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ISSN: 2375-3854

International Journal of Ecological Science and Environmental Engineering

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Heavy Metals Biosorption from Fertilizer Industrial Waste Water Using Rice Husk and Groundnut Husk Powder

International Journal of Ecological Science and Environmental Engineering
Vol.4 , No. 4, Publication Date: Aug. 31, 2017, Page: 35-42

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Authors

[1]	Nzelibe Humphrey Chukwuemeka, Department of Biochemistry, Faculty of Science, Ahmadu Bello University, Zaria, Nigeria.
[2]	Ibrahim Kaa Lezeya Christopher, Department of Biochemistry, Faculty of Science, Ahmadu Bello University, Zaria, Nigeria.
[3]	Oguche Mercy, Department of Biochemistry, Faculty of Science, Ahmadu Bello University, Zaria, Nigeria.

Abstract

Groundnut husk (GH) and Rice husk (RH) were used as adsorbents to remove Mn²⁺, Zn²⁺ and Pb²⁺ ions from fertilizer industrial waste water. Batch adsorption experiment was conducted to examine the effect of adsorbent mass, pH, contact time, activated carbon (standard adsorbent) on adsorption of Mn²⁺, Zn²⁺ and Pb²⁺ from fertilizer industrial waste water. The results showed that the adsorption of the metal ions was adsorbent mass, pH, and contact time dependent. The optimum adsorbent mass was 50g and 60g, optimum pH was pH 4 and pH 6 for adsorption of metal ions. The kinetic studies showed that pseudo-second order reaction model best described the adsorption process and the Langmuir biosorption isotherm provided the best fit for sorption of Mn²⁺, and Pb²⁺ using groundnut husk as indicated by their correlation coefficient (R²) of 0.558 and 0.441. The freundlich biosorption isotherm had the best fit using rice husk as indicated by their correlation coefficient (R²) of 0.730 and 0.395 for Mn(II) and Pb(II). The study also showed that groundnut husk and rice husk can be efficiently used as low cost alternative for removal of Mn²⁺, Zn²⁺ and Pb²⁺.

Keywords

Groundnut Husk, Rice Husk, Heavy Metals, Adsorption, Kinetic, Waste Water

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