Adsorption of Ni(II) by a thermo-sensitive colloid: methylcellulose/calcium alginate beads
文献类型： 外文期刊
作者： Li, Zhongmin 1 ; Wu, Wanwan 1 ; Jiang, Wenyan 2 ; Wei, Guangtao 2 ; Li, Yunshang 2 ; Zhang, Linye 1 ;
作者机构： 1.Guangxi Univ, Dept Energy Chem Engn, Nanning, Peoples R China
2.Guangxi Univ, Dept Chem Engn, Nanning, Peoples R China
3.Guangxi Acad Agr Sci, Agroprod Qual Safety & Testing Technol Res Inst, Nanning, Peoples R China
关键词： adsorption; methylcellulose; Ni(II); sodium alginate; thermo-sensitive colloid
期刊名称：JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA （ 影响因子：1.644； 五年影响因子：1.764 ）
ISSN： 0003-7214
年卷期： 2019 年 68 卷 7 期
页码：
收录情况： SCI
摘要： The adsorption of Ni(II) by a thermo-sensitive adsorbent of methylcellulose/calcium alginate beads (CAMCBs) was studied using batch adsorption tests to determine the adsorption process and properties, the effects of adsorbent dosage, initial concentration, adsorption time and temperature. The adsorption process was further investigated using kinetics, isotherms and thermodynamic methods. The kinetics and isotherms studies showed the adsorption of Ni(II) on CAMCBs was fitted by the pseudo-second-order kinetic model and Langmuir isothermal adsorption model, respectively. The thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic at lower temperature, and the entropy of the adsorption process was negative. In the study of regeneration, it was confirmed that under the temperature of 60 degrees C, the desorption agent of CaCl2 with concentration of 3 g center dot L-1 was more conducive to the desorption of Ni(II) from CAMCBs. Both adsorption capacity and mechanical strength of the used CAMCBs could be basically recovered to the level of fresh CAMCBs after desorption. The prepared CAMCBs had a good property of adsorption of Ni(II) and an excellent regeneration performance.
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