Effect of reversed-Direct current in combination of electrokinetic and PRB on remediation of TCE-contaminated soil
Publish place: 8th National Congress On Civil Engineering
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NCCE08_0300
تاریخ نمایه سازی: 5 مهر 1393
Abstract:
Remediation of soils contaminated with chlorinated hydrophobic organic compounds (CHOCs) remains a challenge for environmental scientists worldwide. In the present study electrokinetic technology wascoupled 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 10days. Cumulative electro-osmosis flow, electrical current and pH in anode and cathode reservoir weremeasured 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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Authors
Maryam Taghizadeh
Department of Civil and Environmental Engineering, Babol Noshirvani University of Technology, Iran
Daryoush Yousefi kebria
Assistant Professor in Civil Engineering, Babol University of Technology
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