Magnetic chitosan nanoparticles for removal of Cr(VI) from aqueous solution |
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| Authors: | Nguyen Ngoc Thinh Pham Thi Bich Hanh Le Thi Thanh Ha Le Ngoc Anh Tran Vinh Hoang Vu Dinh Hoang Le Hai Dang Nguyen Van Khoi Tran Dai Lam |
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| Affiliation: | 1. School of Chemical Engineering, Hanoi University of Science and Technology, 1, Dai Co Viet Road, Hanoi, Viet Nam;2. Institute of Chemistry, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Road, Hanoi, Viet Nam;3. Institute of Marine Geology and Geophysics, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Road, Hanoi, Viet Nam;4. Hanoi National University of Education,136 Xuan Thuy, Hanoi, Viet Nam;5. Institute of Materials Science, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Road, Hanoi, Viet Nam |
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| Abstract: | A simple method was introduced to prepare magnetic chitosan nanoparticles by co-precipitation via epichlorohydrin cross-linking reaction. The average size of magnetic chitosan nanoparticles is estimated at ca. 30 nm. It was found that the adsorption of Cr(VI) was highly pH-dependent and its kinetics follows the pseudo-second-order model. Maximum adsorption capacity (at pH 3, room temperature) was calculated as 55.80 mg·g? 1, according to Langmuir isotherm model. The nanoparticles were thoroughly characterized before and after Cr(VI) adsorption. From this result, it can be suggested that magnetic chitosan nanoparticles could serve as a promising adsorbent for Cr(VI) in wastewater treatment technology. |
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