Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Adsorption of Lead (II) onto Phosphogypsum from Liquid Effluents
Author(s): Lamzougui G, Nafai H, Chafik D, Bouhaouss A, Bchitou RThe phosphogypsum is an adsorbent which is used to remove heavy metals in aqueous media. The removal of lead by phosphogypsum was studied as a function of the contact time, the adsorbent dose and the adsorbate concentration. Phosphogypsum was prepared by wet process. The adsorption equilibrium of lead in the phosphogypsum is reached after 5 min and the absorption data have worked well at the Freundlich model. The maximum adsorption capacity of phosphogypsum was found to be 12.38 mg.g-1. The Equilibrium isotherms for the adsorption of Pb (II) were analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models. The Freundlich isotherm model was found to represent better the data of Pb (II) sorption onto phosphogypsum. The results showed that the phosphogypsum is a suitable adsorbent for the removal of lead (II) ions from aqueous solutions.
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