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

Enhanced nitrobenzene biotransformation by graphene-anaerobic sludge composite

点击次数:

论文类型:期刊论文

发表时间:2014-05-01

发表刊物:JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

收录刊物:SCIE、EI、Scopus

卷号:89

期号:5

页面范围:750-755

ISSN号:0268-2575

关键字:nitrobenzene; graphene oxide; biotransformation; graphene-anaerobic sludge composite

摘要:BACKGROUND Traditional anaerobic bioprocesses have failed to achieve the efficient biotransformation of nitrobenzene. Thus, graphene-anaerobic sludge composite as a novel biocatalyst was proposed for the enhancement of nitrobenzene biotransformation. RESULTS Reduced graphene oxide/anaerobic sludge (RGO/AS) composite presented good settling performance when graphene oxide (GO) was added into an AS system for 24 h cultivation. The presence of RGO resulted in enhanced nitrobenzene biotransformation by AS, and the highest removal efficiency of nitrobenzene was observed with initial GO (3-5 mu m) vs sludge ratio of 0.075 (w/w). Dehydrogenase activity in the RGO/AS system increased approximately 2-fold over that in the AS system and redox active species appeared in supernatant from the RGO/AS system. The ratio of acetate to propionate increased in the RGO/AS system during glucose fermentation, and nitrobenzene biotransformation by both AS and RGO/AS systems was independent of methanogenesis, but dependent on acetogenesis. Moreover, bound and free extracellular polymeric substances (EPS) from RGO/AS composite were involved in direct biotransformation of nitrobenzene, and bound EPS might interact with secreted redox active species to accelerate nitrobenzene biotransformation by extracellular electron transfer. CONCLUSION RGO/AS composite was efficient for the treatment of nitrobenzene wastewater. (c) 2013 Society of Chemical Industry