Sorption of Pb(II), Cd(II), and Ni(II) Toxic Metal Ions by Alginate-Bentonite - Journal of Environmental Protection

JEP > Vol.4 No.1, January 2013

Journal of Environmental Protection

Volume 4, Issue 1 (January 2013)

ISSN Print: 2152-2197 ISSN Online: 2152-2219

Google-based Impact Factor: 1.15 Citations h5-index & Ranking

Sorption of Pb(II), Cd(II), and Ni(II) Toxic Metal Ions by Alginate-Bentonite ()

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DOI: 10.4236/jep.2013.41B010 6,592 Downloads 8,957 Views Citations

Author(s)

Teoh Wah Tzu, Takuma Tsuritani, Kazunori Sato

Affiliation(s)

Department of Environmental Engineering, Nagaoka University of Technology, Nagaoka, Japan.

ABSTRACT

The sorption of Pb(II), Cd(II), and Ni(II) toxic metal ions from aqueous solution by composite alginate-bentonite and alginate was investigated. The affinity and sorption capacity of the toxic metal ions for both type of samples were evaluated. The Langmuir maximum sorption capacity for each toxic metal ion increased for alginate-bentonite as compared to alginate. However, affinity for toxic metal ion remained unchanged for both alginate-bentonite and alginate in the order of Pb(II) > Cd(II) > Ni(II). Alginate-bentonite also shortens the duration required for complete sorption. Elementary mapping analysis depicts the gradient diffusion of toxic metal ions into the centre of alginate-bentonite beads indicated that sorption was contributed by surface adsorption and diffusion.

KEYWORDS

Toxic metals; Alginate; Bentonite; Wastewater

Share and Cite:

T. Tzu, T. Tsuritani and K. Sato, "Sorption of Pb(II), Cd(II), and Ni(II) Toxic Metal Ions by Alginate-Bentonite," Journal of Environmental Protection, Vol. 4 No. 1B, 2013, pp. 51-55. doi: 10.4236/jep.2013.41B010.

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