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. 2018 Feb 22;18(2):642. doi: 10.3390/s18020642

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scanning electron microscope images of carbon felt electrodes showing the surface of the anode electrodes before (a) and after (b) treating actual wastewater. Cyclic voltammetry (CV) curves for SMFC of control and SMFC with Cr(VI) (c). Scanning rate was 0.025 V s⁻¹.

Scanning electron microscope images of carbon felt electrodes showing the surface of the anode electrodes before (a) and after (b) treating actual wastewater. Cyclic voltammetry (CV) curves for SMFC of control and SMFC with Cr(VI) (c). Scanning rate was 0.025 V s⁻¹.