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Bioresour Technol. 2016 Aug;214:192-198. doi: 10.1016/j.biortech.2016.04.096. Epub 2016 Apr 22.

Poly(vinyl alcohol) and alginate cross-linked matrix with immobilized Prussian blue and ion exchange resin for cesium removal from waters.

Author information

1
Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
2
Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
3
Taipei Water Department, Taipei City Government, Taipei 106, Taiwan.
4
R&D Center for Membrane Technology, Department of Chemical Engineering, Chuan Yuan Christian University, Chungli 32023, Taiwan.
5
Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan; R&D Center for Membrane Technology, Department of Chemical Engineering, Chuan Yuan Christian University, Chungli 32023, Taiwan. Electronic address: djlee@ntu.edu.tw.

Abstract

Cesium (Cs) removal from contaminated water bodies is an emerging issue after the disaster at the Fukushima Daiichi Nuclear Power Plant. The Prussian blue (PB) is an effective Cs adsorbent but will release hexacyanoferrate fragments from the adsorbent matrix during adsorption. Alginate is an affordable biopolymer for PB particles immobilization. This study synthesized poly(vinyl alcohol) (PVA) and alginate cross-linked matrix for immobilization of PB nano-sized particles and a surface-modified styrene-ethyl styrene divinyl benzene resin and tested their swelling stability and Cs adsorption performance in fresh water and in seawater. The PVA-alginate granules have high structural stability in both fresh water and seawater, with the Cs adsorption capability higher for the former than the latter. The adopted resin effectively remove released PB fragments from the tested granules. The transport and reaction parameters for the granules and for the sand filter bed were estimated.

KEYWORDS:

Cesium; Granules; Ion exchange; Prussian blue; Seawater

PMID:
27132227
DOI:
10.1016/j.biortech.2016.04.096
[Indexed for MEDLINE]

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