Synthesis and characterization of Cuo coated montmorillonite and its effect on Mercury (Ii) ions removal from aqueous media

Davidson E. Egirani, Mohd Talib Latif, Nanfe R. Poyi, Napoleon Wessey, Shukla Acharjee

Research output: Contribution to journalArticle

Abstract

This paper investigated the synthesis, characterization of CuO coated montmorillonite and its application in mercury ion removal. The synthesis involved trimetric process, while the characterization was carried out with the application of standard laboratory procedures. The mercury adsorption on ACOR CuO coated montmorillonite was investigated under batch mode conditions at an ambient temperature. The reaction mechanism indicated a proton coefficient less than one, a mass transfer rates similar to those of uncoated montmorillonite and an intraparticle diffusion of an intercept C equal to 366.43. The latter value was higher than that for uncoated montmorillonite. The adsorption properties including the mercury initial concentration, the particle concentration and the ageing effect differed when compared to those of uncoated montmorillonite. The reactions based on the metal initial concentration indicated that the active sites of ACOR CuO coated montmorillonite were not saturated. The reactions based on Cp solid concentration demonstrated a complex change of the quantity of adsorption decreasing initially to 0.008kg L-1 and then increasing to Cp. The specific surface area decrease, the particle size increase, the mineral aggregation and the concentration gradient controlled the complex adsorption changes. Based on pH variation, the differences in the magnitude and the characteristics of the adsorption capacity (715 mg kg-1 - 785 mg kg-1) were linked to the reactive support of CuO coating and the increased reorganization of the active sites controlled essentially by hydrolysis. This was explained with protonation decrease and hydroxylation increase with pH increase.

Original languageEnglish
Pages (from-to)830-840
Number of pages11
JournalJournal of Chemical Technology and Metallurgy
Volume53
Issue number5
Publication statusPublished - 1 Jan 2018

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Bentonite
Clay minerals
Mercury
Ions
Adsorption
Hydroxylation
Protonation
Specific surface area
Minerals
Protons
Hydrolysis
Mass transfer
Agglomeration
Aging of materials
Metals
Particle size
Coatings

Keywords

  • Ageing
  • Characterization
  • Coating
  • Kaolinite
  • Mercury
  • Synthesis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Synthesis and characterization of Cuo coated montmorillonite and its effect on Mercury (Ii) ions removal from aqueous media. / Egirani, Davidson E.; Latif, Mohd Talib; Poyi, Nanfe R.; Wessey, Napoleon; Acharjee, Shukla.

In: Journal of Chemical Technology and Metallurgy, Vol. 53, No. 5, 01.01.2018, p. 830-840.

Research output: Contribution to journalArticle

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