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 in:	Industrial & engineering chemistry research 2012-06, Vol.51 (25), p.8646-8651
Main Authors:	Verma, Akshaya K, Bhunia, Puspendu, Dash, Rajesh R
Format:	Article
Language:	eng
Subjects:	Aluminum Applied sciences Chemical engineering Coagulants Decoloring Dosage Dyes Effluents Exact sciences and technology Silk Sludge
Online Access:	Get full text
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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.
ISSN:	0888-5885 1520-5045