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Adsorption of Cu(II) ions from aqueous solutions on modified chrysotile: Thermodynamic and kinetic studies
Abstract The adsorption of Cu(II) ions by modified chrysotile from aqueous solution was investigated under different experimental conditions. The Langmuir and Freundlich equations were introduced to describe the linear forms about the adsorption of Cu(II) ions on the surface of modified chrysotile, and it was found that the adsorption equilibrium process was well described by the Langmuir isotherm model with the maximum adsorption capacity of 1.574mmol/g at 333K. The thermodynamic parameters (ΔG0, ΔH0 and ΔS0) for adsorption on modified chrysotile were also determined from the temperature dependence. The influences of specific parameters such as temperature, pH value and initial concentration for the kinetic studies were also examined. The adsorption follows a pseudo-second order rate law.
Graphical abstract The natural mineral of chrysotile was modified by γ-Aminopropyltriethoxysilane in water and then used as adsorbent for Cu(II) from aqueous solution. The results indicated that the modified chrysotile was a kind of highly efficient and promising adsorbent for Cu(II) with an adsorption capacity of more than 1.3mmol/g, which was superior to most of adsorbents reported by others. The thermodynamics and kinetics of the Cu(II) adsorption were investigated in detail, which would help us to understand the adsorption character and process. Display Omitted
Highlights Chrysotile is modified by γ-APS in water to prepare adsorbent for Cu(II) adsorption. The modified chrysotile is an efficient adsorbent with low cost and high performance. The maximum adsorption capacity is 1.574mmol/g at 333K by Langmuir model. The reaction for Cu(II) adsorption is found to be endothermic nature. The pseudo-second order kinetic model correlates excellently with the adsorption.
Adsorption of Cu(II) ions from aqueous solutions on modified chrysotile: Thermodynamic and kinetic studies
Abstract The adsorption of Cu(II) ions by modified chrysotile from aqueous solution was investigated under different experimental conditions. The Langmuir and Freundlich equations were introduced to describe the linear forms about the adsorption of Cu(II) ions on the surface of modified chrysotile, and it was found that the adsorption equilibrium process was well described by the Langmuir isotherm model with the maximum adsorption capacity of 1.574mmol/g at 333K. The thermodynamic parameters (ΔG0, ΔH0 and ΔS0) for adsorption on modified chrysotile were also determined from the temperature dependence. The influences of specific parameters such as temperature, pH value and initial concentration for the kinetic studies were also examined. The adsorption follows a pseudo-second order rate law.
Graphical abstract The natural mineral of chrysotile was modified by γ-Aminopropyltriethoxysilane in water and then used as adsorbent for Cu(II) from aqueous solution. The results indicated that the modified chrysotile was a kind of highly efficient and promising adsorbent for Cu(II) with an adsorption capacity of more than 1.3mmol/g, which was superior to most of adsorbents reported by others. The thermodynamics and kinetics of the Cu(II) adsorption were investigated in detail, which would help us to understand the adsorption character and process. Display Omitted
Highlights Chrysotile is modified by γ-APS in water to prepare adsorbent for Cu(II) adsorption. The modified chrysotile is an efficient adsorbent with low cost and high performance. The maximum adsorption capacity is 1.574mmol/g at 333K by Langmuir model. The reaction for Cu(II) adsorption is found to be endothermic nature. The pseudo-second order kinetic model correlates excellently with the adsorption.
Adsorption of Cu(II) ions from aqueous solutions on modified chrysotile: Thermodynamic and kinetic studies
Liu, Kun (Autor:in) / Zhu, Binnan (Autor:in) / Feng, Qiming (Autor:in) / Wang, Qian (Autor:in) / Duan, Tao (Autor:in) / Ou, Leming (Autor:in) / Zhang, Guofan (Autor:in) / Lu, Yiping (Autor:in)
Applied Clay Science ; 80-81 ; 38-45
25.05.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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