Journal
BIOCHEMICAL ENGINEERING JOURNAL
Volume 84, Issue -, Pages 83-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bej.2014.01.004
Keywords
Biosorption; Immobilized cell; Batch processing; Modeling; Artificial neural network; Cadmium ions
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Artificial neural network (ANN) model was applied for predicting the biosorption capacity of immobilized Bacillus subtilis beads (IBSB) for cadmium ions from aqueous solution. The effect of pH, contact time, biosorbent dosage, temperature and initial cadmium ions concentration was investigated. The equilibrium biosorption capacity of IBSB was found to be 251.91 mg/g at optimum pH of 5.91, temperature of 45 degrees C and equilibrium time of 3 h for an initial concentration of 496.23 mg/L. The interaction between the biosorbent and cadmium ions was confirmed using FTIR and SEM analysis. The experimental results were simulated using ANN model. Levenberg Marquardt algorithm was used for the training of this network with hyperbolic tangent sigmoid as transfer function. The applied model successfully predicted cadmium biosorption capacity with determination coefficient of 0.997. IBSB can be successfully regenerated using 0.1 M HCl for subsequent cycle use. (C) 2014 Elsevier B.V. All rights reserved.
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