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کلوئیدها و سطوح الف: جنبه های فیزیکوشیمیایی و مهندسی
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  • electrocatalytic dechlorination of 2,4-dichlorophenol in aqueous solution on palladium loaded meshed titanium electrode modified with polymeric pyrrole and surfactant

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1089
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     the electrochemically reductive dechlorination of 2,4-dichlorophenol (2,4-dcp) in aqueous solution on palladium/polymeric pyrrole–sodium dodecyl sulfonate film/meshed titanium electrode (pd/ppy–sls/ti electrode) was investigated in this paper. the pd/ppy–sls/ti electrode was prepared by electrodesposition and characterized in terms of surface morphology (sem), structural feature (xrd), specific surface area (bet) and pd loading level (icp-aes). effects of the dechlorination current and the initial ph value of the solution on the removal efficiency and the current efficiency were studied in the 2,4-dcp dechlorination process on pd/ppy–sls/ti electrode. effective removal of 2,4-dcp was achieved with removal efficiency of 100% and current efficiency of 33.9% in the presence of 100 mg l−1 2,4-dcp under the conditions of initial ph of 2.36, dechlorination current of 5 ma and dechlorination time of 70 min. the intermediate products were 2-chlorophenol (2-cp) and 4-chlorophenol (4-cp). the final products were mainly phenol. its further reduction product cyclohexanone was also detected. the stability of the electrode was good that the dechlorination efficiency was maintained at 100% after having been reused 8 times. the stable electrode demonstrated a promising application prospect in dechlorination process with high effectiveness and low cost.

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