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هشتمین کنگره ملی مهندسی عمران
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  • effect of reversed-direct current in combination of electrokinetic and prb on remediation of tce-contaminated soil

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 790
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     remediation of soils contaminated with chlorinated hydrophobic organic compounds (chocs) remains a challenge for environmental scientists worldwide. in the present study electrokinetic technology was coupled with permeable reactive barrier (prb) composed of micro-scale fe to treat a tetrachloroethylene (tce)-contaminated soil. a nonionic surfactant, triton x-100, was selected as the solubility enhancing agent. four bench-scale tests (t1 to t4) were conducted to investigate the effect of revised direct current in ek-prb method on removal of tce-contaminated soil under potential gradient of 1 v.cm-1 for 10 days. cumulative electro-osmosis flow, electrical current and ph in anode and cathode reservoir were measured every 24h during the run. in t4, direction of current was reserved after 5 day for investigation of tce-remove in the cathode column by fe-prb method. results showed that the tce removal was generally increased in anode and cathode by revised current in ek-prb test compared with ek-prb test without revised current (73% in anode, 64% in cathode versus 24% in anode and 18% in cathode).

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