Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (10): 930-938.doi: 10.11934/j.issn.1673-4831.2018.10.010

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Adsorption Characteristics of Fe2O3@GO Polymer to As3+ in Water

DENG Tian-tian, HU Ye, LIU Shuai-xia, LI Han-sheng, HOU Yu-meng   

  1. School of Environmental Studies, Henan University of Engineering, Zhengzhou 451191, China
  • Received:2018-04-27 Online:2018-10-25 Published:2018-10-25


Using graphene oxide and ferric nitrate as raw materials, Fe2O3@GO polymer was synthesized by impregnation method and applied to the adsorption of As3+ in water samples. Mass ratio of Fe/GO, pH and temperature to the adsorption effect were studied. Meanwhile, the two materials were characterized by Raman spectroscopy, FTIR, SEM. All three characterization methods show that iron has been successfully loaded onto graphene oxide. The results show that the removal rate of As3+ was positively correlated with the mass ratio of Fe/GO in the complex, and the alkaline and high temperature conditions were more conducive to the adsorption. Besides, the adsorption isotherms of As3+ on the two materials conformed to the Freundlich isotherm model, and the adsorption process was better described by pseudo-second-order model. Fe2O3@GO polymer compared with GO had greater adsorption capacity under the same conditions. When the initial concentration of As3+ was 10 mg·L-1, the equilibrium adsorption capacity of GO and Fe2O3@GO could reach to 17.95 and 31.304 mg·g-1, respectively.

Key words: graphene oxide, ferric oxide, adsorption, arsenic

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