1
|
Pinheiro JP, Rotureau E. 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. Molecules 2023; 28:molecules28062831. [PMID: 36985802 PMCID: PMC10056914 DOI: 10.3390/molecules28062831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/17/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
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 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.
Collapse
Affiliation(s)
- José Paulo Pinheiro
- Université de Lorraine, CNRS, Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), F-54000 Nancy, France
| | - Elise Rotureau
- Université de Lorraine, CNRS, Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), F-54000 Nancy, France
| |
Collapse
|
2
|
The Effect of Supramolecular Humic Acids on the Diffusivity of Metal Ions in Agarose Hydrogel. Molecules 2022; 27:molecules27031019. [PMID: 35164280 PMCID: PMC8838780 DOI: 10.3390/molecules27031019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/24/2022] [Accepted: 01/28/2022] [Indexed: 12/04/2022] Open
Abstract
Humic acids are known as natural substances of a supramolecular nature. Their self-assembly ability can affect the migration of heavy metals and other pollutants in nature. The formation of metal-humic complexes can decrease their mobility and bioavailability. This study focuses on metal ions diffusion and immobilization in humic hydrogels. Humic acids were purchased from International Humic Substances Society (isolated from different matrices—peat, soil, leonardite, water) and extracted from lignite mined in Czech Republic. Copper(II) ions were chosen as a model example of reactive metals for the diffusion experiments. The model of instantaneous planar source was used for experimental data obtained from monitoring the time development of copper(II) ions distribution in hydrogel. The effective diffusion coefficients of copper(II) ions showed the significant dependence on reaction ability of humic hydrogels. Lower amounts of the acidic functional groups caused an increase in the effective diffusion coefficient. In general, diffusion experiments seem to act as a valuable method for reactivity mapping studies on humic substances.
Collapse
|
3
|
Guo H, Kurokawa T, Takahata M, Hong W, Katsuyama Y, Luo F, Ahmed J, Nakajima T, Nonoyama T, Gong JP. Quantitative Observation of Electric Potential Distribution of Brittle Polyelectrolyte Hydrogels Using Microelectrode Technique. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00037] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Honglei Guo
- Graduate
School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Takayuki Kurokawa
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
- Global
Station for Soft Matter, Global Institution for Collaborative Research
and Education, Hokkaido University, Sapporo, Japan
| | | | - Wei Hong
- Global
Station for Soft Matter, Global Institution for Collaborative Research
and Education, Hokkaido University, Sapporo, Japan
- Department
of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Yoshinori Katsuyama
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Feng Luo
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Jamil Ahmed
- Graduate
School of Life Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Tasuku Nakajima
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
- Global
Station for Soft Matter, Global Institution for Collaborative Research
and Education, Hokkaido University, Sapporo, Japan
| | - Takayuki Nonoyama
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
- Global
Station for Soft Matter, Global Institution for Collaborative Research
and Education, Hokkaido University, Sapporo, Japan
| | - Jian Ping Gong
- Faculty
of Advanced Life Science, Hokkaido University, Sapporo, 060-0810, Japan
- Global
Station for Soft Matter, Global Institution for Collaborative Research
and Education, Hokkaido University, Sapporo, Japan
| |
Collapse
|