Sorption of Cr(VI), Cu(II) and Pb(II) by growing and non-growing cells of a bacterial consortium

P. Sannasi, J. Kader, Ismail Sahid, S. Salmijah

Research output: Contribution to journalArticle

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Abstract

This paper reports the sorption of three metallic ions, namely Cr(VI), Cu(II) and Pb(II) in aqueous solution by a consortium culture (CC) comprising an acclimatised mixed bacterial culture collected from point and non-point sources. Metal sorption capability of growing and non-growing cells at initial pH of between 3 and 8 in the 1-100 mg/L concentration range were studied based on Qmax and Kf values of the Langmuir and linearised Freundlich isotherm models, respectively. Maximal metal loading was generally observed to be dependent on the initial pH. Growing cells displayed significant maximal loading (Qmax) for Pb(II) (238.09 mg/g) and Cu(II) (178.87 mg/g) at pH 6 and at pH 7 for Cr(VI) (90.91 mg/g) compared to non-growing cells (p < 0.05). At the pH range of 6-8, growing cells showed higher loading capacity compared to non-growing cells i.e. 38-52% for Cr, 17-28% for Cu and 3-17% for Pb. At lower metal concentrations and at more acidic pH (3-4) however, non-growing cells had higher metal loading capacity than growing cells. The metal sorption capacity for both populations were as follows: Pb(II) > Cu(II) > Cr(VI).

Original languageEnglish
Pages (from-to)740-747
Number of pages8
JournalBioresource Technology
Volume97
Issue number5
DOIs
Publication statusPublished - Mar 2006

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sorption
Sorption
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Metals
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aqueous solution
metals
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sorption isotherms
Ions
aqueous solutions
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chromium hexavalent ion

Keywords

  • Bacterial consortium
  • Heavy metal
  • Metal loading
  • Sorption

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Food Science
  • Process Chemistry and Technology
  • Applied Microbiology and Biotechnology

Cite this

Sorption of Cr(VI), Cu(II) and Pb(II) by growing and non-growing cells of a bacterial consortium. / Sannasi, P.; Kader, J.; Sahid, Ismail; Salmijah, S.

In: Bioresource Technology, Vol. 97, No. 5, 03.2006, p. 740-747.

Research output: Contribution to journalArticle

Sannasi, P. ; Kader, J. ; Sahid, Ismail ; Salmijah, S. / Sorption of Cr(VI), Cu(II) and Pb(II) by growing and non-growing cells of a bacterial consortium. In: Bioresource Technology. 2006 ; Vol. 97, No. 5. pp. 740-747.
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