石油类污染地下水土环境的曝气修复实验研究  

A Bench-scale Study on Diesel Oil Removal from Saturated Soil and Groundwater Using Air Sparging

作　　者：范伟[1] 杨悦锁[1,2] 曹玉清[1] 雷玉德[1] 李树[1] 

机构地区：[1]吉林大学环境与资源学院,长春130026 [2]卡迪夫大学地球科学学院

出　　处：《节水灌溉》2010年第5期5-8,共4页Water Saving Irrigation

基　　金：国家科技部"863"计划课题(2007AA06Z343);教育部长江学者奖励计划;吉林大学基本科研业务费"创新团队"项目(20082004)

摘　　要：曝气修复是一种去除水土环境中挥发性污染物的高效技术,具有良好的工程应用前景,但其机理有关的工作仍有进一步研究的空间。以石油类污染的饱和地下水土环境为研究对象,选取柴油作为代表性污染物,建立一维土柱模拟装置,开展地下水曝气修复技术的实验研究。通过5个土柱曝气系统的运行与监测,分析不同土壤介质、曝气流量条件对曝气过程及污染物去除效率的影响。结果显示:利用曝气修复技术可有效去除挥发性污染物,且增加曝气流量有利于提高污染物去除效率,高渗透率介质中污染物去除效率要高于低渗透率介质。此结论可为曝气修复技术的其他研究工作提供依据。Air sparging is an innovative in-situ remediation technology,which has been widely used to reduce concentrations of volatile organic contaminants in groundwater and soil environment.However,engineering design of this technology is largely dependent on empirical knowledge and experience of the design engineers,which contributes to the current uncertainties regarding the mechanisms of contaminants removal.Thus,understanding and characterisation of the affect factors during in-situ remediation using air sparging should be further studied for more robust and effective remediation.Serials of one-dimension experiments for fate and transport of TPH in soil and groundwater were conducted using bench-scale air sparging systems in plexiglass columns in this study.Two major factors（particle size and air flow） that can impact air sparging were investigated from these experiments,which can improve the confidence and reduce uncertainty in field application of this technology.The bench-scale study indicated that： air sparging is an effective technology for removal of volatile contaminants.The increase of air flow can lead the improvement of diesel oil removal,and the higher the soil permeability is,the much better the removal efficiency will be.All of the conclusions can be guidances for other related studies.

关 键 词：污染 曝气修复 柴油 曝气流量 土壤介质 

分 类 号：P641.3[天文地球—地质矿产勘探]