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Cited by 811

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Decolorization of Wastewater

Hao, Oliver J., Kim, Hyunook, Chiang, Pen-Chi·2000·Critical Reviews in Environmental Science and Technology
DOI 10.1080/10643380091184237
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Abstract

The public demand for color-free waste discharge to receiving waters and tougher color standards have made decolorization of a variety of industrial wastes a top priority. Unfortunately, with the complicated color-causing compounds, the decolorization of these wastes is a difficult and challenging task. This article first describes the background information of dye molecules and dye waste characteristics. The methods for color measurements and standards are then discussed. Different techniques including almost all the known physical, chemical and biological techniques are described for decolorization. Each process alone may not be able to meet the requirements. A combination of these processes, for example, chemical-biological, biological-chemical, chemical-physical, chemical-chemical, etc. is often used. The formation of intermediates during the decolorization process is emphasized. These byproducts may be more toxic than the parent compounds. Thus, the extent of the mineralization in waste decolorization should be evaluated.

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Crossref · 10.1080/10643380091184237

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  • Virtually all known physico-chemical and biological techniques have been explored for treatment of extremely recalcitrant dye wastewater, but none has emerged as a panacea.

    “Virtually all the known physico-chemical and biological techniques have been explored for treatment of extremely recalcitrant dye wastewater; none, however, has emerged as a panacea.”

    From Hybrid Treatment Systems for Dye Wastewater (2007) · cites this paper as [79]

  • Stand-alone coagulation/flocculation/precipitation in treating textile/dye waste is relatively ineffective; only 50% removal was achieved using either alum or ferrous sulfate for an azo reactive yellow dye.

    “Their stand alone application in treating textile/dye waste is, however, relatively ineffective 79,101,163 , for example, only 50% removal was achieved using either alum or ferrous sulfate for an azo reactive yellow dye.79”

    From Hybrid Treatment Systems for Dye Wastewater (2007) · cites this paper as [79]

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Metadata

Authors
Hao, O. J., Kim, H., & Chiang, P.-C.
Venue
Critical Reviews in Environmental Science and Technology
Publisher
Informa UK Limited
Published
2000-10
Volume
30
Issue
4
Pages
449-505
ISSN
  • 1064-3389
  • 1547-6537
DOI
10.1080/10643380091184237
Cited by
811
References
0
Language
en

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