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- W2969715999 endingPage "121042" @default.
- W2969715999 startingPage "121042" @default.
- W2969715999 abstract "Electrokinetic in situ chemical oxidation (EK-ISCO) could be used to remediate inorganic/organic-contaminated soil. Oxidizing agents were effectively delivered to the contaminated zones through electromigration and the electroosmosis. However, the cathode may react with oxidants, which would reduce the oxidative effect and lead to low contaminant removal rates. In this study, ion-exchange membranes (IEMs) enhanced EK-ISCO was used to remediate polycyclic aromatic hydrocarbons (PAHs) in contaminated soil. IEMs were installed between the electrode compartment and the soil compartment. The results showed that the IEMs could effectively control pH and the oxidation-reduction potential (ORP) changes in the soil column. Placing a cation-exchange membrane (CEM) at the cathode prevented the S2O82− from contacting the cathode and reduced the oxidative loss effect, which meant that PAH removal efficiency significantly improved (from 33.1% to 87.1%). Furthermore, there were minimal changes to the soil properties. Maintaining the soil at a low pH also improved the PAH removal efficiency (93.1%), but the physicochemical properties of the soil significantly changed and a large amount of power was consumed (2015 kWh t−1). This study indicated that placing a CEM at the cathode improved remediation efficiency, and reduced power consumption and the adverse effects on soil properties during EK-ISCO." @default.
- W2969715999 created "2019-08-29" @default.
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- W2969715999 date "2020-01-01" @default.
- W2969715999 modified "2023-10-14" @default.
- W2969715999 title "Ion exchange membranes enhance the electrokinetic in situ chemical oxidation of PAH-contaminated soil" @default.
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- W2969715999 doi "https://doi.org/10.1016/j.jhazmat.2019.121042" @default.
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