Interaction of Cr(VI) reduction and denitrification by strain Pseudomonas aeruginosa PCN-2 under aerobic conditions

doi:10.1016/j.biortech.2015.02.109

CORC > 北京大学 > 环境科学与工程学院

	Interaction of Cr(VI) reduction and denitrification by strain Pseudomonas aeruginosa PCN-2 under aerobic conditions
	He Da ; Zheng Maosheng ; Ma Tao ; Li Can ; Ni Jinren
刊名	生物资源技术
	2015
关键词	Aerobic denitrification,Cr(VI) reduction,Electron competition,Pseudomonas aeruginosa
DOI	10.1016/j.biortech.2015.02.109
英文摘要	Inhibition of efficient denitrification in presence of toxic heavy metals is one of the current problems encountered in municipal wastewater treatment plants. This paper presents how to remove hexavalent chromium (Cr(VI)) and nitrate simultaneously by the novel strain Pseudomonas aeruginosa PCN-2 under aerobic conditions. The capability of strain PCN-2 for Cr(VI) and nitrate reduction was confirmed by PCR analysis of gene ChrR, napA, nirS, cnorB, nosZ, while Cr(VI) reduction was proved via an initial single-electron transfer through Cr(V) detection using electron paramagnetic resonance. Experimental results demonstrated that Cr(VI) and nitrate reduction by strain PCN-2 was much faster at pH 8-9 and higher initial cell concentration. However, increasing Cr(VI) concentration would inhibit aerobic denitrification process and result in an significant delay of nitrate reduction or N2O accumulation, which was attributed to competition between three electron acceptors, i.e., Cr(VI), O2 and nitrate in the electron transport chain.Copyright ? 2015 Elsevier Ltd. All rights reserved.; SCI(E); EI; PubMed; 0; ARTICLE; nijinren@iee.pku.edu.cn; 346-52; 185
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/188213]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	He Da,Zheng Maosheng,Ma Tao,et al. Interaction of Cr(VI) reduction and denitrification by strain Pseudomonas aeruginosa PCN-2 under aerobic conditions[J]. 生物资源技术,2015.
APA	He Da,Zheng Maosheng,Ma Tao,Li Can,&Ni Jinren.(2015).Interaction of Cr(VI) reduction and denitrification by strain Pseudomonas aeruginosa PCN-2 under aerobic conditions.生物资源技术.
MLA	He Da,et al."Interaction of Cr(VI) reduction and denitrification by strain Pseudomonas aeruginosa PCN-2 under aerobic conditions".生物资源技术 (2015).