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Effect of pH on Pb2+ accumulation in Saccharomyces cerevisiae and Aureobasidium pullulans

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Abstract

The optimum pH conditions of Pb2+ accumulation in Saccharomyces cerevisiae and Aureobasidium pullulans were 4∼5 and 6∼7, respectively. The initial Pb2+ accumulation rates according to the increase of initial Pb2+ concentration and pH were increased both in S. cerevisie and A. pullulans. And the initial Pb2+ accumulation rate of A. pullulans was much higher than that of S. cerevisiae because of the difference of Pb2+ accumulation mechanism. The Pb2+ accumulation isotherm of S. cerevisae obeyed a fully competitive inhibition, whereas that of A. pullulans showed a mixed inhibition of competition and non-competition associated with the proton (H+) as an accumulation inhibitor.

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Authors and Affiliations

  1. Department of Industrial Chemistry, Ulsan Junior College, Ulsan 680-749, , , , ,

    J. H. Suh

  2. Department of Biotechnology, Taegu University, Kyungbuk 712-714, Korea, , , , , , KR

    J. W. Yun

  3. Department of Environmental Science, Catholic University of Taegu-Hyosung, Kyungbuk 712-702, Korea e-mail: kimds@cuth.cataegu.ac.kr, , , , , , KR

    D. S. Kim

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  1. J. H. Suh
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  2. J. W. Yun
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  3. D. S. Kim
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Received: 29 June 1998

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Suh, J., Yun, J. & Kim, D. Effect of pH on Pb2+ accumulation in Saccharomyces cerevisiae and Aureobasidium pullulans . Bioprocess Engineering 20, 471–474 (1999). https://doi.org/10.1007/PL00009056

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  • DOI: https://doi.org/10.1007/PL00009056

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