Journal
WATER RESOURCES AND INDUSTRY
Volume 20, Issue -, Pages 83-92Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.wri.2016.05.001
Keywords
Heavy metal; Biosorption; Aspergillus Sp.; Optimization; Taguchi design
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In the present study, the process parameters affecting biosorption were optimized by adopting Analysis of Mean (ANOM) approach for maximizing the percentage removal of copper and nickel by growing Aspergillus sp. in batch reactor using Taguchi method. The process parameters include inoculum concentration, initial metal concentration, pH and temperature. The optimized conditions were found to be 15% v/v inoculum concentration, 50 mg l(-1) concentration of copper/nickel, pH 4 and temperature 30 degrees C. The percentage contribution of each process parameter on the removal of copper/nickel determined using Analysis of Variance (ANOVA) method followed the order: concentration of copper/nickel>inoculum concentration>pH>temperature. The percentage removal of copper and nickel realized in the confirmatory experiments carried out at optimized conditions was found to be higher than that obtained in all the test runs of Taguchi design, thereby supporting the accuracy of optimization of process parameters under the given set of experimental conditions. (C) 2018 Published by Elsevier B.V.
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