Some Features Remediation of Organic Polluted Groundwater Sites Via In-Situ Heating Enhanced and Circulation Well
摘要
By setting up in-situ heating wells within the radius of influence of groundwater circulation wells, the effectiveness of using circulation wells and heating enhanced circulation wells to remediate organic contaminated groundwater was compared and studied. The results showed that in the fine sand aquifer medium of the site, when the length of the groundwater circulation well was set to 6.00m and the aeration flow rate was 0.3 m3/h, the influence radius was 5 m. After 48 hours of cumulative remediation, the total petroleum hydrocarbons in the circulation well reached the remediation target value; When the temperature of the four in-situ heating wells located 1 m away from the enhanced circulation well is set to 40°C, the total concentration of petroleum hydrocarbons in the circulation well reaches the target value after 24 hours of cumulative repair; After 48 hours of repair, the repair efficiency of the reinforced circulation well increased by 3.18% compared to the circulation well, and the repair efficiency of the working well 5 m away from the reinforced circulation well increased by 22.97% compared to the working well 5 m away from the circulation well; The influence radius of both the circulation well and the enhanced circulation well is about 5 m. In situ heating has improved the efficiency of remediation and provided a new approach for the application of groundwater circulation wells in the remediation of contaminated sites.