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Characterization of cadmium removal by Rhodotorula sp. Y11

  • Applied Microbial and Cell Physiology
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Abstract

Experiments were conducted studying the removal of Cd2+ from water via biosorption using Rhodotorula sp. Y11. The effects of temperature and initial pH of the solution on biosorption were studied. Caustic and heat treatments showed different influences on the biosorption capacity, and the highest metal uptake value (19.38 mg g−1) was obtained by boiling treated yeast cells. The presence of competing cations, such as Ag+, Cu2+, and Mg2+, except Na+ ions, significantly interfered with the metal uptake. Results indicate that the Langmuir model gave a better fit to the experimental data than the Freundlich equation. The q 10 value was 11.38 mg g−1 for Cd2+ uptake by Y11. Chemical modifications of the biomass demonstrated that carboxyl and amide groups play an important role in Cd2+ biosorption.

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Acknowledgements

This study was financially supported by the Major State Basic Research Development Program: Study on the Environmental Pollution Mechanisms and Control Principles in Beijing and Surrounding Area (G1999045709).

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Authors and Affiliations

  1. College of Biological Sciences, Key Laboratory of Agro-Microbial Resource and Application, Ministry of Agriculture, China Agricultural University, Beijing, 100094, People’s Republic of China

    Zhijian Li & Hongli Yuan

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  1. Zhijian Li
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  2. Hongli Yuan
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Correspondence to Hongli Yuan.

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Li, Z., Yuan, H. Characterization of cadmium removal by Rhodotorula sp. Y11. Appl Microbiol Biotechnol 73, 458–463 (2006). https://doi.org/10.1007/s00253-006-0473-8

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  • DOI: https://doi.org/10.1007/s00253-006-0473-8

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