Application of response surface analysis for optimization of dyes sorption onto EDTA modified rice hull

Siew-Teng Ong*, Weng Nam Lee, Pei-Sin Keng, Siew Ling Lee, Yiing-Tse Hung, Sie-Tiong Ha

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)


    The batch removal of basic and reactive dyes from aqueous solution using ethylenediamine tetraacetic acid modified rice husk (ERH) was studied. Plackett-Burman design coupled with response surface methodology (11SM) were adopted to evaluate the effect of various operating parameters, such aspH (2-10), contact time (5-420 mins) andsorbent dosage (0.05-0.2 g) on the percentage of dye removal. The optimum adsorption conditions for Methylene Blue were determined as pH: 8.6, contact time: 131 mins and sorbent dosage: 0.13 g. As for Reactive Orange 16, a greater uptake was observed at a lower pH. The empirical model developed from the interactive effects of important operating variables was validated using ANOVA analysis. The percentage uptakes predicted by the model are in good agreement with the experimental values, thus confirming the reliabilily of the models.

    Original languageEnglish
    Pages (from-to)538-543
    Number of pages6
    JournalResearch Journal of Chemistry and Environment
    Issue number2
    Publication statusPublished - Jun 2011


    • Adsorption
    • Basic dyes
    • Optimization
    • Plackett-Burman design
    • Reactive dyes
    • Response surface methodology (RSM)

    ASJC Scopus subject areas

    • Biochemistry
    • General Chemistry
    • General Chemical Engineering
    • Renewable Energy, Sustainability and the Environment
    • General Environmental Science
    • General Agricultural and Biological Sciences
    • General Earth and Planetary Sciences


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