Journal of Advanced Chemical Sciences (JACS)

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Article – Journal of Environmental Sciences

Journal of Environmental Science and Pollution Research, Volume 2,Issue 3,2016 Pages 95-98

Biosorption of Pb(II) and Ag(I) from Pulp and Paper Mill Effluent using Corn Cob (Zea mays) and Plantain Bunch Stalk (Musa paradisiaca)
C.O. Nwoko*, I. Okwara, C.E. Ihejirika,O.U. Nwosu

Biosorption is the removal of substances from solution using biological materials. The use of agro-based agricultural waste as biosorptive materials is an innovative approach towards sustainable environmental management. The suitability of locally obtained corn cob and plantain stalk in the adsorption of Pb and Ag from pulp and paper mill effluent using continuous batch technique was investigated. The results obtain showed that temperature increase affected the movement of solute and encouraged biosorption. Pb (II) and Ag(I) adsorption significantly increased as pH varies from 3 to 6. Also varying the absorbent dose to 2.0 g/L increased adsorption of Pb (II) and Ag (I), further increase did not affect Pb and Ag adsorption. The contact time also directly affected rate of adsorption, which steadily increased reaching optimum at 40 minutes. Langmuir adsorption isotherm fitted best with the data and showed correlation coefficients (R2) of 0.72, 0.990, 0.966 and 0.955 across the data. It is observed that out of the four variables only Ag on Musa paradisiaca absorbent posed a non-linear form, while others showed linear relationship that intra-particle diffusion took place and may not have only accounted for the rate of the entire reaction process.

Keywords: Activated Organic Materials; Adsorption; Paper Mill Effluent;