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Cobalt and zinc removal from aqueous solution by chemically treated bentonite

Author

Listed:
  • Reyad A. Shawabkeh

    (Mutah University)

  • Omar A. Al-Khashman

    (Al-Hussein Bin Talal University)

  • Hamzeh S. Al-Omari

    (Mutah University)

  • Ali F. Shawabkeh

    (Al-Balqa Applied University)

Abstract

Natural bentonite was treated by hydrochloric, nitric, and phosphoric acids followed by washing with sodium hydroxide in order to enhance its adsorption capacity. The sample that treated with hydrochloric acid followed by further treatment with NaOH showed the highest cation exchange capacity with a value of 51.20 meq/100 g. The zero-point of charge for this sample was found to be 4.50. Adsorption isotherms for both cobalt and zinc were fitted using Langmuir, Freundlich, and Redlich-Peterson and showed an adsorption capacity of 138.1 mg Co2+ and 202.6 mg Zn2+ per gram of treated sample.

Suggested Citation

  • Reyad A. Shawabkeh & Omar A. Al-Khashman & Hamzeh S. Al-Omari & Ali F. Shawabkeh, 2007. "Cobalt and zinc removal from aqueous solution by chemically treated bentonite," Environment Systems and Decisions, Springer, vol. 27(3), pages 357-363, September.
    • Handle: RePEc:spr:envsyd:v:27:y:2007:i:3:d:10.1007_s10669-007-9048-1
    DOI: 10.1007/s10669-007-9048-1
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    References listed on IDEAS

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    1. M. N. Rashed, 2001. "Lead removal from contaminated water using mineral adsorbents," Environment Systems and Decisions, Springer, vol. 21(3), pages 187-195, September.
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    Cited by:

    1. Haji, Maha N. & Slocum, Alexander H., 2019. "An offshore solution to cobalt shortages via adsorption-based harvesting from seawater," Renewable and Sustainable Energy Reviews, Elsevier, vol. 105(C), pages 301-309.

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