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Zheng M, Lian F, Xiong Y, Liu B, Zhu Y, Miao S, Zhang L, Zheng B. The synthesis and characterization of a xanthan gum-acrylamide-trimethylolpropane triglycidyl ether hydrogel. Food Chem 2019; 272:574-579. [DOI: 10.1016/j.foodchem.2018.08.083] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 07/28/2018] [Accepted: 08/20/2018] [Indexed: 11/15/2022]
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Zheng M, Lian F, Zhu Y, Liu B, Chen Z, Zhang Y, Zheng B, Zhang L. Modified xanthan gum for crystal violet uptake: kinetic, isotherm, and thermodynamic behaviors. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2019; 79:165-174. [PMID: 30816873 DOI: 10.2166/wst.2019.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Modified xanthan gum (XG-AM-TTE) was employed as an adsorbent to study the adsorption behavior, thermodynamics and kinetics of crystal violet (CV) from an aqueous solution. Fourier transform infrared spectroscopy analysis indicates that the functional groups present in the adsorbent, such as carboxyl, ester and hydroxyl groups, are included on the external surface of the material, and these groups are potential active sites for interaction with CV. According to X-ray diffraction results, the structure of XG-AM-TTE after CV adsorption became more disordered, and the microstructure change is an indication of effective adsorption of CV to the surface, with CV becoming remarkably dispersed in the adsorbent according to the scanning electron microscopy observations. The adsorption kinetics and adsorption equilibrium were best described by the pseudo-second-order model and Freundlich isotherms, respectively. The thermodynamic parameters, as the Gibbs-free energy (ΔG), enthalpy (ΔH) and entropy (ΔS), indicated that the adsorption is a spontaneous, endothermic and entropy increase process. The maximum adsorption capacity of XG-AM-TTE was 183 ± 12 mg/g, suggesting that XG-AM-TTE is an efficient adsorbent.
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Affiliation(s)
- Meixia Zheng
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China
| | - Fengli Lian
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structural Design, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; and Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China E-mail:
| | - Yujing Zhu
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China
| | - Bo Liu
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China
| | - Zheng Chen
- Agricultural Bio-Resources Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China
| | - Yi Zhang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structural Design, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; and Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China E-mail:
| | - Baodong Zheng
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structural Design, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; and Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China E-mail:
| | - Longtao Zhang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; China-Ireland International Cooperation Centre for Food Material Science and Structural Design, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; and Fujian Provincial Key Laboratory of Quality Science and Processing Technology in Special Starch, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China E-mail:
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