Online self-powered Cr(VI) monitoring with autochthonous Pseudomonas and a bio-inspired redox polymer
- PDF / 502,172 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 83 Downloads / 147 Views
RESEARCH PAPER
Online self-powered Cr(VI) monitoring with autochthonous Pseudomonas and a bio-inspired redox polymer Irene C. Lazzarini Behrmann 1,2 & Matteo Grattieri 2 & Shelley D. Minteer 2 & Silvana A. Ramirez 1 & Diana L. Vullo 1,3 Received: 12 January 2020 / Revised: 24 March 2020 / Accepted: 26 March 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The assessment of water quality is critical to implement preventive and emergency interventions aimed to limit/avoid environmental contamination and human exposure to toxic compounds. While established high-resolution techniques allow quantitative and qualitative determination of contaminants, their widespread application is not feasible due to cost, time, and need for trained personnel. In this context, the development of easy-to-implement approaches for preliminary detection of contaminants is of the utmost importance. Herein, a portable self-powered microbial electrochemical sensor enabling online monitoring of Cr(VI) is reported. The biosensor employs a bio-inspired redox mediating system to allow extracellular electron transfer between a bacterial isolate from chromium-contaminated environments and the electrode, providing a clear response to Cr(VI) presence. The biosensor shows good linearity (R2 = 0.983) and a limit of detection of 2.4 mg L−1 Cr(VI), with a sensitivity of 0.31 ± 0.02 μA cm−2 mgCr(VI)−1 L. The presented microbial bioanode architecture enhanced biosensor performance thanks to the improved “electrical wiring” between biological entities and the abiotic electrode surface. This approach could be easily implemented in engineered electrode surfaces, such as paper-based multi-anodes that maximize bacterial colonization, further improving biosensor response.
Keywords Self-powered biosensor . Cr detection . Online sensor . Microbial fuel cell . Redox polymer . Pseudomonas veronii Abbreviations MFC Microbial fuel cell MOPS 3-(N-morpholino)propanesulfonic acid
NQ-LPEI SCE
Naphthoquinone-modified linear polyethyleneimine polymer Saturated calomel electrode
Introduction Published in the topical collection featuring Female Role Models in Analytical Chemistry. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00216-020-02620-w) contains supplementary material, which is available to authorized users. * Shelley D. Minteer [email protected] * Diana L. Vullo [email protected] 1
Instituto de Ciencias, Universidad Nacional de General Sarmiento, J.M. Gutierrez 1150, B1613GSX, Los Polvorines, Buenos Aires, Argentina
2
Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, UT 84112, USA
3
CONICET, Godoy Cruz 2290, C1425FQB, Buenos Aires, Argentina
Access to safe water is regarded as critical to fulfilling the broad set of goals of the 2030 Agenda for Sustainable Development set by the United Nations [1]. This includes access to safe water for agricultural purposes, which significantly contributes to economic development and food supply. Accor
Data Loading...
