Kinetics, Thermodynamics, and Mechanism of Cu(II) Ion Sorption by Biogenic Iron Precipitate: Using the Lens of Wastewater Treatment to Diagnose a Typical Biohydrometallurgical Problem
Babatunde Oladipo, Elaine Govender-Opitz, Tunde V. Ojumu
Abstract
° (20.07-23.81 kJ/mol) indicated that the adsorption process was chemically favored, nonspontaneous, and endothermic, respectively. The 43% Cu(II) removal within 60 min equilibrium contact time at pH 5 was indicative of the reduced efficiency of copper extraction observed in a real-life biohydrometallurgical process due to sorption by the iron precipitate. The result of this study might provide an insight into the management of the biohydrometallurgical process to minimize copper losses. It may also help mitigate environmental pollution caused by the disposal of these biogenic iron precipitate residues.
Topics & Concepts
SorptionAdsorptionChemistryEndothermic processFreundlich equationCopperLangmuirChemisorptionAqueous solutionInorganic chemistryIonic radiusKineticsBET theoryIonPhysical chemistryQuantum mechanicsOrganic chemistryPhysicsAdsorption and biosorption for pollutant removalExtraction and Separation ProcessesMetal Extraction and Bioleaching