of molecular diffusion is simple, low cost, suitable for large area sampling, able to collect the time-weighted average concentrations, so it gets more and more attentions. This paper introduces the theory of passive soil gas sampling technology, the choice of sorbent, structure optimization, the uptake rate of samplers, field application and some technical guidelines in foreign, and makes the prospect of the research combining with China"s national conditions in order to provide theoretical support for compiling Chinese guideline of soil gas sampling technology and standardizing domestic soil gas sampling technology.
Key words:  Contaminated sites  soil gas  volatile organic compounds  passive sampling