African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5210

Full Length Research Paper

Regulation of the ambient conditions for improving heavy metals removal from tanning leather industry waste water by Aspergillus candidus

  Eman Fathi Sharaf* and Eman Alharbi
Department of Biology, Faculty of Science, Taibah University, AL-Madinah  AL- Munawarah, Kingdom of Saudi Arabia.
Email: [email protected]

  •  Accepted: 26 August 2013
  •  Published: 06 September 2013



In the present study, the whole fungal mycelia of Aspergillus candidus, showed the highest capacity for the removal of heavy metals: Pb+2, Cu+2, Fe+3, Mn+2, Cr+6 and Sr+2from wastewater effluent of tanning leather industry, compared with the fungal pellets. Maximum biosorption capacity of metals was obtained after using 6 days old biomass and when the process was carried out at 28°C. Heavy metals sorption was observed at a wide pH range of the wastewater and particularly increased at slight acidic condition (pH 6) for sorption of Pb+2 and Cu+2. However, sorption of Fe+3, Mn+2, Cr+6 and Sr+2was stimulated after adjusting the pH of the waste water at the alkaline conditions (pH 8 for Fe3+ and Mn2+, and 10 for Cr6+ and Sr2+), specially for the last two metals. The results confirm that, the dead biomass of A. candidus offered a great potential as abiosorbent over the living one.


Key words: Effluent, Aspergillus candidus, biosorption, pH, heavy metals, dead biomass.