点击次数：

论文类型：期刊论文

发表时间：2019-12-01

发表刊物：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录刊物：PubMed、SCIE

卷号：141

页面范围：987-996

ISSN号：0141-8130

关键字：Radioactive iodide ion; Chitosan; Hydrophobic modified montmorillonite; Pickering emulsion; Adsorption

摘要：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.