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Predominant mechanisms for the removal of nickel metal ion from aqueous solution using cement kiln dust

Abd Ali, Ziad T., Naji, Laith A., Almuktar, Suhad A.A.A.N., Faisal, Ayad A.H., Abed, Suhail N., Scholz, Miklas, Naushad, Mu. and Ahamad, Tansir 2020. Predominant mechanisms for the removal of nickel metal ion from aqueous solution using cement kiln dust. Journal of Water Process Engineering 33 , 101033. 10.1016/j.jwpe.2019.101033

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Abstract

The experimental methodology achieved in the present study signified that the adsorption and precipitation were main mechanisms occurred together in the removal of nickel from aqueous solution by sorption using cement kiln dust (CKD) byproduct as sorbent. Finding the contribution of each mechanism in the removal process and derivation an analytical model for finding the portion of precipitation were the focal points of this work. Results proved that pure precipitation was increased with the increase of CKD dosage and metal concentration where total removal (adsorption-precipitation) ranged from 45 to 100%. The SEM micrographs of the CKD sorbent before and after sorption process certified that there was crystal precipitates on the surface of the CKD. Also, these graphs in combination with FT-IR tests proved that [Ni(OH2)n]+2 (n=4-6) species were bonded with CKD and insoluble hydroxide species may be precipitated onto the CaO surfaces by co-precipitation, while K–O, Si-O and Ca-O groups enhanced the adsorption mechanism.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Elsevier
ISSN: 2214-7144
Date of Acceptance: 27 October 2019
Last Modified: 26 Jul 2022 15:15
URI: https://orca.cardiff.ac.uk/id/eprint/150456

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