1. The Study of Amidoxime-Functionalized Cellulose Separate Th(IV) from Aqueous Solution.
- Author
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Zhi, Yiling, Duan, Guojian, Lei, Zhiwei, Chen, Hui, Zhang, Haobo, Tian, Huining, and Liu, Tonghuan
- Subjects
FOURIER transform infrared spectroscopy ,SILICONES ,ADSORPTION (Chemistry) ,SCANNING electron microscopy ,INTERFACIAL tension - Abstract
Selective extraction of low-concentration thorium (Th(IV)) from wastewater is a very important research topic. In this paper, amidoxime cellulose was synthesized, and its composition and structure were characterized by FT-IR, SEM, XPS, and elemental analysis. The adsorption experiment results showed that the adsorption reaction was a spontaneous exothermic process. When the solid–liquid ratio was 0.12 g/L and the pH value was 3.5, the adsorption percentage of the Th(IV) in water onto amidoxime-functionalized cellulose (AO-CELL) could reach over 80%. The maximum adsorption capacity can reach to 450 mg/g. At the same time, the adsorption selectivity, desorption process and reusability of the material were also studied. The results showed that the AO-CELL had a good selectivity for Th(IV) in the system with Sr
2+ , Cu2+ , Mg2+ , Zn2+ , Pb2+ , Ni2+ , and Co2+ as co-ions. In the nitric acid concentration of 0.06 mol/L system, the AO-CELL desorption rate of Th(IV) can reach 95%, and the adsorption rate of Th(IV) in aqueous solution of AO-CELL is still above 60% when the AO-CELL is reused four times. The above results show that the amidoxime cellulose adsorption material synthesized by our research group has good selective adsorption performance for Th(IV) of a low concentration in an aqueous solution and has a good practical application value. [ABSTRACT FROM AUTHOR]- Published
- 2022
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