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Davidson Egirani
Mohamed T. Latif
Nanfe R. Poyi
Napoleon Wessey
Shukla Acharjee
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Davidson Egirani
Mohamed T. Latif
Nanfe R. Poyi
Napoleon Wessey
Shukla Acharjee
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International Research Journal of Chemistry and Chemical Sciences

SYNTHESIS AND CHARACTERIZATION OF KAOLINITE COATED WITH CU-OXIDE AND ITS EFFECT ON THE REMOVAL OF AQUEOUS MERCURY(II) IONS: PART I

Davidson E. Egirani, Mohamed T. LatiF, Nanfe R. Poyi, Napoleon Wessey and Shukla Acharjee

Accepted 3 August, 2017

Citation: Egirani DE, Latif MT, Poyi NR, Wessey N, Acharjee S (2017). SYNTHESIS AND CHARACTERIZATION OF KAOLINITE COATED WITH CU-OXIDE AND ITS EFFECT ON THE REMOVAL OF AQUEOUS MERCURY(II) IONS: PARTI. International Research Journal of Chemistry and Chemical Sciences, 4(1): 055-061.

Copyright: © 2017 Egirani et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Abstract

In this paper, a novel copper oxide coated kaolinite was prepared as an adsorbent of Hg(II) ions from aqueous media. The materials used for this study were synthesized, characterised and the product tested for  mercury ion removal using standard laboratory procedures. Reactivity and removal kinetic models derived from Freundlich isotherm were used to investigate contact time and pH effects on the coefficient of protonation and rate of mass transfer of Hg(II) ions to the reactive sites, Proton coefficient of 0.89 indicated a decrease in proton consumption function when compared with uncoated kaolinite. At the 12th h reaction time, a maximum adsorption capacity of 85% was achieved. Mass transfer rates of 0.9359h-1 and 0.0748h-1 for the first and second reaction phases indicated a reduction when compared with uncoated kaolinite. These changes may be ascribed to masking of reaction sites and exposed surface area of the Cu-Oxide coated kaolinite.

Keywords: kaolinite, Cu-Oxide, contact time, pH, reactivity, removal kinetics