A PRB Remediation Test of Cr-polluted Groundwater

With Cr-polluted groundwater as the research subject, permeation reaction barriers (PRB) were designed with active carbon, Fe0, and active carbon plus Fe0 as reaction media respectively, with which the feasibility and effectiveness of the treatment of Cr-polluted groundwater by PRB were tested and studied. The results of the test show that active carbon has a certain adsorptive effect on Cr(VI) and Fe0 has a stronger reductive effect on Cr(VI); when Fe0 and active carbon act in combination, the proportioning of the two affects the removal rate ofCr(VI), i.e., the larger the mass fraction of Fe0 is, the better the removal effect will be. When the mass fractions of Fe0, active carbon and quartz sand are 40%, 4% and 2% respectively, the mass concentration of Cr(VI) can be reduced from 100 mg/L to 0.05 mg/L or below, which meets the requirement of water quality standard for fing drinking water. The result of the test shows that the use of the PRB technology in the treatment of Cr(VI)-polluted groundwater is feasible.