Heavy metals removal by adsorption onto peanut husks carbon: characterization, kinetic study and modeling

• Published in: Separation and purification technology Vol. 24; no. 3; pp. 389 - 401
• Main Authors: Ricordel, S., Taha, S., Cisse, I., Dorange, G.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-09-2001; Elsevier Science
• Subjects: Applied sciences; Characterization; Chemistry; Exact sciences and technology; General and physical chemistry; Heavy metals; Industrial wastewaters; Kinetic adsorption; Modeling; Peanut husks; Pollution; Solid-liquid interface; Surface physical chemistry; Wastewaters; Water treatment and pollution; Characterization; Kinetic adsorption; Modeling; Heavy metals; Peanut husks; Metallic adsorbate; Adsorption isotherm; Cadmium II Ions; Adsorption capacity; Metal ion; Raw materials; Upgrading; Agricultural waste; Rate constant; Divalent metal Ions; Nickel II Ions; Zinc II Ions; Liquid solid adsorption; Reaction order; Vegetal by product; Inorganic adsorbent; Experimental study; Carbon; Lead II Ions; Vegetal waste; Heavy metal; Transition metal Ions; Industrial waste water; Waste reuse; Physicochemical purification; Kinetics; Porosity; Aqueous solution; Surface area; Waste water purification
• ISSN: 1383-5866; 1873-3794
• DOI: 10.1016/S1383-5866(01)00139-3

Carbon prepared from peanut husks (PHC) has been used for the adsorption of Pb
2+, Zn
2+, Ni
2+ and Cd
2+, over a range of initial metal ion concentration (0.15 mM). Chemical and physical characteristics of PHC were determined. The effects of particle size and of carbon doses were evaluated by batch experiments. The kinetics of sorption were followed, based on the amounts of metal sorbed at various time intervals. The modeling of kinetic and isotherm curves has also been investigated. The rate constant and the reaction order have been calculated. The results show that Pb
2+ has best affinity to PHC than Cd
2+, Ni
2+, Zn
2+. From these results an order of the sorption capacity of metal ions sorbed was derived.