Adsorption of etheramine on kaolinite: A cheap alternative for the treatment of mining effluents

The results of laboratory experiments aimed at determining the influence of physicochemical parameters on the adsorption of etheramine (adsorbate) on white, pink and yellow kaolinites (adsorbent) are presented. The adsorption of etheramine was favoured at pH 10.0 under conditions where the initial c...

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Bibliographic Details
Published in:Journal of hazardous materials 2010-12, Vol.184 (1-3), p.465-471
Main Authors: Magriotis, Zuy M., Leal, Paulo V.B., Sales, Priscila F., Papini, Rísia M., Viana, Paulo R.M.
Format: Article
Language:English
Subjects:
Adsorbates
Adsorbents
Adsorption
Applied sciences
Chemical engineering
Effluents
Environmental Restoration and Remediation - methods
Etheramine removal
Ethyl Ethers - chemistry
Ethylamines - chemistry
Exact sciences and technology
Flotation
Iron ore
Isotherms
Kaolin - chemistry
Kaolinite
Kinetics
Mathematical models
Mining
Models, Theoretical
Optimization
Pollution
Solid-solid systems
Thermodynamics
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Summary:The results of laboratory experiments aimed at determining the influence of physicochemical parameters on the adsorption of etheramine (adsorbate) on white, pink and yellow kaolinites (adsorbent) are presented. The adsorption of etheramine was favoured at pH 10.0 under conditions where the initial concentration of etheramine was 200mgl−1 and the ratio of adsorbent to volume of etheramine solution was 1:100gml−1. Equilibrium adsorption was attained within 30min and the efficiencies of removal of etheramine by white, pink and yellow kaolinite were 77%, 80% and 69%, respectively. The adsorption isotherms of the kaolinites were determined under optimum conditions and with adsorbate in the concentration range of 0–4000mgl−1. The amounts of etheramine adsorbed per unit mass of adsorbent were 33.03, 34.32 and 23.11mgg−1 for white, pink and yellow kaolinites, respectively. The adsorption of etheramine on kaolinites was better fitted to the Langmuir rather than the Freundlich isotherm, and could be explained by a pseudo-second-order kinetic model. It is concluded that kaolinites offer significant potential in the treatment of effluents originating from the processing of lower grade iron ores by froth flotation.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2010.08.057