Optimization studies on Biosorption of Copper (II) by Crab Shell Using Response Surface Methodology(RSM)

• Main Authors: s, Sudesh, M, Meenakshi, R.Y., Sheeja, T., Murugesan
• Format: Article
• Published: The Berkeley Electronic Press 2010
• Subjects: TP Chemical technology
• Online Access: http://eprints.utp.edu.my/930/1/CPPM_vol_5_issue_1_article_5.pdf; http://eprints.utp.edu.my/930/

In the present work, crab shell was used as the biosorbent to remove copper from aqueous solution. Batch experiments were performed at different initial copper concentration of copper solutions (1-40 g/l), initial pH (2-9), temperature (20-400C), and biosorbent dosages (2-10 g/l). The maximum removal of copper using crab shell occurred at a pH of 3 and at a temperature of 400C using an optimum biosorbent dosage of 5 g/l. A mathematical model was proposed to identify the effects of the individual interactions of these variables on the biosorption of copper. The results have been modeled using response surface methodology using a Box-Behnken design. The response surface method was developed using three levels (-1, 0, +1) with the above mentioned four factors. The second order quadratic regression model fitted the experimental data with Prob > F to be < 0.0001. The experimental values were found to be in good agreement with the predicted values, with a satisfactory correlation coefficient of R2 = 0.9999.