title: Poly(vinyl alcohol) and alginate cross-linked matrix with immobilized Prussian blue and ion exchange resin for cesium removal from waters.
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.
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
authors.forename: Yu-Chen
authors.initials: YC
authors.lastname: Lai
authors.affiliation: Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
authors.forename: Yin-Ru
authors.initials: YR
authors.lastname: Chang
authors.affiliation: Taipei Water Department, Taipei City Government, Taipei 106, Taiwan.
authors.forename: Man-Li
authors.initials: ML
authors.lastname: Chen
authors.affiliation: Taipei Water Department, Taipei City Government, Taipei 106, Taiwan.
authors.forename: Yu-Kuo
authors.initials: YK
authors.lastname: Lo
authors.affiliation: R&D Center for Membrane Technology, Department of Chemical Engineering, Chuan Yuan Christian University, Chungli 32023, Taiwan.
authors.forename: Juin-Yih
authors.initials: JY
authors.lastname: Lai
authors.affiliation: 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.
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D000327:Adsorption; D000464:Alginates; D002586:Cesium / Q000737:chemistry / Q000302:isolation & purification*; D005295:Ferrocyanides; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D007475:Ion Exchange Resins / Q000737:chemistry; D011142:Polyvinyl Alcohol; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000464:Alginates; D005295:Ferrocyanides; D006603:Hexuronic Acids; D007475:Ion Exchange Resins; D014874:Water Pollutants, Chemical; D002586:Cesium; D020723:Glucuronic Acid; D011142:Polyvinyl Alcohol; C000170:ferric ferrocyanide
keywords: Cesium; Granules; Ion exchange; Prussian blue; Seawater