International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2573

Full Length Research Paper

Optimization of basic and reactive dye uptakes in binary dye solution using statistical experimental methodology

Siew-Teng Ong1*, Weng-Nam Lee2, Pei-Sin Keng3, Siew-Ling Lee4 and Yung-Tse Hung5
1Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman,Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia. 2Department of Science, Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Genting Kelang, Setapak 53300 Kuala Lumpur, Malaysia. 3Department of Pharmaceutical Chemistry, International Medical University, No.126, Jalan 19/155B, Bukit Jalil, 57000 Kuala Lumpur, Malaysia. 4Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 Skudai, Johor Malaysia. 5Department of Civil and Environmental Engineering, Cleveland State University, Cleveland, Ohio USA.
Email: [email protected], [email protected]

  •  Published: 04 November 2010

Abstract

In the present study, the optimum adsorption conditions for the uptake of methylene blue (MB) and reactive orange 16 (RO16) in binary dye solution by ethylenediamine tetraacidic acid (EDTA) modified rice hulls was studied. By using the Plackett-Burman design, the significant variables in affecting the MB and RO16 uptake in binary dye solution were identified as pH and contact time. The combined effects of interaction between the variables were determined using response surface methodology (RSM). The model predicted that at optimum conditions: pH 6.77 and contact time of 205.58 min, the MB uptake greater than 95% could be obtained. As for RO16, the RSM indicated that pH 3.17 and contact time of 205.59 min were optimal for maximum percent dye uptake. These predicted values were also experimentally validated to confirm the reliability of the models.

 

Key words: EDTA modified rice hulls, methylene blue, reactive orange 16, plackett burman, response surface methodology, optimization.