Biosorption and desorption of Nickel on oil cake: Batch and column studies

• Published in: Bioresource technology Vol. 103; no. 1; pp. 35 - 42
• Main Authors: Khan, Moonis Ali, Ngabura, Mohammad, Choong, Thomas S.Y., Masood, Hassan, Chuah, Luqman Abdullah
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-01-2012; Elsevier
• Subjects: activation energy; Adsorption; Batch Cell Culture Techniques - methods; batch systems; Biodegradation, Environmental; Biological and medical sciences; Biomass; Biotechnology; Breakthrough capacity; Cakes; Contact; Desorption; Endothermic reactions; Fundamental and applied biological sciences. Psychology; Hydrogen-Ion Concentration; Kinetics; mustard oil cake; Mustard Plant - chemistry; Nickel; Nickel - isolation & purification; Nonlinear Dynamics; Nonlinearity; Plant Oils - chemistry; Regeneration; spectroscopy; Spontaneous; Temperature; Thermodynamics; Time Factors; Waste Products - analysis; Breakthrough capacity; Thermodynamics; Regeneration; Desorption; Kinetics; Biosorption; Nickel; Oilseed cake
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2011.09.065

► Due to lower C/N ratio MOC could be considered as an ecofriendly biosorbent. ► Acidic functionalities were actively involved in biosorption. ► Column desorption studies revealed that it could be utilized for Ni(II) preconcentration. ► 100% Ni(II) recovery in single-metal system with acid was observed by batch process. ► For regeneration no significant loss in biosorption was observed for seven consecutive cycles.
Biosorption potential of mustard oil cake (MOC) for Ni(II) from aqueous medium was studied. Spectroscopic studies showed possible involvement of acidic (hydroxyl, carbonyl and carboxyl) groups in biosorption. Optimum biosorption was observed at pH 8. Contact time, reaction temperature, biosorbent dose and adsorbate concentration showed significant influence. Linear and non-linear isotherms comparison suggests applicability of Temkin model at 303 and 313K and Freundlich model at 323K. Kinetics studies revealed applicability of Pseudo-second-order model. The process was endothermic and spontaneous. Freundlich constant (n) and activation energy (Ea) values confirm physical nature of the process. The breakthrough and exhaustive capacities for 5mg/L initial Ni(II) concentration were 0.25 and 4.5mg/g, while for 10mg/L initial Ni(II) concentration were 4.5 and 9.5mg/g, respectively. Batch desorption studies showed maximum Ni(II) recovery in acidic medium. Regeneration studies by batch and column process confirmed reutilization of biomass without appreciable loss in biosorption.