Study on the application of the circulating well technology in the remediation of benzene pollution in groundwater

In this paper, a city organic pollution of groundwater remediation demonstration project was the main research content. The groundwater polluted by benzene was remediated by circulation wells in the polluted area in total construction of 4 wells cycle monitoring cycle and 9 monitoring wells. The application of the technology had been continued for 28 days. The results of this study showed that: with the continuous operation of the well cycle, the concentration of benzene in groundwater decreased; after 28 days operation, removal rate of benzene was 96.5%similar to 98.2%, the highest concentration detected benzene value decreased from 245.47mg/L to 4.39mg/L; after 28 days of treatment by groundwater circulation well, the concentration of benzene was higher than that of the "People's Republic of China sewage comprehensive discharge standard" (GB 8978-1996) the limit of 0.5mg/L three standards, the technology can deliver high concentrations of benzene decreased rapidly to low level, but the concentration is beyond the normal range of concentration, the groundwater also need further treatment.