This study introduces Fraxinus tree leaves as a new, efficient biosorbent of As(III). A suitable ... more This study introduces Fraxinus tree leaves as a new, efficient biosorbent of As(III). A suitable response surface was achieved by running a central composite design. Simultaneous optimization of both responses (R% and q) was carried out and 67% of the goal of desirability function was attained. The results obtained for simultaneous optimization are R = 70% and q = 80.6 mg g−1 with 67% desirability in m = 600 mg L−1 where s = 0.10 g and pH = 3.9. Langmuir and Freundlich isotherms model were applied in explaining the sorbent–sorbate equilibrium study, and maximum capacity uptake equals 99.97 mg g−1 and KL = 0.05 L mg−1 has been obtained. Fourier Transfer Infra-Red (FT-IR) and kinetic results were considered to examine the functional groups involved and the adsorption mechanism.
Ulmus tree leaves were successfully used as a novel and efficient biosorbent for removing cadmium... more Ulmus tree leaves were successfully used as a novel and efficient biosorbent for removing cadmium, (Cd(II)), from aqueous solutions in a batch system. A multivariate strategy for optimization of removal efficiency conditions of Cd(II) was carried out. A 2 full factorial design with three center points (9 runs) was performed for screening the main variables and reducing the large number
... Zolgharnein* and Ali Shahmoradi. Department of Chemistry, Faculty of Science, Arak University... more ... Zolgharnein* and Ali Shahmoradi. Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran. J. Chem. Eng. ... Table 6. Analysis of Variance (ANOVA) for the Suggested Model a. source, DF, SS, MS, F, P. regression, 7, 6046.48, 863.78, 121.33, < 0.0001 ...
Pb (II) by Robinia tree leaves in a batch system. As a case study, uptake capacity (q) and remova... more 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 Box–Behnken 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.
This study introduces Fraxinus tree leaves as a new, efficient biosorbent of As(III). A suitable ... more This study introduces Fraxinus tree leaves as a new, efficient biosorbent of As(III). A suitable response surface was achieved by running a central composite design. Simultaneous optimization of both responses (R% and q) was carried out and 67% of the goal of desirability function was attained. The results obtained for simultaneous optimization are R = 70% and q = 80.6 mg g−1 with 67% desirability in m = 600 mg L−1 where s = 0.10 g and pH = 3.9. Langmuir and Freundlich isotherms model were applied in explaining the sorbent–sorbate equilibrium study, and maximum capacity uptake equals 99.97 mg g−1 and KL = 0.05 L mg−1 has been obtained. Fourier Transfer Infra-Red (FT-IR) and kinetic results were considered to examine the functional groups involved and the adsorption mechanism.
Ulmus tree leaves were successfully used as a novel and efficient biosorbent for removing cadmium... more Ulmus tree leaves were successfully used as a novel and efficient biosorbent for removing cadmium, (Cd(II)), from aqueous solutions in a batch system. A multivariate strategy for optimization of removal efficiency conditions of Cd(II) was carried out. A 2 full factorial design with three center points (9 runs) was performed for screening the main variables and reducing the large number
... Zolgharnein* and Ali Shahmoradi. Department of Chemistry, Faculty of Science, Arak University... more ... Zolgharnein* and Ali Shahmoradi. Department of Chemistry, Faculty of Science, Arak University, Arak 38156-8-8349, Iran. J. Chem. Eng. ... Table 6. Analysis of Variance (ANOVA) for the Suggested Model a. source, DF, SS, MS, F, P. regression, 7, 6046.48, 863.78, 121.33, < 0.0001 ...
Pb (II) by Robinia tree leaves in a batch system. As a case study, uptake capacity (q) and remova... more 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 Box–Behnken 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.
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