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        Effect of Paecilomyces cateniannulatus on the adsorption of nickel onto graphene oxide

        Xiaoyu Li,Fengbo Li,Lejin Fang 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.12

        Graphene oxide (GO) was synthesized by chemical oxidation method and used to remove nickel (Ni(II)) from aqueous solutions in the presence of Paecilomyces cateniannulatus (P. cateniannulatus). Based on characteristic results, it was demonstrated that P. cateniannulatus was easily combined with carboxyl groups of GO by covalent bond. The adsorption results showed that P. cateniannulatus facilitated the adsorption of Ni(II) on GO over a wide range of pH. The maximum adsorption capacities of GO+P. cateniannulatus and GO calculated from Langmuir model at pH 4.0 and T=303 K were 104.2 and 81.3mg·g−1, respectively. According to the analysis of thermodynamic parameters, the adsorption of Ni(II) on GO+P. cateniannulatus was endothermic and spontaneous. The highlight of this study quantitatively assessed the effect of bacteria on the fate and transports of heavy metals in near-surface geologic systems.

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