Journal
JOURNAL OF CHEMOMETRICS
Volume 27, Issue 1-2, Pages 12-20Publisher
WILEY
DOI: 10.1002/cem.2487
Keywords
BoxBehnken design (BD); central composite design (CCD); Doehlert matrix (DM); response surface methodology; Pb(II) removal
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A comparative study of BoxBehnken, central composite, and Doehlert matrix was performed on the adsorption of Pb (II) by Robinia tree leaves in a batch system. As a case study, uptake capacity (q) and removal efficiency (R) of Pb (II) biosorption have been evaluated with all theses approaches. The advantages and limitations of these different response surface techniques have been experimentally considered. The results show the different statistical predictability of Doehlert matrix and BoxBehnken design at 95% confidence level comparable with some extent with that of central composite design at some extreme conditions. An environmental and economical comparison was also carried out between individual and simultaneous optimization of removal efficiency (R) and uptake capacity (q) using desirability function. Optimization of q proves only to have advantages over R or simultaneous optimization of R and q in this particular biosorption process. Copyright (c) 2013 John Wiley & Sons, Ltd.
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