Hits:

Indexed by:Journal Papers

Date of Publication:2019-12-01

Journal:INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

Included Journals:PubMed、SCIE

Volume:141

Page Number:987-996

ISSN No.:0141-8130

Key Words:Radioactive iodide ion; Chitosan; Hydrophobic modified montmorillonite; Pickering emulsion; Adsorption

Abstract:The radioactive iodine from nuclear wastes caused severe environmental contamination and public health concern. Chitosan and montmorillonite as green materials of the favorable adsorptivity were proposed for iodine treatment. Rather than intercalation, the crosslinked chitosan proposedly via Pickering emulsion polymerization was coated by hydrophobical-modified montmorillonite (HMMT) to form the micro-composite of chitosan/HMMT (CTS/HMMT) as the iodide adsorbent of eco-safety, adsorptivity combination and chitosan-swelling limitation. From pH 3 to 10, CTS/HMMTs adsorbed I-127 anions no <90% during 40 min, with the maximum adsorption capacity of 0.3033 mmol/g, well-fitting with Langmuir isotherm model and the pseudo first-order kinetic model. CTS/HMMTs were also well regenerated within the five adsorption/desorption cycles of the nearly same adsorption efficiency, performing the high stability. Nonetheless, the CTS/HMMT adsorbents were prospective for radioactive iodine removal. (C) 2019 Elsevier B.V. All rights reserved.