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Water, Air, & Soil Pollution

, Volume 214, Issue 1–4, pp 185–195 | Cite as

Optimization of the Adsorption Conditions for the Decolorization and COD Reduction of Methylene Blue Aqueous Solution using Low-Cost Adsorbent

  • Ling Wei Low
  • Tjoon Tow Teng
  • Abbas F. M. AlkarkhiEmail author
  • Anees Ahmad
  • Norhashimah Morad
Article

Abstract

The performance of raw bagasse (RB), and tartaric acid-modified bagasse (TAMB) as adsorbents on decolorization and chemical oxygen demand (COD) reduction of methylene blue (MB) aqueous solution was studied. The effects of five factors namely: adsorbent dosage, pH, shaking speed, contact time, and temperature on decolorization and COD reduction were studied and optimized using central composite design (CCD). The results of the analysis show that all selected factors exhibit significant effect on decolorization and COD reduction. Maximum decolorization (78.16%) and COD reduction (77.95%) for RB was achieved at 0.82 g of adsorbent dosage, pH 9.4, 122 rpm of shaking speed, 44 min of contact time, and 55°C. For TAMB, maximum decolorization (99.05%) and COD reduction (98.45%) was achieved at 0.78 g adsorbent dosage, pH 9.4, shaking speed of 120 rpm, 34 min contact time, and 49°C. TAMB was found to be more effective than RB in decolorization and COD reduction of MB aqueous solution.

Keywords

Response surface methodology Decolorization Chemical oxygen demand Tartaric acid-modified bagasse Central composite design 

Notes

Acknowledgments

The authors acknowledge the research grant provided by the Malayan Sugar Manufacturing Company under Kuok Foundation Berhad and the research facilities of Universiti Sains Malaysia (USM).

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Ling Wei Low
    • 1
  • Tjoon Tow Teng
    • 1
  • Abbas F. M. Alkarkhi
    • 1
    Email author
  • Anees Ahmad
    • 1
  • Norhashimah Morad
    • 1
  1. 1.School of Industrial TechnologyUniversiti Sains MalaysiaPenangMalaysia

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