Title: Treatment of reactive dyes and textile finishing wastewater using Fenton's oxidation for reuse

Authors: Sureyya Meric, Giusy Lofrano, Vincenzo Belgiorno

Addresses: Department of Civil Engineering, University of Salerno, Fisciano 84084 (SA), Italy. ' Department of Civil Engineering, University of Salerno, Fisciano 84084 (SA), Italy. ' Department of Civil Engineering, University of Salerno, Fisciano 84084 (SA), Italy

Abstract: Fenton|s oxidation (FO) was used to decolourise and degrade some reactive dyes (Remazol Black 5, Remazol Red, Remazol Blue, Remazol Yellow) and raw textile finishing industry effluents (S1, S2, S3) containing mainly reactive dyes. The operational conditions for pH varied between 2.5 and 4.0 while temperature ranged from 30°C to 50°C. The concentrations of FeSO₄ and H₂O₂ varied to a wide range (200–600 mg/l of FeSO₄, 300–1000 mg/l of H₂O₂) depending on the type of the dyes and their mixture and textile additives used in the process. FO is highly effective for colour removal (>99%) for reactive dyes and (87–94%) for textile finishing wastewater. It can be applied as a pretreatment and the remaining total dissolved solids (TDS) can be removed by an additional advanced process, e.g. membrane process.

Keywords: textile finishing; wastewater treatment; reactive dyes; Fenton|s oxidation; operational parameters; COD; colour removal; reuse; dye treatment.

DOI: 10.1504/IJEP.2005.006865

International Journal of Environment and Pollution, 2005 Vol.23 No.3, pp.248 - 258

Published online: 19 Apr 2005 *

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