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Interactive Optimization of Impressive Parameters Middling in Biological Leaching

Journal of Chemistry and Chemical Engineering 2011年第4期5卷 336-347页

作者： Sirous Nazari Perchestan Mohammad Soleimani Alireza Najafi Aidin Sadeh Sinaki Fahimeh Nemati morteza mohajeri amiri Ali Navabzade Kamran Jafari Mohammad Taghi Moazed Islamic Azad University Ahvaz 6349-68875 Iran Department of Chemical and Petroleum Engineering Sharif University of Technology Tehran 11365-11155 Iran Chemical and Petroleum Engineering School Shiraz University Shiraz 71345 Iran Islamic Azad University Omidiyeh Branch 63731-93719 Iran Islamic Azad University North Tehran Branch 16679-34783Iran Islamic Azad University Karaj Branch 31485-313 Iran

In this study, single and interactive effect of three parameters, pH, ferrous and pulp concentration has been investigated by a 2^3 full factorial CCRD （central composite rotatable design） composed of eight factorial points, six central and six axial points. Initially, ＂none＂ mode from transformation subsection was chosen as the default choice for both responses, i.e. %recovery and gram of recovered zinc. Box-Cox plots give the best Lambda for each response （y^Lambda= f （A, B, C .....）） which occur at 1.91 and 2.16 for %recovey and gram of recovered zinc, respectively. A linear （y^1.91 = f （linear）） and a quadratic （y^2. 16= f （quadratic）） equation were suggested by software as the model for %recovery and gram of recovered zinc, respectively. Analysis of variance （ANOVA） for both models shows a high coefficient of determination （R^2）. In order to optimize and find the best conditions under which three parameters occur appropriately, optimization was done numerically. Desirability plots indicate properly that the best conditions occur at pH = 1.46, ferrous = 6.67 g/L, %pulp = 7.1 （%w/v）, %recovery = 86.5, gram of recovered zinc = 0.63 g and desirability = 0.777. Finally, PRP （progressive route of the process） analysis donates us a proper insight of what is happening during these 30 days. PRP analysis categorizes flasks in two parts, 1- flasks worth economically, 2- flasks with one-time-usable feed materials.

关键词： Central composite rotatable design (CCRD) response surface methodology (RSM) impressive bioleaching parameters optimization progressive route of the process analysis.

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