Effectiveness of aluminum chlorohydrate (ACH) for decolorization of silk dyebath effluents

Akshaya K. Verma, Puspendu Bhunia, Rajesh R. Dash

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageEnglish
Pages (from-to)8646-8651
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Issue number25
StatePublished - 27 Jun 2012
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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