Single and binary adsorption of some heavy metal ions from aqueous solutions by activated carbon derived from olive stones

Abstract

A B S T R A C TIn the present work, activated carbon synthesized from olive stones was used for heavy metal ions (Cu(II), Ni(II), and Pb(II)) removal in single and binary aqueous solutions. The effect of initial solution pH was studied. The equilibrium isotherms for single systems were evaluated in terms of maximum adsorption capacity and adsorption affinity by the application of Langmuir model. Metal ions adsorption increases in the following order: Pb(II) > Ni (II) ≥ Cu(II). The examination of binary adsorption systems: Cu-Ni and Cu-Pb shows that the affinity of copper on the activated carbon surface was strongly dependent on initial concentration of nickel and lead. Copper adsorption was found to increase in the presence of nickel and to decrease in the presence of lead.

Adsorption of 4-Nitrophenol (PNP) Using Pilli Nut Shell Active Carbon

“…This confirms that the adsorption of 4-nitrophenol is favourable on both active carbons. Similar results have been obtained by several authors for the adsorption of PNP and phenol using various adsorbents [23,31,32]. From the slope and intercept of the linear plots of ln q e versus ln C e ; (Fig.…”

“…Moreover, k id value of 3.2479 mg/g min 1/2 has been obtained in the adsorption of phenol using active carbon from olive stones [32]. …”

“…The movement of solute molecules on to solid surface particulates from the aqueous phase, and then diffusion of the solute molecules into the pore interiors [37] could be described by the intraparticle diffusion rate equation and is given as [32]:…”

Copper supported on porous activated carbon obtained by wetness impregnation: Effect of preparation conditions on the ozonation catalyst's characteristics

“…When 1/n is small, the adsorption affinity increases [40], whereas the surface heterogeneity is enhanced in the case of high values of 1/n [41].…”

Design analysis of fixed-bed synergic adsorption of heavy metals and acid blue 25 on activated carbon

“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13] www.deswater.com doi: 10.1080/19443994.2015.1031710 a wide variety of low-cost precursors and its adsorption properties can be tailored to remove a specific pollutant [1][2][3].…”