Walnut shell supported nanoscale Fe0 for the removal of Cu(II) and Ni(II) ions from water |
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| Authors: | Facui Yang Yuanyuan He Shiqi Sun Yue Chang Fei Zha Ziqiang Lei |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu, China;2. Key Laboratory of Eco‐Environment‐related Polymer Materials Ministry of Education, Lanzhou, Gansu, China;3. Key Laboratory of Polymer Material of Gansu Province, Lanzhou, Gansu, China |
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| Abstract: | The walnut shell supported nanoscale zero‐valent iron (walnut‐nZVI) was prepared from sodium borohydride, iron(II) chloride tetrahydrate, and walnut shell by liquid phase chemical reduction and characterized by FTIR, TEM, and XRD. The composites were tested as adsorbent for the removal of Cu(II) or Ni(II) ions. The equilibrium data were analyzed by the Langmuir, Freundlich, Dubinin–Radushkevich, which revealed that Langmuir isotherm was more suitable for describing Cu(II) and Ni(II) ions adsorption than the other two isotherm models. The results indicated that the maximum adsorption capacity was higher than some other modified biomass waste adsorbents under the proposed conditions, were 458.7, 327.9 mg g?1 for Cu(II) or Ni(II). The adsorption kinetics data indicated that the adsorption fitted well with the pseudo‐second‐order kinetic model. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43304. |
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| Keywords: | adsorption cellulose and other wood products fibers kinetics magnetism and magnetic properties |
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