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Title: Integrated forward osmosis-adsorption process for strontium-containing water treatment: pre-concentration and solidification
Authors: Zhang, Xiaoyuan
Liu, Yu
Keywords: Engineering::Environmental engineering
Issue Date: 2021
Source: Zhang, X. & Liu, Y. (2021). Integrated forward osmosis-adsorption process for strontium-containing water treatment: pre-concentration and solidification. Journal of Hazardous Materials, 414, 125518-.
Project: 2019-T1-001-092
Journal: Journal of Hazardous Materials 
Abstract: The volume reduction and subsequent solidification of soluble radionuclides have been known as the major challenges in global radioactive water management, with the urgent needs for new technology development. Thus, a novel forward osmosis (FO)-adsorption process was developed for decontamination of strontium-containing radioactive water. The FO filtration driven by the osmotic pressure difference across FO membrane was more cost- and energy-effective for pre-concentration and volume reduction of low-concentration radioactive water prior to solidification, whereas subsequent adsorption with a novel adsorbent offered an effective mean for high-efficiency fixation of soluble radioactive on adsorbent. Results showed that the FO unit in the proposed integrated process could lead to a concentration factor of 10, with 90% of water volume reduction. The concentrated stream with a smaller volume from FO was further treated through adsorption of Sr2+ by nanostructured layered sodium vanadosilicate which had an excellent adsorption capacity of 174.3 mg Sr2+/g. It was found that 96.8-99.9% of soluble Sr2+ in FO concentrate could be removed by adsorption within several seconds. As the result, an excellent solidification of Sr2+ with an ultimate concentration factor of 1000 was achieved in the proposed novel integrated FO-adsorption process. These clearly demonstrated that this process would offer an environmentally sustainable and economically viable engineering solution for high-efficiency decontamination of Sr2+-containing radioactive water.
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2021.125518
Schools: School of Civil and Environmental Engineering 
Research Centres: Advanced Environmental Biotechnology Centre (AEBC) 
Nanyang Environment and Water Research Institute 
Rights: © 2021 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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