Mexerica mandarin (Citrus nobilis) peel as a new biosorbent to remove Cu(II), Cd(II), and Pb(II) from industrial effluent

Inagaki, Camila Suemi; de Oliveira Caretta, Talita; da Silva Alfaya, Rení Ventura; Da Silva Alfaya, Antonio Alberto
August 2013
Desalination & Water Treatment;Aug2013, Vol. 51 Issue 28-30, p5537
Academic Journal
Adsorption experiments were carried out using waste Mexerica mandarin "Citrus nobilis" peel as a new biosorbent to adsorb Cu(II), Cd(II), and Pb(II) ions from aqueous solutions at room temperature. To achieve the best adsorption conditions, the influences of pH and contact time were investigated. The isotherms of adsorption were fitted to the Langmuir and Freundlich equations. Based on the experimental data the adsorption order was Pb(II)>Cd(II) >Cu(II) (in mgg-1) on the new biosorbent. This quick adsorption process reached the equilibrium before 20 min, with maximum adsorptions at pH 5.0. Kinetic studies were carried out using the pseudo-first-order and pseudo-second-order models. Thermodynamic aspects of the adsorption process were investigated. The new biosorbent was used in columns for the removal of Cu, Cd, and Pb ions of the samples of industrial effluent and its efficiency and regeneration potential were studied.


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