Response surface optimization of Cu(II) biosorption onto Candida tropicalis immobilized strontium alginate beads by Box-Behnken experimental design
| Main Authors: | Arunachalam, Thirunavukkarasu, Rajarathinam, Nithya |
|---|---|
| Other Authors: | Vinanie Publishers |
| Format: | Article |
| Terbitan: |
, 2019
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/2619835 |
Daftar Isi:
- A study was conducted to examine the Cu(II) removal from aqueous solution by immobilized Candida tropicalis in strontium alginate beads using three factor, three-level Box-Behnken experimental design in lab-scale batch study. Prior to the statistical analysis, the Candida tropicalis immobilization was performed using strontium chloride and sodium alginate. A second-order polynomial regression equation was developed to predict Cu(II) removal efficiency as the response using three independent variables, Adsorbent dosage (Cads) ranging from 2.0 to 6.0 g/L, initial pH of the solution (pHo) ranging from 2.0 to 6.0 and initial Cu(II) ion concentration (Co) ranging from 250 to 750 mg/L were coded as x1, x2 and x3 at three levels (-1, 0 and 1). At 95 % confidence limits (α = 0.05), the significance of the independent variables and their interactions were examined using Analysis of Variance (ANOVA). By solving the quadratic regression model, the optimum values of the selected variables (Cads = 6.0 g/L, pHo = 5.24 and Co = 530.05 mg/L) were obtained with the maximum Cu(II) removal efficiency of 98.35 % and the results were validated experimentally.