Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 312, Issue 3, Pages 557-565Publisher
SPRINGER
DOI: 10.1007/s10967-017-5256-4
Keywords
beta-CD/BNC; Bentonite; Cs+; Coexistent cation; Adsorption
Funding
- Doctoral Fund of High Education Program [20134324110003]
- National Natural Science Foundation of China [11475080]
- General Program of the Hunan Provincial Education Department [15C1178]
- Graduate Student Research Innovation Project of Hunan Province [CX2016B427]
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A novel poly(beta-cyclodextrin)/bentonite composite (beta-CD/BNC) was successfully prepared through graft polymerisation by using ammonium persulphate-sodium bisulphate as initiators, and characterized by FT-IR and EDS. The equilibrium data fit Freundlich isotherm satisfactorily. Adsorption kinetic was fitted with pseudo-second-order. The maximum adsorption capacities for Cs+ by beta-CD/BNC in absence and presence of Na+ and Mg2+ were 48.83 +/- 0.35, 47.30 +/- 0.28, and 42.52 +/- 0.85 mg g(-1), respectively. Adsorption of Cs+ was suppressed by presence of Mg2+ more than Na+. beta-CD/BNC had a higher affinity to Cs+ than Na+ and Mg2+. beta-CD/BNC was an effective sorbent for the treatment cesium waste water.
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