A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Adsorption of methylene blue and zinc ions on raw and acid-activated bentonite from Morocco
AbstractAdsorption of methylene blue (BM) and zinc ions on raw and acid-activated Moroccan bentonite composed of montmorillonite (88mass%), a mixture of quartz and K-feldspar (9mass%), calcite (3mass%) and insignificant amounts of organic matter was evaluated at 25°C using UV–visible and atomic absorption spectrometry. The adsorption capacity of MB and Zn ions by raw bentonite were about 2.2 and 1.1mmol/(g of bentonite) and the best-fit isotherm models were those of Harkins–Jura and Langmuir. Acid-activation of the bentonite reduced the maximum uptake of MB and Zn ions by 30 and 95% and the best-fit models of the isotherms were Freundlich and Dubinin–Radushkevich for MB and Zn ions respectively. The reduced adsorption was associated with partial collapse of the montmorillonite particles and the formation of amorphous silica.
Adsorption of methylene blue and zinc ions on raw and acid-activated bentonite from Morocco
AbstractAdsorption of methylene blue (BM) and zinc ions on raw and acid-activated Moroccan bentonite composed of montmorillonite (88mass%), a mixture of quartz and K-feldspar (9mass%), calcite (3mass%) and insignificant amounts of organic matter was evaluated at 25°C using UV–visible and atomic absorption spectrometry. The adsorption capacity of MB and Zn ions by raw bentonite were about 2.2 and 1.1mmol/(g of bentonite) and the best-fit isotherm models were those of Harkins–Jura and Langmuir. Acid-activation of the bentonite reduced the maximum uptake of MB and Zn ions by 30 and 95% and the best-fit models of the isotherms were Freundlich and Dubinin–Radushkevich for MB and Zn ions respectively. The reduced adsorption was associated with partial collapse of the montmorillonite particles and the formation of amorphous silica.
Adsorption of methylene blue and zinc ions on raw and acid-activated bentonite from Morocco
Hajjaji, M. (author) / El Arfaoui, H. (author)
Applied Clay Science ; 46 ; 418-421
2009-09-24
4 pages
Article (Journal)
Electronic Resource
English
<italic>A</italic> , constant in the H–J adsorption model [(mmol/g)<sup>2</sup>] , <italic>B</italic> , constant in the D–R adsorption model [(mol/J)<sup>2</sup>] , <italic>B</italic>′ , constant in the H–J adsorption model , <italic>B</italic><inf>1</inf> , constant in the Temkin adsorption model (mmol/g) , <italic>C</italic><inf>e</inf> , equilibrium concentration of ions in solution (mo/l) , <italic>E</italic> , mean free energy (J/mol) , <italic>K</italic><inf>F</inf> , Freundlich constant , <italic>K</italic><inf>L</inf> , Langmuir constant (l/mol) , <italic>K</italic><inf>T</inf> , Temkin constant (l/mol) , <italic>q</italic><inf>e</inf> , adsorbed amount at equilibrium (mmol/g) , <italic>q</italic><inf>m</inf> , adsorption capacity (mmol/g) , 1/<italic>n</italic> , constant in the Freundlich adsorption model , Bentonite , Adsorption , Methylene blue , Zinc , Acid-activated bentonite
Adsorption of methylene blue and zinc ions on raw and acid-activated bentonite from Morocco
| Online Contents | 2009
Methylene Blue Dye Adsorption to Durian Shell Activated Carbon
| British Library Online Contents | 2014
Study of adsorption of methylene blue onto activated carbon from lignite
| British Library Online Contents | 2015
| British Library Online Contents | 2012