Which is better for optimizing the biosorption process of lead - central composite design or the Taguchi technique?
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 L9orthogonal 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 R2was 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.
Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran E-mail: kio.sharafi@gmail.com; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Ali
A
Azari
Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Alireza
A
Mesdaghinia
Health Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
Ghader
G
Ghanizadeh
Health Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran.
Hossein
H
Masoumbeigi
Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran E-mail: kio.sharafi@gmail.com.
Meghdad
M
Pirsaheb
Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
Hamid Reza
HR
Ghafari
Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran E-mail: kio.sharafi@gmail.com.
Touba
T
Khosravi
Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of Medical Sciences, Kermanshah, Iran E-mail: kio.sharafi@gmail.com; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Kiomars
K
Sharafi
D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000737:chemistry*; D008962:Models, Theoretical; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D014874:Water Pollutants, Chemical; D007854:Lead