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نویسندگان مقالات پربازدید :
مجله مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • adsorption of aqueous hg(ii) by a polyaniline/attapulgite composite

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 617
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     a novel polyaniline/attapulgite (pani/atp) composite was synthesized and investigated for adsorption of hg(ii) from aqueous solutions. a chemical oxidation method was employed for polymerization of aniline on the attapulgite template to obtain a significantly enlarged bet surface area of the adsorbent. associated adsorption mechanism was also investigated by means of electrophoretic mobility (em) and x-ray photoelectron spectroscopy (xps) techniques. due to a specific coordination between mercury and the amine functional groups on the polyaniline molecular chain, the pani/atp achieved a maximum mercury adsorption capacity of over 800 mg g−1. the solution ph values had a major impact on hg(ii) adsorption by this adsorbent with optimal removal observed around ph 5–9. kinetic study showed that the hg(ii) adsorption by pani/atp fitted a pseudo-second-order kinetic model, indicating that the hg(ii) adsorption process was predominantly controlled by chemical process. it was also proved that the adsorbed hg(ii) could be effectively desorbed from the pani/atp with a solution containing 75% acetic acid and 1% thiocarbamide. the adsorption capacity of the regenerated adsorbents could still be maintained at 93% by the fifth adsorption–desorption cycle.

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