Study on ISCO technology for groundwater contaminated by petroleum organic pollutants
In order to investigate the remediation effect of in-situ chemical oxidation remediation technology on petroleum organic contaminated groundwater,diesel and benzene were prepared to simulate contaminated groundwater. Petroleum and benzene were chosen as the target contaminants,and the comparison of different oxidants,dosage of additives,combination ratio of reagents,and Synergistic chemical oxidation of petroleum organic compounds by surfactants for the removal of petroleum and benzene from groundwater,Petroleum is evaluated according to the Class IV water quality standard of the Surface Water Environmental Quality Standard GB3838-2002,while benzene is evaluated according to the Class IV water quality standard of the Groundwater Quality Standard GBT14848-2017. The results show that the removal efficiency of petroleum and benzene in ISCO reagents is HP>SPC>PS>CP. HP and SPC are unsafe in underground environments due to their release of gases,so PS and CP are chosen. The combination of PS and CP improves the removal rates of petroleum and benzene compared to both PS and CP alone. When PS/CP/Fe2+/CA/TPH is 60/40/50/100/1,the removal rate of petroleum is the highest at 65. 4％,and the removal rate of benzene is the highest at 100％ . The synergistic effect of rhamnolipid and ISCO can not only improve the removal of petroleum,but also improve the removal of benzene. When the addition amount of rhamnolipid is 0. 01％,the highest removal rate of petroleum is 86. 3％,and the removal rate of benzene is 99. 6％,and the concentration of petroleum in polluted groundwater is 0. 48 mg/L,which is lower than the limit value of the IV standard in the Surface Water Environmental Quality Standard( GB3838-2002)by 0. 5 mg/L,and the concentration of benzene is 0. 007mg/L,Below the IV standard limit of 0. 12 mg/L in the" Quality Standard for Groundwater"( GB/T14848-2017). It can be seen that the synergistic effect of rhamnolipid and ISCO on the remediation of petroleum organic contaminated groundwater is feasible.
petroleumbenzenein situ chemical oxidationrhamnolipids cooperate with ISCO
万方数据
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