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Applied Microbiology and Biotechnology

, Volume 73, Issue 2, pp 458–463 | Cite as

Characterization of cadmium removal by Rhodotorula sp. Y11

  • Zhijian Li
  • Hongli YuanEmail author
Applied Microbial and Cell Physiology

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.

Keywords

Biosorption Metal Uptake Uptake Capacity Rhodotorula Biosorption Capacity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

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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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.College of Biological Sciences, Key Laboratory of Agro-Microbial Resource and Application, Ministry of AgricultureChina Agricultural UniversityBeijingPeople’s Republic of China

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