地下水曝气技术(AS)的国内外研究进展  

Development of air sparging at home and abroad

作　　者：刘晓娜[1] 程莉蓉[1] 

机构地区：[1]北京师范大学水科学研究院,北京100875

出　　处：《中国安全生产科学技术》2011年第5期56-62,共7页Journal of Safety Science and Technology

摘　　要：地下水曝气法(Air Sparging,AS)凭借其高效、原位的优势已经成为治理土壤、地下水有机污染的重要技术,其修复机理是将加压空气注入到饱和含水层以下,有机污染物通过相间传质作用(溶解、挥发、解吸、生物降解等)转化为挥发性污染物,并随气流迁移至包气带,再由其他抽气装置收集到地表气体处理设备。本文总结了AS技术在理论模型、曝气性能影响因素(气体流型、曝气影响半径)等方面的研究现状,归纳了气体流型的发展过程以及测量曝气影响半径的常见方法。地下水曝气法在国外地下水、土壤有机污染修复中的应用越来越广泛,理论研究方面也比较成熟。文章比较了AS技术在国内外的研究和应用情况,认为目前该技术应朝着综合的方向发展,以提高污染物修复效率。Air sparging（AS）is an innovative groundwater remediation technology which has been firstly used in Germany in the middle 1980s to remove volatile organic compounds（VOC）.Because of its properties of in-situ,efficiency and economy,AS has becoming an important technology to remediate organic pollution.Air is injected into the saturated zone below or near a contaminant plume.As the air rises to the surface,dissolved-and nonaquous-phase organic chemicals volatilize into the air and are removed from the groundwater.Combined with SVE（Soil Vapor Extraction）,efficiency of AS will be much better.In this paper the development of AS in theoretical model,factors that effects air sparging efficiency,for example,flow pattern,radius of influence was summar ized.Also,a comparison between home and abroad of AS＇s study and application was corcucted.AS has become a mature technology which have developed for many years.It was widely studied not only at theory,but also at application.In China AS technology is just on start-up periods.And there is much large space to explore.There also exist some problems that should be looked into.Volatility and bioremediation control the pollutant remediation,and which functions more important in different phase of air sparging is a tough question.

关 键 词：地下水曝气 理论模型 流型 影响半径 应用 

分 类 号：X52[环境科学与工程—环境工程]