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Majigsuren E, Byambasuren U, Bat-Amgalan M, Mendsaikhan E, Kano N, Kim HJ, Yunden G. Adsorption of Chromium (III) and Chromium (VI) Ions from Aqueous Solution Using Chitosan-Clay Composite Materials. Polymers (Basel) 2024; 16:1399. [PMID: 38794592 PMCID: PMC11125037 DOI: 10.3390/polym16101399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/28/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
In this work, biopolymer chitosan and natural clay were used to obtain composite materials. The overall aim of this study was to improve the properties (porosity, thermal stability and density) of pure chitosan beads by the addition of clay and to obtain a chitosan-based composite material for the adsorption of heavy metals from an aqueous solution, using Mongolian resources, and to study the adsorption mechanism. The natural clay was pre-treated with acid and heat to remove the impurities. The chitosan and pre-treated clay were mixed in different ratios (8:1, 8:2 and 8:3) for chemical processing to obtain a composite bead for the adsorption of chromium ions. The adsorption of Cr(III) and Cr(VI) was studied as a function of the solution pH, time, temperature, initial concentration of the chromium solution and mass of the composite bead. It was found that the composite bead obtained from the mixture of chitosan and treated clay with a mass ratio of 8:1 and 8:2 had the highest adsorption capacity (23.5 and 17.31 mg·g-1) for Cr(III) and Cr(VI), respectively, in the optimum conditions. The properties of the composite materials, prepared by mixing chitosan and clay with a ratio of 8:1 and 8:2, were investigated using XRD, SEM-EDS, BET and TG analysis. The adsorption mechanism was discussed based on the XPS analysis results. It was confirmed that the chromium ions were adsorbed in their original form, such as Cr(III) and Cr(VI), without undergoing oxidation or reduction reactions. Furthermore, Cr(III) and Cr(VI) were associated with the hydroxyl and amino groups of the composite beads during adsorption. The kinetic, thermodynamic and isothermal analysis of the adsorption process revealed that the interaction between the chitosan/clay composite bead and Cr(III) and Cr(VI) ions can be considered as a second-order endothermic reaction, as such the adsorption can be assessed using the Langmuir isotherm model. It was concluded that the composite bead could be used as an adsorbent for the removal of chromium ions.
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Affiliation(s)
- Enkhtuya Majigsuren
- Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; (E.M.); (U.B.); (M.B.-A.); (E.M.)
| | - Ulziidelger Byambasuren
- Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; (E.M.); (U.B.); (M.B.-A.); (E.M.)
| | - Munkhpurev Bat-Amgalan
- Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; (E.M.); (U.B.); (M.B.-A.); (E.M.)
- Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University, Niigata 950-2181, Japan;
| | - Enkhtuul Mendsaikhan
- Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; (E.M.); (U.B.); (M.B.-A.); (E.M.)
- Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University, Niigata 950-2181, Japan;
| | - Naoki Kano
- Department of Chemistry and Chemical Engineering, Faculty of Engineering, Niigata University, Niigata 950-2181, Japan;
| | - Hee Joon Kim
- Department of Environmental Chemistry and Chemical Engineering, School of Advanced, Engineering, Kogakuin University, Tokyo 192-0015, Japan
| | - Ganchimeg Yunden
- Department of Chemical Engineering, School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; (E.M.); (U.B.); (M.B.-A.); (E.M.)
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Zhang Y, Tong C, Chen Y, Xia X, Jiang S, Qiu C, Pang J. Advances in the construction and application of konjac glucomannan-based delivery systems. Int J Biol Macromol 2024; 262:129940. [PMID: 38320637 DOI: 10.1016/j.ijbiomac.2024.129940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/26/2024] [Accepted: 02/01/2024] [Indexed: 02/08/2024]
Abstract
Konjac glucomannan (KGM) has been widely used to deliver bioactive components due to its naturalness, non-toxicity, excellent biodegradability, biocompatibility, and other characteristics. This review presents an overview of konjac glucomannan as a matrix, and the types of konjac glucomannan-based delivery systems (such as hydrogels, food packaging films, microencapsulation, emulsions, nanomicelles) and their construction methods are introduced in detail. Furthermore, taking polyphenol compounds, probiotics, flavor substances, fatty acids, and other components as representatives, the applied research progress of konjac glucomannan-based delivery systems in food are summarized. Finally, the prospects for research directions in konjac glucomannan-based delivery systems are examined, thereby providing a theoretical basis for expanding the application of konjac glucomannan in other industries, such as food and medicine.
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Affiliation(s)
- Yanting Zhang
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China
| | - Cailing Tong
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China
| | - Yuanyuan Chen
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China
| | - Xiaolu Xia
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China
| | - Shizhong Jiang
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China
| | - Chao Qiu
- School of Food Science and Technology, Jiangnan University, 214122, China.
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, 350000, China.
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