[Study on the groundwater petroleum contaminant remediation by air sparging].
The groundwater petroleum contaminant remediation effect by air sparging was investigated in an oil field. The results show that the soil geological situation has great influence on the air distribution, and the shape of air distribution is not symmetrical to the air sparging (AS) well as axis. The influence distance in the left of AS well is 6 m, and only 4 m in the right. The petroleum removal rate can reach 70% in the zone with higher air saturation, but only 40% in the zone with lower air saturation, and the average petroleum removal rate reaches 60% in the influence zone for 40 days continuous air sparging. The petroleum components in groundwater were analyzed by GC/MS (gas chromatogram-mass spectrograph) before and after experiments, respectively. The results show that the petroleum removal rate has relationship with the components and their properties. The petroleum components with higher volatility are easily removed by volatilization, but those with lower volatility are difficult to remove, so a tailing effect of lingering residual contaminant exists when the air sparging technology is adopted to treat groundwater contaminated by petroleum products.
Wang
Zhi-Qiang
ZQ
School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300132, China. wzq.fy@163.com
Wu
Qiang
Q
Zou
Zu-Guang
ZG
Chen
Hong
H
Yang
Xun-Chang
XC
Zhao
Ji-Chu
JC
D000388:Air; D010578:Petroleum; D014835:Volatilization; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D014877:Water Pollution, Chemical / Q000032:analysis / Q000517:prevention & control*
D010578:Petroleum; D014874:Water Pollutants, Chemical