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Molecules
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Electroanalytical Trace Metal Quantification and Speciation
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Electroanalytical Trace Metal Quantification and Speciation

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 4489

Special Issue Editors

Prof. Dr. José Paulo Pinheiro

E-Mail Website
Guest Editor
CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR7360, 8 Vandoeuvre-lès-Nancy F54501, France
Interests: trace metals; electroanalytical techniques; speciation; bioavailability; natural organic matter
Dr. Elise Rotureau

E-Mail Website
Guest Editor
CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR7360, 8 Vandoeuvre-lès-Nancy F54501, France
Interests: trace metals; electroanalytical techniques; speciation; bioavailability; biosensors; colloids

Special Issue Information

Dear Colleagues,

Electroanalytical devices and methods are well suited for trace metal quantification, especially in the field, due to their low cost, small dimensions, and extremely low detection limits. They also provide the almost unique ability to investigate trace metal speciation, and the phenomena of metal reduction at certain electrodes can be used as models for bioavailability studies.

This Special Issue will report on new developments in trace metal quantification and speciation by electroanalytical techniques—namely, new electrode materials, the additive manufacturing of electrodes and electrochemical devices, theoretical and experimental method developments, and new applications to field surveys. 

Prof. Dr. José Paulo Pinheiro
Dr. Elise Rotureau
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electroanalytical
  • trace metals
  • speciation
  • quantification
  • bioavailability
  • field survey
  • new electrode materials
  • additive manufacturing

Published Papers (3 papers)

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Research

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14 pages, 1696 KiB  
Article
Developing a Compost Quality Index (CQI) Based on the Electrochemical Quantification of Cd (HA) Reactivity
by Ana C. Silva, Pedro Rocha, Dulce Geraldo, Ana Cunha, Juan Antelo, José P. Pinheiro, Sarah Fiol and Fátima Bento
Molecules 2023, 28(3), 1503; https://doi.org/10.3390/molecules28031503 - 03 Feb 2023
Cited by 1 | Viewed by 1532
Abstract
The present work demonstrates the use of Cd2+ as a reactivity probe of the fulvic acids (FAs), humic acids (HAs) and dissolved organic matter (DOM) compost extracts. Significant differences were observed between the extracts, with the HA extract showing the highest reactivity. [...] Read more.
The present work demonstrates the use of Cd2+ as a reactivity probe of the fulvic acids (FAs), humic acids (HAs) and dissolved organic matter (DOM) compost extracts. Significant differences were observed between the extracts, with the HA extract showing the highest reactivity. Comparing the different composts, the largest reactivity variation was again observed for HA then FA and finally DOM extracts. The Cd2+ binding extent was used to calculate the quality of composts and compared with a reference of uncomposted organic fertiliser (FLW), leading to the definition of an operational scale of compost quality. The parameter equivalent mass of fertiliser (mEF) was used for this scale sorted the seven composts from 0.353 to 1.09 kg FLW, for compost of sewage sludge (CSS) and vermicompost of domestic waste (CVDW), respectively. The significance of this parameter was verified through a correlation analysis between binding extent and the effect of compost application on lettuce crop growth in a field trial. The results demonstrate the potentiality of FA and HA extracts as markers of compost bioactivity and the use of Cd2+ as a reactivity probe. Full article
(This article belongs to the Special Issue Electroanalytical Trace Metal Quantification and Speciation)
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12 pages, 2469 KiB  
Article
ISIDORE, a Probe for In Situ Trace Metal Speciation Based on the Donnan Membrane Technique and Electrochemical Detection Part 2: Cd and Pb Measurements during the Accumulation Time of the Donnan Membrane Technique
by Estelle Ricard, Jose-Paulo Pinheiro, Isabelle Le Hécho and Corinne Parat
Molecules 2023, 28(2), 846; https://doi.org/10.3390/molecules28020846 - 14 Jan 2023
Viewed by 1116
Abstract
The Donnan membrane technique (DMT), in which a synthetic or natural solution (the “donor”) is separated from a ligand-free solution (the “acceptor”) by a cation-exchange membrane, is a recognized technique for measuring the concentration of a free metal ion in situ, with coupling [...] Read more.
The Donnan membrane technique (DMT), in which a synthetic or natural solution (the “donor”) is separated from a ligand-free solution (the “acceptor”) by a cation-exchange membrane, is a recognized technique for measuring the concentration of a free metal ion in situ, with coupling to electrochemical detection allowing for the quantification of the free metal ion directly on site. However, the use of the DMT requires waiting for the free metal ion equilibrium between the donor and the acceptor solution. In this paper, we investigated the possibility of using the kinetic information and showed that non-equilibrium experimental calibrations of Cd and Pb with the ISIDORE probe could be used to measure free metal concentrations under conditions of membrane-controlled diffusion transport. The application of this dynamic approach made it possible to successfully determine the concentration of free Cd in synthetic and natural river samples. Furthermore, it was found that the determination of free Cd from the slope was not affected by the Ca concentration ratio between the acceptor and donor solution, as opposed to the traditional approach based on Donnan equilibrium. This ISIDORE probe appears to be a promising tool for determining free metal ions in natural samples. Full article
(This article belongs to the Special Issue Electroanalytical Trace Metal Quantification and Speciation)
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Review

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20 pages, 1083 KiB  
Review
Electroanalytical Trace Metal Cations Quantification and Speciation in Freshwaters: Historical Overview, Critical Review of the Last Five Years and Road Map for Developing Dynamic Speciation Field Measurements
by José Paulo Pinheiro and Elise Rotureau
Molecules 2023, 28(6), 2831; https://doi.org/10.3390/molecules28062831 - 21 Mar 2023
Cited by 1 | Viewed by 1333
Abstract
An historical overview covering the field of electroanalytical metal cations speciation in freshwaters is presented here, detailing both the notable experimental and theoretical developments. Then, a critical review of the progress in the last five years is given, underlining in particular the improvements [...] Read more.
An historical overview covering the field of electroanalytical metal cations speciation in freshwaters is presented here, detailing both the notable experimental and theoretical developments. Then, a critical review of the progress in the last five years is given, underlining in particular the improvements in electrochemical setups and methodologies dedicated to field surveys. Given these recent achievements, a road map to carry out on-site dynamic metal speciation measurements is then proposed, and the key future developments are discussed. This review shows that electroanalytical stripping techniques provide a unique framework for quantitatively assessing metals at trace levels while offering access to both thermodynamic and dynamic features of metal complexation with natural colloidal and particulate ligands. Full article
(This article belongs to the Special Issue Electroanalytical Trace Metal Quantification and Speciation)
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