Physicochemical characterization and Bioremediation perspective of textile effluent, dyes and metals by indigenous Bacteria

J Hazard Mater. 2009 May 15;164(1):322-8. doi: 10.1016/j.jhazmat.2008.08.006. Epub 2008 Aug 13.

Abstract

Physicochemical and bacteriological status of a local textile mill effluent showed considerably high values of temperature (40 degrees C), pH (9.50), EC (3.57mus/m), BOD (548mgl(-1)), COD (1632mgl(-1)), TSS (5496mgl(-1)), TDS (2512mgl(-1)), heavy metals ions (0.28-6.36mgl(-1)) and color above the prescribed fresh water limits. However, a considerable decline in almost all pollution indicators from source to sink indicated signs of natural remediation. Ten bacteria strains isolated from effluent showed comparatively higher resistance (MRL) (mgl(-1)) (average) for 10 heavy metals than against four structurally different dyes tested on solid media of mineral salt. Overall bacterial resistance was quite high against Fe(3+) (2820), Cr(3+) (1203), Zn(2+) (1122), Mn(2+) (804) and Pb(2+) (435), whereas, it varied amid 300-500 in four dyes. Bacterial decolorization/degradation of dyes indicated on solid media was confirmed through experiments carried out in liquid broth.

MeSH terms

  • Anaerobiosis
  • Bacteria / metabolism
  • Biodegradation, Environmental
  • Bioreactors
  • Coloring Agents / chemistry*
  • Coloring Agents / isolation & purification
  • Industrial Waste*
  • Metals, Heavy / chemistry*
  • Metals, Heavy / isolation & purification
  • Textile Industry*
  • Waste Disposal, Fluid
  • Water Pollutants, Chemical / chemistry*
  • Water Pollutants, Chemical / isolation & purification

Substances

  • Coloring Agents
  • Industrial Waste
  • Metals, Heavy
  • Water Pollutants, Chemical