Optimization of three-dimensional electrochemical process for degradation of methylene blue from aqueous environments using central composite design

2020 ◽  
Vol 18 ◽  
pp. 100711 ◽  
Author(s):  
Reza Shokoohi ◽  
Davood Nematollahi ◽  
Mohammad Reza Samarghandi ◽  
Ghasem Azarian ◽  
Zahra Latifi
Keyword(s):  
Methylene Blue ◽  
Central Composite Design ◽  
Three Dimensional ◽  
Electrochemical Process ◽  
Aqueous Environments ◽  
Central Composite

Which is better for optimizing the biosorption process of lead – central composite design or the Taguchi technique?

2016 ◽  
Vol 74 (6) ◽  
pp. 1446-1456 ◽  
Author(s):  
Ali Azari ◽  
Alireza Mesdaghinia ◽  
Ghader Ghanizadeh ◽  
Hossein Masoumbeigi ◽  
Meghdad Pirsaheb ◽  
...  
Keyword(s):  
Central Composite Design ◽  
Removal Efficiency ◽  
Chemical Engineering ◽  
Three Dimensional ◽  
Taguchi Technique ◽  
Biosorption Process ◽  
Contour Plots ◽  
Face Centered ◽  
Central Composite ◽  
Experimental Runs

The aim of this study is to evaluate central composite design (CCD) and the Taguchi technique in the adsorption process. Contact time, initial concentration, and pH were selected as the variables, and the removal efficiency of Pb was chosen for the designated response. In addition, face-centered CCD and the L9 orthogonal array were used for the experimental design. The result indicated that, at optimum conditions, the removal efficiency of Pb was 80%. However, the value of R2 was greater than 0.95 for both the CCD and Taguchi techniques, which revealed that both techniques were suitable and in conformity with each other. Moreover, the results of analysis of variance and Prob > F < 0.05 showed the appropriate fit of the designated model with the experimental results. The probability of classifying the contributing variables by giving a percentage of the response quantity (Pb removal) made the Taguchi model an appropriate method for examining the effectiveness of different factors. pH was evaluated as the best input factor as it contributed 66.2% of Pb removal. The Taguchi technique was additionally confirmed by three-dimensional contour plots of CCD. Consequently, the Taguchi method with nine experimental runs and easy interaction plots is an appropriate substitute for CCD for several chemical engineering functions.

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