화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.36, No.7, 1140-1147, July, 2019
DOI10.1007/s11814-019-0298-7  Export Citation
Mechanism of the simultaneous removal of nitrate and Ni(II) by Enterobacter sp. CC76 through mixotrophic denitrification processes
Jun Feng Su1, 2, †, Shu Yang1, 2, Ting Lin Huang1, 2, Xue Chen Bai3, Jin Suo Lu1, 2, Lei He3, and Min Li1, 2
  • 1Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China
  • 2Shaanxi Key Laboratory of Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China
  • 3China United Northwest Institute for Engineering Design and Research Co., Ltd. (CUCED), Xi’an 710077, P. R. China
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We studied the mechanism for the simultaneous removal of nitrate and Ni(II) by Enterobacter sp. CC76. Response surface methodology results showed that the maximum removal ratios of nitrate and Ni(II) were 95.02% and 75.99% under the following conditions: pH 7.37, 54.31mgㆍL-1 Fe(II), and 10.00mgㆍL-1 Ni(II). The mechanism of Ni(II) removal involved Fe-oxide adsorption and the increase of pH. In addition, meteorological chromatography analysis indicated that Ni(II) affected gas composition during denitrification. Scanning electron microscopy and X-ray photoelectron spectroscopy confirmed that Fe-oxide adsorption was the main contributor to Ni(II) removal. This study shows that Enterobacter sp. CC76 can enhance the adsorption of Ni(II) onto Fe-oxides while removing nitrate.
Keywords:Mixotrophic Denitrification;Ni(II) Removal;Nitrate Removal;Response Surface Methodology (RSM);Adsorption
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