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Bioelectrochemistry

Title:		Sub-toxic concentrations of volatile organic compounds inhibit extracellular respiration of Escherichia coli cells grown in anodic bioelectrochemical systems
Author(s):		Santoro C; Mohidin AF; Grasso LL; Seviour T; Palanisamy K; Hinks J; Lauro FM; Marsili E;
Address:		"Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, SBS-01N-27, Singapore 637551, Singapore. Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, SBS-01N-27, Singapore 637551, Singapore; Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore. Singapore Centre for Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, SBS-01N-27, Singapore 637551, Singapore; School of Chemical and Biomedical Engineering, Nanyang Technological University, 42 Nanyang Drive, Singapore 637459, Singapore. Electronic address: emarsili@ntu.edu.sg"
Journal Title:		Bioelectrochemistry
Year:		2016
Volume:		20160221
Issue:
Page Number:		173 - 177
DOI:		10.1016/j.bioelechem.2016.02.003
ISSN/ISBN:		1878-562X (Electronic) 1567-5394 (Linking)
Abstract:		"Low-cost and rapid detection of volatile organic compounds (VOCs) is important for the control of water quality of used water and protection of downstream used water treatment processes. In this work, the effect of sub-toxic concentration of VOCs on the current output of Escherichia coli in bioelectrochemical systems (BES) is shown, in light of environmental sensing applications for sewage and used water networks. E. coli cells were grown on carbon felt electrodes in artificial used water, to increase sensitivity and decrease response time for detection. Extracellular electron transfer was promoted by the addition of a biocompatible redox mediator, 2-hydroxy-1,4-naphthoquinone (HNQ). Among the eight VOCs investigated, toluene is the most toxic to E. coli, with a detection limit of 50+/-2mgL(-1) and current output of 32+/-1nAmg(-1)L(-1). This work offers a straightforward route to enhance the detection of organic contaminants in used water for environmental applications"
Keywords:		"Cell Proliferation/drug effects Dose-Response Relationship, Drug Electric Conductivity Electrochemistry Electrodes Escherichia coli/cytology/*drug effects/*metabolism Extracellular Space/*drug effects/*metabolism Volatile Organic Compounds/*toxicity Water;"
Notes:		"MedlineSantoro, Carlo Mohidin, Abeed Fatima Grasso, Letizia Lo Seviour, Thomas Palanisamy, Kannan Hinks, Jamie Lauro, Federico M Marsili, Enrico eng Netherlands 2016/03/08 Bioelectrochemistry. 2016 Dec; 112:173-7. doi: 10.1016/j.bioelechem.2016.02.003. Epub 2016 Feb 21"