Application of permeable reaction barrier coupled pumping-recharge hydraulic control technology upon groundwater remediation in petrochemical contaminated sites
Permeable reaction barrier(PRB)coupled pumping-recharge hydraulic control technology is selected to remediate the polluted groundwater.MODFLOW and MT3DMS modules of GMS software are employed to establish the groundwater flow model and solute transport model of pollutants in a hypothetical contaminated site,while different scenarios are set according to the key influencing factors for the remediation effect of this technology,including groundwater hydrodynamic conditions,hydrogeological conditions and pollutant removal characteristics of remediation materials.Based on comparisons of various scenarios'simulation results and data analysis,the quantitative relationship expressions among pollutant removal rate r,pumping-recharge quantity Q,aquifer hydraulic conductivity K and pollutant removal efficiency η are derived,which can be used to guide the key parameter setting of the technology when applying to actual contaminated site.Taking an actual petrochemical contaminated site in Shandong province,China as an example,simulation results indicate that after 2 years of remediation,the removal rates of pollutants by the coupling remediation technology and the single PRB remediation technology are 75.2%-80.1%and 12.9%-14.7%,respectively,demonstrating that the remediation performance of the coupling remediation technology is much better than that of single PRB remediation technology in the contaminated site with poor permeability and small hydraulic gradient.
petrochemical contaminated sitesremediation of contaminated groundwaterPRB coupled pumping and recharge hydraulic control technologyremediation effectinfluencing factor
万方数据
维普
