کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
679014 1459933 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of electrically-conductive nanoscale filaments by sulfate-reducing bacteria in the microbial fuel cell
ترجمه فارسی عنوان
تولید رشته های نانومقیاس الکتریکی هدایت شده توسط باکتری های کاهش دهنده سولفات در سلول های سوختی میکروبی
کلمات کلیدی
باکتری های کاهش سولفات؛ Desulfovibrio desulfuricans؛ نانوفیلم باکتریایی هدایت گیرنده الکترون نامحلال؛ سلول های سوختی میکروبی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Sulfate-reducing bacteria produce nanoscale filaments for extracellular electron transfer.
• These nanofilaments were electrically-conductive.
• Nanofilaments can transfer electrons directly to insoluble extracellular electron acceptors.
• Bacterial nanofilament is an alternative strategy to use insoluble electron acceptors.

This study reports that the obligate anaerobic microorganism, Desulfovibrio desulfuricans, a predominant sulfate-reducing bacterium (SRB) in soils and sediments, can produce nanoscale bacterial appendages for extracellular electron transfer. These nanofilaments were electrically-conductive (5.81 S·m−1) and allowed SRBs to directly colonize the surface of insoluble or solid electron acceptors. Thus, the direct extracellular electron transfer to the insoluble electrode in the microbial fuel cell (MFC) was possible without inorganic electron-shuttling mediators. The production of nanofilaments was stimulated when only insoluble electron acceptors were available for cellular respiration. These results suggest that when availability of a soluble electron acceptor for SRBs (SO42−) is limited, D. desulfuricans initiates the production of conductive nanofilaments as an alternative strategy to transfer electrons to insoluble electron acceptors. The findings of this study contribute to understanding of the role of SRBs in the biotransformation of various substances in soils and sediments and in the MFC.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 210, June 2016, Pages 61–67
نویسندگان
, , , , , , ,