Zhang, HK; Han, KM; Hu, XK1
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
2020-06-01
卷号389页码:124464
关键词extracellular electron-transfermtr respiratory pathwaycr(vi) reductionmethyl-orangegraphenedegradationbacteriumtranscriptomemechanismsmediators
研究领域Engineering, Environmental; Engineering, Chemical
DOI10.1016/j.cej.2020.124464
通讯作者Hu, Xiaoke(xkhucas@163.com)
作者部门海岸带生物学与生物资源保护实验室
英文摘要The slow anaerobic reduction rate of 2,5-dichloronitrobenzene (DCNB) is a bottleneck during its biotreatment. In this study, the process and mechanism of enhanced DCNB bioreduction by a 2-amino-3-hydroxy-anthraquinone/reduced grapheme oxide (AHQ/RGO) binary nanocomposite in the presence of Shewanella oneidensis MR-1 (MR1) are reported. AHQ/RGO was prepared using a one-step covalent combination method under mild conditions, and the as-prepared binary nanocomposite was further characterized by SEM, TEM, AFM, EA, UV-Vis, XRD, XPS, FTIR and electrochemical analyses. The results of catalytic assays showed that enhanced DCNB bioreduction to 2,5-dichloroaniline could be achieved in the presence of 30 mg/L AHQ/RGO and the k (h(-1)) value of the AHQ/RGO-supplemented system is 7.7- and 4.2-fold greater than that of the control and GO-supplemented systems, respectively. Moreover, molecular studies showed that the genes encoding cytochromes and reductases (especially yceJ and azoR) play key roles during the reduction of DCNB by MR-1 cells and multiple electron transfer pathways are involved during AHQ/RGO-mediated DCNB bioreduction. In addition, a synergistic effect between AHQ/RGO and outer membrane proteins of MR-1 was confirmed by mutant assays and is likely responsible for the catalytic performance of AHQ/RGO. This work provides a potential application of strain MR-1 and AHQ/ RGO in enhancing the treatment of DCNB-containing wastewater.
文章类型Article
资助机构National Natural Science Foundation of China; Yantai Science and Technology Project; State Key Joint Laboratory of Environment Simulation and Pollution Control (Research center for Eco-Environmental Sciences, Chinese Academy of Sciences); External Cooperation Program of Chinese Academy of Sciences; Key Research Project of Frontier Science of Chinese Academy of Sciences
收录类别SCI
语种英语
关键词[WOS]extracellular electron-transfer; mtr respiratory pathway; cr(vi) reduction; methyl-orange; graphene; degradation; bacterium; transcriptome; mechanisms; mediators
研究领域[WOS]Engineering, Environmental; Engineering, Chemical
WOS记录号WOS:000519528800062
引用统计被引频次：2[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/25286
专题海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
通讯作者Hu, XK作者单位1.Chinese Acad Sci, Yantai Inst Costal Zone Res, Yantai 264000, Peoples R China;
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China;
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
推荐引用方式
GB/T 7714Zhang, HK,Han, KM,Hu, XK. Enhanced bioreduction of 2,5-dichlorobenzene by an AHQ/RGO binary nanocomposite through a synergistic effect with outer membrane proteins of Shewanella oneidensis MR-1[J]. CHEMICAL ENGINEERING JOURNAL,2020,389:124464.
APAZhang, HK,Han, KM,&Hu, XK.(2020).Enhanced bioreduction of 2,5-dichlorobenzene by an AHQ/RGO binary nanocomposite through a synergistic effect with outer membrane proteins of Shewanella oneidensis MR-1.CHEMICAL ENGINEERING JOURNAL,389,124464.
MLAZhang, HK,et al."Enhanced bioreduction of 2,5-dichlorobenzene by an AHQ/RGO binary nanocomposite through a synergistic effect with outer membrane proteins of Shewanella oneidensis MR-1".CHEMICAL ENGINEERING JOURNAL 389(2020):124464.
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