Selective removal of cesium by ammonium molybdophosphate - polyacrylonitrile bead and membrane.

Author(s) Ding, D.; Zhang, Z.; Chen, R.; Cai, T.
Journal J Hazard Mater
Date Published 2017 Feb 15

The selective removal of radionuclides with extremely low concentrations from environmental medium remains a big challenge. Ammonium molybdophosphate possess considerable selectivity towards cesium ion (Cs(+)) due to the specific ion exchange between Cs(+) and NH4(+). Ammonium molybdophosphate - polyacrylonitrile (AMP-PAN) membrane was successfully prepared for the first time in this study. Efficient removal of Cs(+) (95.7%, 94.1% and 91.3% of 1mgL(-1)) from solutions with high ionic strength (400mgL(-1) of Na(+), Ca(2+) or K(+)) was achieved by AMP-PAN composite. Multilayer chemical adsorption process was testified through kinetic and isotherm studies. The estimated maximum adsorption capacities even reached 138.9±21.3mgg(-1). Specifically, the liquid film diffusion was identified as the rate-limiting step throughout the removal process. Finally, AMP-PAN membrane could eliminate Cs(+) from water effectively through the filtration adsorption process.

DOI 10.1016/j.jhazmat.2016.11.054
ISSN 1873-3336
Citation J Hazard Mater. 2017;324(Pt B):753761.

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