Lead (II) Removal from Aqueous Solution by Spent Agaricus bisporus: Determination of Optimum Process Condition Using Taguchi Method
In this paper, Taguchi method was applied to determine the optimum condition for Pb (II) removal from aqueous solution by spent Agaricus bisporus. An orthogonal array experiment design (L9(34) which is of four control factors (pH, t (contact time), m (sorbent mass), and C 0 (initial Pb (II) concentration)) having three levels was employed. Biosorption capacity (mg metal/g biosorbent) and percent removal (%) were investigated as the quality characteristics to be optimized. In order to determine the optimum levels of the control factors precisely, range analysis and analysis of variance were performed. The optimum condition for biosorption capacity was found to be pH = 5.00, t = 5.0 h, m = 0.010 g, and C 0 = 50 mg/L. And for percent removal, the optimum condition was found to be pH = 4.00, t = 4.0 h, m = 0.100 g, and C 0 = 50 mg/L. Under these optimum conditions, biosorption capacity and percent removal can reach 60.76 mg/g and 80.50%, respectively.
KeywordsBiosorption Agaricus bisporus Taguchi method Optimization Lead (II)
The authors acknowledge financial support from the National High Technology Research and Development Program of China (863 Program), Project No. 2006AA06Z361 and thank Professor Guanglei Cheng for his technical assistance. Besides Xiaoqiang Zhu, Shiyu Zhou and Shouting Chen had provided experiment help.
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