Effectiveness of Aluminum Chlorohydrate (ACH) for Decolorization of Silk Dyebath Effluents

The present study focuses on the decolorization of real silk dyebath effluents using analytical-grade magnesium chloride (MCl) with and without guar gum (GG) as a coagulant aid and industrial-grade polyaluminium chloride (PACl) and aluminum chlorohydrate (ACH) as coagulants. A higher decolorization...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 51; no. 25; pp. 8646 - 8651
Main Authors Verma, Akshaya K, Bhunia, Puspendu, Dash, Rajesh R
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 27.06.2012
Subjects
Aluminum
Applied sciences
Chemical engineering
Coagulants
Decoloring
Dosage
Dyes
Effluents
Exact sciences and technology
Silk
Sludge
Discoloration
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Summary:The present study focuses on the decolorization of real silk dyebath effluents using analytical-grade magnesium chloride (MCl) with and without guar gum (GG) as a coagulant aid and industrial-grade polyaluminium chloride (PACl) and aluminum chlorohydrate (ACH) as coagulants. A higher decolorization efficiency of 97% at a very high dosage of 1800 mg L–1 was observed for MCl. However, considering the purity, dosage, decolorization efficiency, and quantity and quality of sludge production, ACH was found to be the best coagulant, giving 91% decolorization efficiency at a dose of just 100 mg L–1. To achieve this high degree of decolorization efficiency, the dosage for PACl was found to be approximately 50% higher than that of ACH. Effective decolorization (>90%) at a very low dosage (100 mg L–1) and minimal quantity of sludge production by ACH demonstrate that ACH is an effective coagulant for decolorization of silk dyebath effluents.
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ISSN:0888-5885
1520-5045
DOI:10.1021/ie301201r