Article

Biotechnology Letters

, Volume 26, Issue 4, pp 331-336

Lead biosorption by waste biomass of Corynebacterium glutamicum generated from lysine fermentation process

  • S.B. ChoiAffiliated withDivision of Environmental and Chemical Engineering and Research Institute of Industrial Technology, Chonbuk National University
  • , Y.-S. YunAffiliated withDivision of Environmental and Chemical Engineering and Research Institute of Industrial Technology, Chonbuk National University

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Abstract

Biomass waste, mainly Corynebacterium glutamicum, is generated from large-scale lysine fermentation process. In this study, protonated C. glutamicum biomass was evaluated as a biosorbent for the removal of lead from synthetic wastewater. As Pb2+ were bound to the biomass, the solution pH deceased, indicating that protons in the biomass were exchanged with lead ions. The Corynebacterium biomass bound Pb2+ at up to 2.74 mmol g−1 at pH 5, where lead does not precipitate. Compared with other biosorbents and conventional sorbents, such as natural zeolite, activated carbon and synthetic ion exchange resin, the protonated C. glutamicum biomass was considered to be a useful biomaterial for lead biosorption.

biosorption Corynebacterium glutamicum fermentation wastes lead lysine