کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7704735 1496894 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conductive properties of methanogenic biofilms
ترجمه فارسی عنوان
خواص هدایت بیوفیلم های متانوژنیک
کلمات کلیدی
بیوفیلم های متانولی رسانایی الکتریکی، اندازه گیری هدایت در محل،
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
Extracellular electron transfer between syntrophic partners needs to be efficiently maintained in methanogenic environments. Direct extracellular electron transfer via electrical current is an alternative to indirect hydrogen transfer but requires construction of conductive extracellular structures. Conductive mechanisms and relationship between conductivity and the community composition in mixed-species methanogenic biofilms are not well understood. The present study investigated conductive behaviors of methanogenic biofilms and examined the correlation between biofilm conductivity and community composition between different anaerobic biofilms enriched from the same inoculum. Highest conductivity observed in methanogenic biofilms was 71.8 ± 4.0 μS/cm. Peak-manner response of conductivity upon changes over a range of electrochemical potentials suggests that electron transfer in methanogenic biofilms occurs through redox driven super-exchange. The strong correlation observed between biofilm conductivity and Geobacter spp. in the metabolically diverse anaerobic communities suggests that the efficiency of DEET may provide pressure for microbial communities to select for species that can produce electrical conduits.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioelectrochemistry - Volume 119, February 2018, Pages 220-226
نویسندگان
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