Hong, Hye-Jin Kim, Byoung-Gyu Ryu, Jungho Park, In-Su Chung, Kang-Sup Lee, Sang Moon Lee, Jin-Bae Jeong, Hyeon Su Kim, Hyunchul Ryu, Taegong 2024-01-19T23:33:27Z 2024-01-19T23:33:27Z 2021-09-03 2018-01 0301-4797 https://pubs.kist.re.kr/handle/201004/121822 Alginate bead is a promising strontium (Sr) adsorbent in seawater, but highly concentrated Na ions caused over-swelling and damaged the hydrogel bead. To improve the mechanical stability of alginate bead, flexible foam-type zeolite-alginate composite was synthesized and Sr adsorption performance was evaluated in seawater; 1-10% zeolite immobilized alginate foams were prepared by freeze-dry technique. Immobilization of zeolite into alginate foam converted macro-pores to meso-pores which lead to more compact structure. It resulted in less swollen composite in seawater medium and exhibited highly improved mechanical stability compared with alginate bead. Besides, Sr adsorption efficiency and selectivity were enhanced by immobilization of zeolite in alginate foam due to the increase of Sr binding sites (zeolite). In particular, Sr selectivity against Na was highly improved. The 10% zeolite-alginate foam exhibited a higher log Kd of 3.3, while the pure alginate foam exhibited 2.7 in the presence of 0.1 M Na. Finally, in the real seawater, the 10% zeolite-alginate foam exhibited 1.5 times higher Sr adsorption efficiency than the pure alginate foam. This result reveals that zeolite-alginate foam composite is appropriate material for Sr removal in seawater due to its swelling resistance as well as improved Sr adsorption performance in complex media. (C) 2017 Elsevier Ltd. All rights reserved. English Academic Press Preparation of highly stable zeolite-alginate foam composite for strontium(Sr-90) removal from seawater and evaluation of Sr adsorption performance Article 10.1016/j.jenvman.2017.09.072 1 Journal of Environmental Management, v.205, pp.192 - 200 Journal of Environmental Management 205 192 200 N scie scopus 000415781600019 2-s2.0-85030311987 Environmental Sciences Environmental Sciences & Ecology Article CALCIUM ALGINATE RADIONUCLIDES POROSITY CESIUM SEPARATION SEDIMENTS EFFICIENT RECOVERY SORPTION COBALT Seawater Strontium Adsorption Alginate Zeolite Foam adsorbent