Synthesis of hydrous zirconium oxide-impregnated chitosan beads and their application for removal of fluoride and lead
| Autor: | Yoojin Jeong, Hocheol Song, Rajesh Kumar, Byong-Hun Jeon, In-Hyun Nam, Ui-Kyu Choi, Dong-Wan Cho |
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| Rok vydání: | 2016 |
| Předmět: |
Aqueous solution
Materials science Inorganic chemistry Composite number Cationic polymerization General Physics and Astronomy Langmuir adsorption model Sorption 02 engineering and technology Surfaces and Interfaces General Chemistry 010501 environmental sciences 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Chitosan symbols.namesake chemistry.chemical_compound Adsorption chemistry symbols 0210 nano-technology Fluoride 0105 earth and related environmental sciences |
| Zdroj: | Applied Surface Science. 372:13-19 |
| ISSN: | 0169-4332 |
| Popis: | A composite adsorbent capable of simultaneous removal of both cationic and anionic contaminants from aqueous solutions was developed by impregnating hydrous zirconium oxide (HZO) into chitosan beads (CB). The optimal mass ratio of chitosan to HZO was 2:2. The composite adsorbent (HZOCB) had the rugged surface (52.74 m 2 g −1 ) with irregular cracks caused by HZO inclusion and amine functional groups. The rate of Pb 2+ adsorption by HZOCB was relatively rapid. Most of Pb 2+ (89%) was adsorbed within 2.5 h. A binary sorbate system was noticeably favorable for F − adsorption as compared to single sorbate system. Adsorption of F − and Pb 2+ followed pseudo-second order kinetics. The maximum sorption capacities obtained from Langmuir isotherm model were 22.1 and 222.2 mg g −1 , respectively. The study demonstrates that the developed composite could be a potential adsorbent for the simultaneous remediation of F − and Pb 2+ contamination in water. |
| Databáze: | OpenAIRE |
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