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- W2050409820 abstract "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." @default.
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- W2050409820 date "2012-11-01" @default.
- W2050409820 modified "2023-10-12" @default.
- W2050409820 title "Adsorption of aqueous Hg(II) by a polyaniline/attapulgite composite" @default.
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- W2050409820 doi "https://doi.org/10.1016/j.cej.2012.09.057" @default.
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