Research Of Air Sparging Removing Trichloroethylene Polluted Groundwater

Trichloroethylene is a kind of widespread polluted chlorinated organic solvent pollutants, it can through various channels enter human body to damage. Air Sparging method (AS method) is a rapid and effective remove method of trichloroethylene in the groundwater. This paper, through the laboratory simulation studied AS methods and heating method to eliminate trichloroethylene, for further study inside trichloroethylene pollution of groundwater management has certain directive significance.For Thermal Treatment of trichloroethylene conducted a preliminary study, with the rise of temperature, the concentration of trichloroethylene solution removal rate also increased. The higher the temperature, the faster trichloroethylene solution removal rate, and after 210min the better removal efficiency, finally the removal rate can nearly reach 100%. Different concentrations of trichloroethylene solution remove trends are very close, finally removal efficiency is also very close, the bigger concentration the bigger removal rate, but with the rise of temperature this trend become less obvious. And perliminary studied possible outcomes after Thermal Treatment of trichloroethylene by infrared spectrometer.Studies the removal efficiency and influencing factors of air sparging method removing trichloroethylene, the aeration flow has certain effect for removal rate, but not the bigger the better, on the same concentrations,0.5L/min has the largest removal rate of the four kinds of aeration flow, in 0.5L/min 500mg/L trichloroethylene the removal rate reached 0.045mg·L-1·min-1, very clearly proves the 0.5L/min aeration rate is the best aeration flow. The same aeration flow, the higher the concentration of trichloroethylene solution the bigger removal rate is. In a medium, pulse aeration mechanism is better than continuous aeration system.The orthogonal test method was used to study the progression of oxygen, temperature and concentration the three factors, and simulation field cases in a laboratory experiments, the results show that the air sparging method processing contaminated sites is an effective and feasible, remarkable time-consuming short method.