Toxic heavy metals removal from river water using a porous phospho-calcic hydroxyapatite
| Autor: | K. Azzaoui, B. Hammouti |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.48317/imist.prsm/morjchem-v10i1.31752 |
| Popis: | The process of adsorption of copper ions on synthesized hydroxyapatites (p-HAp) by the wet route has been studied experimentally to make a comparison between the adsorption capacity of our porous phospho-calcic material and the phosphate hydroxyapatite. The specific surface of p-HAp was studied by BET, as well as the characterization of p-HAp by FTIR and XRD showed that the synthetic hydroxyapatite has an apatite phase of crystalline structure which is very interesting for the adsorption of metals. Heavy, the results of the adsorption study obtained that the mechanism of adsorption of Cu2+ ions was best described by the pseudo-second-order kinetic model and obeyed the linear models of Langmuir isotherms, continued that the adsorption is done in the surface area of p-HAp. Langmuir model parameters reveal that, the adsorption mechanism of Cu2+ is fit with this model. The pseudo-first-order and pseudo-second-order models were also used to determine the adsorption kinetic. The experimental data were well fitted by the pseudo-second-order model. Thermodynamic parameters showed that, the adsorption of Cu2+ ion onto the composite surface is a spontaneous and favored at neutral pH and at a temperature little higher than room temperature. Moroccan Journal of Chemistry, Vol. 10, No 1 (2022): in progress |
| Databáze: | OpenAIRE |
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