A membrane electroflotation process for recovery of recyclable chromium(III) from tannery spent liquor effluent

Rajeswari Selvaraj, Manikandan Santhanam, Vidhya Selvamani, Sundarapandiyan Sundaramoorthy, Maruthamuthu Sundaram

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A two-compartment membrane electroflotation reactor has been demonstrated for recovery of recyclable chromium(III) from tannery spent liquor effluent. Dimensionally stable RuO 2 /TiO 2 -Ti and Ti were used as anode and cathode, respectively. The spent liquor effluent was used as catholyte and 0.01 N H 2 SO 4 used as anolyte which was separated by Nafion 117 membrane. About 98% of chromium(III) was recovered and the removal efficiency correlated with the presence of organics in the effluent. The advantage of two-compartment membrane electroflotation process is capable of removing chromium(III) without oxidising it into chromium(VI) in chloride containing tannery spent liquor effluent. The mechanism of chromium(III) removal has been discussed. The recovered Cr(OH) 3 was successfully demonstrated for tanning of cowhide.

Original languageEnglish
Pages (from-to)133-139
Number of pages7
JournalJournal of Hazardous Materials
Volume346
DOIs
StatePublished - 15 Mar 2018
Externally publishedYes

Keywords

  • Chromium(III)
  • Electroflotation
  • Recovery
  • Reuse
  • Tannery effluent

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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