Reactive-disperse mixed dye wastewater treatment using advanced oxidation process

Joanne C.L. Lim, Khai Ern Lee

Research output: Contribution to journalArticle

Abstract

This paper studied the efficiency of another series of advanced oxidation processes involving the use of a chelating ligand, combined with a transition metal forming the transition metal complexes to produce reactive radicals. Previous reports using this H2O2/pyridine/Cu(II) system focused only on the decolorization of a single synthetic dye wastewater. In practice, real dye wastes contain mixture of dyes. Therefore, in this study, we combined two classes of most widely used dyes namely the reactive dye (RD) and disperse dye (DD) in three different ratios of (RD: DD) = (0.25:0.75), (0.50:0.50), and (0.75:0.25) to obtain a better idea of the trend in the treatment efficiency of this system. Experimental results are assessed in terms of percentage chemical oxygen demand (COD) reduction, decolourisation, and the amount of sludge produced. Optimal concentrations were obtained using statistical design of experiment. At optimal concentrations, for (RD:DD) = (0.25:0.75), (0.50:0.50), and (0.75:0.25), the percentage of COD reduction was recorded at 87%, 86% and 81%, respectively, decolourization at 97%, 98% and 96%, respectively while sludge produced was 185 mg/L, 125 mg/L, and 210 mg/L, respectively.

Original languageEnglish
Pages (from-to)45-54
Number of pages10
JournalNature Environment and Pollution Technology
Volume16
Issue number1
Publication statusPublished - 2017

Fingerprint

Wastewater treatment
dye
Dyes
oxidation
Oxidation
Chemical oxygen demand
transition element
chemical oxygen demand
Transition metals
sludge
wastewater treatment
Metal forming
Metal complexes
Chelation
Pyridine
Design of experiments
ligand
Wastewater
Ligands
wastewater

Keywords

  • Advanced oxidation
  • Chelating ligand
  • Mixed dye wastewater
  • Transition metal complex

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)

Cite this

Reactive-disperse mixed dye wastewater treatment using advanced oxidation process. / Lim, Joanne C.L.; Lee, Khai Ern.

In: Nature Environment and Pollution Technology, Vol. 16, No. 1, 2017, p. 45-54.

Research output: Contribution to journalArticle

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