J4 ›› 2010, Vol. 40 ›› Issue (1): 164-168.

• 地质工程与环境工程 • 上一篇    下一篇

空气扰动技术对地下水中氯苯污染晕的控制及去除效果

秦传玉|赵勇胜|郑苇|李雨松|孙猛   

  1. 吉林大学 环境与资源学院|长春 130026
  • 收稿日期:2009-06-09 出版日期:2010-01-26 发布日期:2010-01-26
  • 通讯作者: 赵勇胜(1961-),男,内蒙古达茂旗人,教授,主要从事水土环境污染控制与治理研究 E-mail:zhaoyongsheng@jlu.edu.cn
  • 作者简介:秦传玉(1981-)|男|吉林省吉林市人|博士研究生|主要从事水土环境污染控制与治理研究|E-mail:wonderful0817@yahoo.com.cn
  • 基金资助:

    国家“863”项目(2007AA06A410)

Pollution Plume Control and Removal Efficiency of Chlorobenzene in Groundwater by Air Sparging

QIN Chuan-yu, ZHAO Yong-sheng, ZHENG Wei, LI Yu-song, SUN Meng   

  1. College of Environment and Resources, Jilin University, Changchun 130026, China
  • Received:2009-06-09 Online:2010-01-26 Published:2010-01-26

摘要:

原位空气扰动技术(air sparging,AS)是去除饱和土壤和地下水中挥发性有机物的最有效方法之一。首先利用二维砂槽研究曝气量与空气饱和度、影响半径的关系。结果表明:提高曝气量可以增大地下水中的空气饱和度以及曝气影响半径,但二者的增幅与曝气量的增幅不成比例,随着曝气量的增加,二者增幅减缓。又利用砂槽研究了在水力梯度一定的情况下,不同曝气量对氯苯迁移和去除效果的影响。空气的注入降低了影响区域的渗透系数,减缓了地下水的流动,有效地控制了污染物的迁移。未曝气时,130 h以后,氯苯随地下水流迁移出砂箱的比例为19.7%,而曝气量为0.1、0.2 m3/h时,此比例仅为3.6%和0.9%;与此同时,AS对氯苯的去除率分别为68.2%和78.6%。这说明AS可以有效控制污染物的迁移和去除,曝气量较大时效果更为明显。

关键词: 空气扰动, 氯苯, 影响半径, 污染物迁移

Abstract:

Air sparging (AS) has been proven to be one of the most effective means of removing volatile organic compounds in saturated soils and groundwater. Firstly, the effect of air flow rates on air saturation and radius of influence (ROI) was investigated using a two-dimensional laboratory sand tank. The results show that improving air flow rate can increase higher air saturation and wider ROI. However, the increases of air flow rate and air saturation, ROI are disproportionate. With the increase of air flow rate, the increase amplitude of air saturation, ROI becomes slow. Then the effect of different air flow rates on chlorobenzene migration and removal in sand tank with a certain hydraulic gradient was also studied. The air injection into groundwater can reduce the hydraulic conductivity within the zone of influence, can slow down groundwater flow and contaminant migration. When no air flow injected, the proportion of chlorobenzene migrated out of the sand profile with the effluent groundwater is 19.7% after 130 hours. While the proportions were only 3.6% and 0.9% at air injection rates of 0.1, 0.2 m3/h respectively. Meanwhile, 68.2% and 78.6% of the initial chlorobenzene mass has been removed at the two air injection rates respectively. This result reveals that AS can effectively control and remove contaminant migration in groundwater. This effect will be more obvious when higher air flow rate is used.

Key words: air sparging;, chlorobenzene, radius of influence, contaminant migration

中图分类号: 

  • X523
[1] 邹东雷, 唐抒圆, 熊厚峰, 唐绍福, 李春华, 陈鹏. β-环糊精交联聚合物对氯苯的吸附特性[J]. J4, 2012, 42(4): 1166-1172.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!