Rational Synthesis of Novel Phosphorylated Chitosan-Carboxymethyl Cellulose Composite for Highly Effective Decontamination of U(VI)

By Yawen Cai, Lei Chen, Shitong Yang, Lin Xu, Haibo Qin, Zhiyong Liu, Lanhua Chen, Xiangke Wang, Shuao Wang. ACS Sustainable Chemistry and Engineering, 2019

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In the present study, the phosphorylated chitosan (CSP) and phosphate-decorated carboxymethyl cellulose (CMCP) were cross-linked to synthesize a water-stable CSP-CMCP composite. Fourier transform infrared spectroscopy (FTIR) analyses indicated the occurrence of a dehydration-condensation reaction between amino and carboxyl groups as well as the introduction of abundant phosphate sites on CSP-CMCP surfaces. The maximum adsorption capacity of CSP-CMCP toward U(VI) (i.e., 977.54 mg/g at pH = 5.0 and T = 293 K) was superior to a series of adsorbents reported in the previous studies. In addition, CSP-CMCP showed an extremely high affinity for the selective capture of U(VI) from a simulated wastewater with multiple competing metal ions. The integrated analyses of X-ray diffraction, FTIR, X-ray photoelectron spectroscopy, X-ray absorption near edge structure, and extended X-ray absorption fine structure spectroscopy suggested that the predominant U(VI) species formed inner-sphere surface complexes with the activ...

Subfields: Inorganic Chemistry, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/512a471ec143a1bc1b0d2d2a5996177de7ccca77