Site Investigation and Remediation of Sulfate-Contaminated Groundwater Using Integrated Hydraulic Capture Techniques

Inorganic pollution is widespread in groundwater, and sulfate one of the important types, which has an impact on ecological environment human health. Elevated concentrations ion pollutants often come from sewage discharge chemical plants. This study takes a sulfate-contaminated site Dongying City, Shandong Province, China, as research object. Nine boreholes were arranged along ditches to collect analyze soil samples groundwater layers. The concentration change with depths determined; maximum was 10,330 mg L−1 depth no more than 8 m. A hydraulic barrier carried out cut off sources. Based comprehensive understanding hydrogeological conditions degree site, capture technique used control water pumping injection volume, so that scope plume gradually reduced. wells polluted area, at outer edge zone. According calculation single well inflow influence radius, 28 66 needed be site. treatment process divided into four stages according following steps: pumping, injection, stoppage collecting after level recovered, completion stage treatment. above repeated twice. Chemical precipitation employed last step. results remediation showed 54 percent decreased significantly less 100 L−1, rest between 200 process. Two serious selected long-term monitoring wells, two-year continuous ranged 110 220 indicating integrated techniques are effective reliable technique.