Next Article in Journal
A Novel Unsupervised Adaptive Learning Method for Long-Term Electromyography (EMG) Pattern Recognition
Next Article in Special Issue
France’s State of the Art Distributed Optical Fibre Sensors Qualified for the Monitoring of the French Underground Repository for High Level and Intermediate Level Long Lived Radioactive Wastes
Previous Article in Journal
Gold Electrodes Modified with Calix[4]arene for Electrochemical Determination of Dopamine in the Presence of Selected Neurotransmitters
Previous Article in Special Issue
High Dynamic Range Spectral Imaging Pipeline For Multispectral Filter Array Cameras
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(6), 1372; doi:10.3390/s17061372

A Multi-Parametric Device with Innovative Solid Electrodes for Long-Term Monitoring of pH, Redox-Potential and Conductivity in a Nuclear Waste Repository

1
Water, Environment and Eco-technologies, BRGM French Geological Survey, 45060 Orléans, France
2
Laboratory of Chemical Engineering, Université de Toulouse III Paul Sabatier, 31062 Toulouse, France
3
Monitoring and Data Processing Department (DRD/MTD), ANDRA French National Radioactive Waste Management Agency, 92290 Châtenay Malabry, France
*
Authors to whom correspondence should be addressed.
Academic Editors: Nicole Jaffrezic-Renault and Gaelle Lissorgues
Received: 7 April 2017 / Revised: 19 May 2017 / Accepted: 2 June 2017 / Published: 13 June 2017
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in France 2016)
View Full-Text   |   Download PDF [3888 KB, uploaded 13 June 2017]   |  

Abstract

We present an innovative electrochemical probe for the monitoring of pH, redox potential and conductivity in near-field rocks of deep geological radioactive waste repositories. The probe is composed of a monocrystalline antimony electrode for pH sensing, four AgCl/Ag-based reference or Cl selective electrodes, one Ag2S/Ag-based reference or S2− selective electrode, as well as four platinum electrodes, a gold electrode and a glassy-carbon electrode for redox potential measurements. Galvanostatic electrochemistry impedance spectroscopy using AgCl/Ag-based and platinum electrodes measure conductivity. The use of such a multi-parameter probe provides redundant information, based as it is on the simultaneous behaviour under identical conditions of different electrodes of the same material, as well as on that of electrodes made of different materials. This identifies the changes in physical and chemical parameters in a solution, as well as the redox reactions controlling the measured potential, both in the solution and/or at the electrode/solution interface. Understanding the electrochemical behaviour of selected materials thus is a key point of our research, as provides the basis for constructing the abacuses needed for developing robust and reliable field sensors. View Full-Text
Keywords: multi-parametric probe; all-solid-state electrodes; reference electrodes; pH sensor; redox potential; conductivity; galvanostatic electrochemistry impedance spectroscopy (GEIS); nuclear waste disposal monitoring multi-parametric probe; all-solid-state electrodes; reference electrodes; pH sensor; redox potential; conductivity; galvanostatic electrochemistry impedance spectroscopy (GEIS); nuclear waste disposal monitoring
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Daoudi, J.; Betelu, S.; Tzedakis, T.; Bertrand, J.; Ignatiadis, I. A Multi-Parametric Device with Innovative Solid Electrodes for Long-Term Monitoring of pH, Redox-Potential and Conductivity in a Nuclear Waste Repository. Sensors 2017, 17, 1372.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top