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Study on optimal conditions and adsorption kinetics of copper from water by collodion membrane cross-linked poly-γ-glutamic acid

  • Separation Technology, Thermodynamics
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Abstract

Poly-γ-glutamic acid (γ-PGA) is a novel polyamino acid formed through microorganism fermentation and biosynthesis. In the present test, membrane (PGA-C) formation by γ-PGA and collodion was performed by using 0.1% glutaraldehyde as a cross-linking agent. A study was conducted on the PGA-C adsorption of Cu2+, specifically the related adsorption equilibrium and kinetics, desorption and regeneration. The results show that with an initial solution pH=5.5 and at 318 K, the static adsorption isotherm behavior of PGA-C is in compliance with the Langmuir model and is beneficial to the adsorption of the metal. Meanwhile, with the reaction lasting for 30min, adsorption equilibrium was reached with a maximum adsorption capacity up to 7.431 mg/g. The entire reaction process follows the pseudo-second-order kinetics. By using PGA-C, good regeneration results were obtained after adsorption-generation-adsorption cycling with an HCl solution (0.1 mol/L) as regeneration liquid.

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Authors and Affiliations

  1. College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, P. R. China

    Xiangting Wu, Xinjiao Dong & Mingjiang Wu

  2. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China

    Aiyin Wang & Guoxing Li

  3. Wenzhou Vocational College of Technology and Science, Wenzhou, 325035, P. R. China

    Xiaojie Zheng

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  1. Xiangting Wu
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  2. Aiyin Wang
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  3. Xiaojie Zheng
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  4. Guoxing Li
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  5. Xinjiao Dong
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  6. Mingjiang Wu
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Correspondence to Xiangting Wu.

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Wu, X., Wang, A., Zheng, X. et al. Study on optimal conditions and adsorption kinetics of copper from water by collodion membrane cross-linked poly-γ-glutamic acid. Korean J. Chem. Eng. 30, 1295–1300 (2013). https://doi.org/10.1007/s11814-013-0051-6

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  • DOI: https://doi.org/10.1007/s11814-013-0051-6

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