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Study on Chromium (VI) Reduction Kinetics by Pseudomonas aeruginosa Using a Combined System of Acoustic Wave Impedance Analyzer and UV-Vis Spectrophotometer

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Abstract

A novel system combining acoustic wave impedance (AWI) analyzer with UV-vis spectrophotometer was developed for the study of chromium (VI) reduction kinetics by Pseudomonas aeruginosa. AWI gave information about the growth of Pseudomonas aeruginosa, and UV-vis spectrophotometer gave information about the concentration of chromium (VI) simultaneously. A combined system response model, for chromium (VI) reduction kinetics at lower initial chromium (VI) concentrations, was derived and proved based on the novel system. Taking into account the effect of bacterial growth on chromium (VI) reduction, the new model successfully simulated chromium (VI) bioremediation process. By fitting chromium (VI) reduction data toward the derived model, the kinetic parameters related to the process were obtained. When the concentration of peptone was 10 g L−1, the half-velocity reduction rate constant K C and the maximum specific chromium (VI) reduction rate constant νmax were 0.7682 mg chromium (VI) L−1 and 2.5814 × 10−12 mg chromium (VI) cells−1 h−1, respectively. It was found that the combined system can provide real-time, reliable, and two-dimensional kinetic information, and can be applied to study other biological processes.

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Acknowledgments

The authors gratefully acknowledge the financial support of Special Research Found for the Doctoral Program of Higher Education and the Human Provincial, Natural Science Foundation of China (No. 05JJ20011).

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Authors and Affiliations

  1. State Key Laboratory of Chemo/Biosensoring and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, Changsha, 410082, PR China

    Xuefang Li, Wanzhi Wei, Xiandong Zeng, Deliang He, Jian Yin, Jinxiang Zeng & Ling Wu

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  1. Xuefang Li
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  2. Wanzhi Wei
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  3. Xiandong Zeng
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  4. Deliang He
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  5. Jian Yin
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  6. Jinxiang Zeng
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  7. Ling Wu
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Correspondence to Wanzhi Wei.

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Li, X., Wei, W., Zeng, X. et al. Study on Chromium (VI) Reduction Kinetics by Pseudomonas aeruginosa Using a Combined System of Acoustic Wave Impedance Analyzer and UV-Vis Spectrophotometer. Curr Microbiol 53, 249–254 (2006). https://doi.org/10.1007/s00284-006-0123-5

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  • DOI: https://doi.org/10.1007/s00284-006-0123-5

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