Efficient Removal Of U(VI) Ions from Aqueous Solutions by Tannic Acid/Graphene Oxide Composites

Applied Sciences

Zhen Zhang¹  Bowu Zhu¹  Zhijun Guo¹  Bin Liu¹  Fuxiang Song¹ 

[1] School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;

关键词: tannic acid;    graphene oxide;    uranium;    adsorption;   

DOI  :  10.3390/app10248870

来源: DOAJ

【 摘 要 】

Tannic acid/graphene oxide (TA/GO) composites were prepared in the present research, and their properties and sorption performance were evaluated by corresponding characterization methods and bath sorption experiments, respectively. The applications of TA/GO to remove U(VI) from aqueous solution were investigated with the maximum adsorption capacity of 87.8 mg·g⁻¹ at low pH (pH = 3.6 ± 0.03). The sorption of U(VI) ions on TA/GO followed the Langmuir model because of the complexation of oxygen-containing functional groups on the surface of TA/GO composites and uranium ions. TA/GO manifested excellent selective adsorption toward uranium ions with other metal ions (Cs⁺, Sr²⁺, Co²⁺). Furthermore, TA/GO as an effective adsorbent was reused to remove a large amount of U(VI) ions from aqueous solution. Therefore, TA/GO is an ideal material to remove highly toxic U(VI) ions from wastewater.

【 授权许可】

Unknown