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Environmental Science and Pollution Research

, Volume 26, Issue 13, pp 12698–12708 | Cite as

Characterization of the Cd(II) and nitrate removal by bacterium Acinetobacter sp. SZ28 under different electron donor conditions

  • Jun Feng SuEmail author
  • Chun Yu Gao
  • Ting Lin Huang
  • Xue Chen Bai
  • Dong Hui Liang
  • Lei He
Research Article
  • 54 Downloads

Abstract

In this study, zero-valent iron (ZVI), nanoscale zero-valent iron (nZVI), Fe(II), and Mn(II) were investigated for their effects on mixotrophic denitrification coupled with cadmium (Cd(II)) adsorption process by Acinetobacter sp. SZ28. The removal rates of nitrate were 0.228 mg L−1 h−1 (ZVI), 0.133 mg L−1 h−1 (nZVI), 0.309 mg L−1 h−1 (Fe(II)) and 0.234 mg L−1 h−1 (Mn(II)), respectively. The Cd(II) removal efficiencies were 97.23% (ZVI), 95.79% (nZVI), 80.63% (Fe(II)), and 84.58% (Mn(II)), respectively. Meteorological chromatography analysis indicated that the characteristics of gas composition were different under different electron donor conditions. Moreover, characterization of bacterial metabolites produced by strain SZ28 under different conditions was analyzed. Sequence amplification identified the presence of the nitrate reductase gene (napA) and Mn(II)-oxide gene (cumA) in strain SZ28. The results of XRD and SEM indicated that ZVI, nZVI, Fe(II), and Mn(II) were oxidized into corresponding oxides. XPS spectra indicated that the Cd(II) was adsorbed onto biogenic precipitation.

Keywords

Mixotrophic denitrification Electron donor Cadmium removal Nitrogen Biological metabolites 

Notes

Funding

This research work was partly supported by the National Natural Science Foundation of China (NSFC) (No. 51678471), the National Key Research and Development Program of China (2016YFC0400706), and Key Scientific Technological Innovation Team Plan of Shaanxi Province (No. 2017KCT-19-02).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of EducationXi’ an University of Architecture and TechnologyXi’anChina
  2. 2.Shaanxi Key Laboratory of Environmental EngineeringXi’an University of Architecture and TechnologyXi’anChina
  3. 3.China United Northwest Institute for Engineering Design and Research Co., Ltd (CUCED)Xi’anChina

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