Preparation of graphene oxide-manganese dioxide for highly efficient adsorption and separation of Th(IV)/U(VI)

Journal of Hazardous Materials
Ning PanChuanqin Xia

Abstract

Manganese dioxide decorated graphene oxide (GOM) was prepared via fixation of crystallographic MnO2 (α, γ) on the surface of graphene oxide (GO) and was explored as an adsorbent material for simultaneous removal of thorium/uranium ions from aqueous solutions. In single component systems (Th(IV) or U(VI)), the α-GOM2 (the weight ratio of GO/α-MnO2 of 2) exhibited higher maximum adsorption capacities toward both Th(IV) (497.5mg/g) and U(VI) (185.2 mg/g) than those of GO. In the binary component system (Th(IV)/U(VI)), the saturated adsorption capacity of Th(IV) (408.8 mg/g)/U(VI) (66.8 mg/g) on α-GOM2 was also higher than those on GO. Based on the analysis of various data, it was proposed that the adsorption process may involve four types of molecular interactions including coordination, electrostatic interaction, cation-pi interaction, and Lewis acid-base interaction between Th(IV)/U(VI) and α-GOM2. Finally, the Th(IV)/U(VI) ions on α-GOM2 can be separated by a two-stage desorption process with Na2CO3/EDTA. Those results displayed that the α-GOM2 may be utilized as an potential adsorbent for removing and separating Th(IV)/U(VI) ions from aqueous solutions.

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Citations

Dec 9, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiahui ZhuG A Emelchenko
Jul 13, 2017·ACS Applied Materials & Interfaces·Nan ZhangWei-Qun Shi
Jul 4, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Ayub KhanXiangke Wang
May 5, 2018·Journal of Radioanalytical and Nuclear Chemistry·H MohamudN I Ward
Nov 17, 2016·Environmental Science and Pollution Research International·Zhenling HuangChuanqin Xia
Oct 10, 2020·Global Challenges·Brian J Riley, Saehwa Chong
Nov 16, 2020·Journal of Hazardous Materials·Meiling YinTangfu Xiao
Jul 17, 2019·Environmental Pollution·Jie DingChuanqin Xia
May 3, 2019·Journal of Hazardous Materials·Zhihai FuChuanqin Xia
Jul 30, 2021·ACS Applied Materials & Interfaces·Lei XuMercouri G Kanatzidis
Sep 22, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Hai WangMuqing Qiu

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