Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions

科研成果详情

题名	Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions
作者	Zheng Chen; Yaxian Zhang ; Qingliu Luo ; Liuying Wang; Shurui Liu ; Yajuan Peng ; Haitao Wang ; Liang Shen ; Qingbiao Li ; Yuanpeng Wang
发表日期	2019-03-08
发表期刊	Journal of Environmental Sciences 影响因子和分区
语种	英语
关键词	Iron Ferrihydrite Nanoparticles Reduction Geobacter sulfurreducens
摘要	Microbially mediated bioreduction of iron oxyhydroxide plays an important role in the biogeochemical cycle of iron.Geobacter sulfurreducens is a representative dissimilatory ironreducing bacterium that assembles electrically conductive pili and cytochromes.The impact of supplementation withγ-Fe_2O_3 nanoparticles(NPs)(0.2 and 0.6 g)on the G.sulfurreducens-mediated reduction of ferrihydrite was investigated.In the overall performance of microbial ferrihydrite reduction mediated byγ-Fe_2O_3 NPs,stronger reduction was observed in the presence of direct contact withγ-Fe_2O_3 NPs than with indirect contact.Compared to the production of Fe(Ⅱ)derived from biotic modification with ferrihydrite alone,increases greater than 1.6-and 1.4-fold in the production of Fe(Ⅱ)were detected in the biotic modifications in which direct contact with 0.2 g and 0.6 gγ-Fe_2O_3 NPs,respectively,occurred.X-ray diffraction analysis indicated that magnetite was a unique representative iron mineral in ferrihydrite when active G.sulfurreducens cells were in direct contact withγ-Fe_2O_3 NPs.Because of the sorption of biogenic Fe(Ⅱ)ontoγ-Fe_2O_3 NPs instead of ferrihydrite,the addition ofγ-Fe_2O_3 NPs could also contribute to increased duration of ferrihydrite reduction by preventing ferrihydrite surface passivation.Additionally,electron microscopy analysis confirmed that the direct addition ofγ-Fe_2O_3 NPs stimulated the electrically conductive pili and cytochromes to stretch,facilitating long-range electron transfer between the cells and ferrihydrite.The obtained findings provide a more comprehensive understanding of the effects of iron oxide NPs on soil biogeochemistry.
资助项目	supported by the National Natural Science Foundation of China (Nos. 41571449, 41271260, 41276101 and 41807035);; the Fundamental Research Fund for the Central Universities of China (No. 20720160083);; the Natural Science Foundation of Fujian Province of China (Nos. 2018J05073 and 2018Y0074);; the Project of Educational Scientific Research of Fujian Province of China (Nos. JAT170831 and JA13344);; the Open Fund of Key Laboratory of Measurement and Control System for Coastal Environment of China (No. S1-KF1701)
ISSN	1001-0742
卷号	78 期号:04 页码:193-203
收录类别	CNKI
文献类型	期刊论文
条目标识符	https://kms.wmu.edu.cn/handle/3ETUA0LF/134227
专题	公共卫生学院
作者单位	1.Department of Chemical and Biochemical Engineering,College of Chemistry and Chemical Engineering,Xiamen University 2.Department of Environmental Science,School of Environmental Science and Engineering,Tan Kah Kee College,Xiamen University 3.Key Laboratory of Measurement and Control System for Coastal Environment,Fuqing Branch of Fujian Normal University 4.Zhejiang Provincial Key Laboratory of Watershed Science and Health,School of Public Health and Management,Wenzhou Medical University
推荐引用方式 GB/T 7714	Zheng Chen,Yaxian Zhang,Qingliu Luo,et al. Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions[J]. Journal of Environmental Sciences,2019,78(04):193-203.
APA	Zheng Chen., Yaxian Zhang., Qingliu Luo., Liuying Wang., Shurui Liu., ... & Yuanpeng Wang. (2019). Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions. Journal of Environmental Sciences, 78(04), 193-203.
MLA	Zheng Chen,et al."Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions".Journal of Environmental Sciences 78.04(2019):193-203.

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