柳广飞

个人信息Personal Information

副教授

博士生导师

硕士生导师

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:环境学院

学科:环境工程. 环境科学

办公地点:环境学院711室

联系方式:0411-84706252

电子邮箱:guangfeiliu@dlut.edu.cn

扫描关注

论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Accelerated removal of Sudan dye by Shewanella oneidensis MR-1 in the presence of quinones and humic acids

点击次数:

论文类型:期刊论文

发表时间:2013-09-01

发表刊物:WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY

收录刊物:SCIE、EI、PubMed、Scopus

卷号:29

期号:9

页面范围:1723-1730

ISSN号:0959-3993

关键字:Shewanella oneidensis MR-1; Sudan dye; Quinone; Humic acid

摘要:Although there have been many studies on bacterial removal of soluble azo dyes, much less information is available for biological treatment of water-insoluble azo dyes. The few bacterial species capable of removing Sudan dye generally require a long time to remove low concentrations of insoluble dye particles. The present work examined the efficient removal of Sudan I by Shewanella oneidensis MR-1 in the presence of redox mediator. It was found that the microbially reduced anthraquinone-2,6-disulfonate (AQDS) could abiotically reduce Sudan I, indicating the feasibility of microbially-mediated reduction. The addition of 100 mu M AQDS and other different quinone compounds led to 4.3-54.7 % increase in removal efficiencies in 22 h. However, adding 5-hydroxy-1,4-naphthoquinone into the system inhibited Sudan I removal. The presence of 10, 50 and 100 mu M AQDS stimulated the removal efficiency in 10 h from 26.4 to 42.8, 54.9 and 64.0 %, respectively. The presence of 300 mu M AQDS resulted in an eightfold increase in initial removal rate from 0.19 to 1.52 mg h(-1) g(-1) cell biomass. A linear relationship was observed between the initial removal rates and AQDS concentrations (0-100 mu M). Comparison of Michaelis-Menten kinetic constants revealed the advantage of AQDS-mediated removal over direct reduction. Different species of humic acid could also stimulate the removal of Sudan I. Scanning electronic microscopy analysis confirmed the accelerated removal performance in the presence of AQDS. These results provide a potential method for the efficient removal of insoluble Sudan dye.