Application of central composite design for optimization of the removal of humic substances using coconut copra

Terri Zhuan, Ean Lee and Chanida, Krongchai and Nurul Aida Lu, Bt Mohd Irwan Lu and Sila, Kittiwachana and Siong, Fong Sim (2015) Application of central composite design for optimization of the removal of humic substances using coconut copra. International Journal of Industrial Chemistry, 6 (3). pp. 185-191. ISSN 2228-5547

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Abstract

Coconut copra is a potential biosorbent for removal of humic substances from peat swamp runoff. In this paper, response surface methodology was applied to evaluate the optimum conditions for removal of humic substances from peat swamp runoff using modified coconut copra. Batch adsorption experiments were conducted according to central composite design. Results show that the quadratic model is best fitted for predicting the removal efficiency with regression coefficients closer to 1 and a lower root mean square error. Dosage is found to have significant influence on the removal efficiency with p < 0.05. Response surface models further identified the optimum dosage, contact time and temperature at 4.56 g modified coconut copra per 100 mL peat swamp runoff, 42.9 min and 56.8 °C/329°K, respectively attaining the maximum removal efficiency of 88.19 %. The predicted removal efficiency was confirmed experimentally under the modelled optimum conditions; the removal efficiency attained (86.54 %) was in good agreement with the predicted value.

Item Type: Article
Uncontrolled Keywords: Biosorbent, Coconut copra, Central composite design, Humic substances, Response surface methodology, research, Universiti Malaysia Sarawak, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education
Subjects: Q Science > QD Chemistry
S Agriculture > SB Plant culture
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Karen Kornalius
Date Deposited: 25 Jan 2016 07:24
Last Modified: 21 Oct 2016 01:21
URI: http://ir.unimas.my/id/eprint/10314

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