M(II) transfer across a liquid-liquid microinterface facilitated by a complex formation with 8-Hydroxyquinoline: Application to quantification of Pb(II), Cd(II) and Zn(II) alone or in mixture in effluents
| Autor: | Annie Chaussé, Afef Mastouri, Nizar Bellakhal, Sophie Peulon |
|---|---|
| Přispěvatelé: | Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement (LAMBE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université d'Évry-Val-d'Essonne (UEVE)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées et de Technologie [Tunis] (INSAT), Université Paris-Seine-Université Paris-Seine-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Cyclic voltammetry
Square wave voltammetry General Chemical Engineering Analytical chemistry chemistry.chemical_element Chemical detection Effluents 02 engineering and technology Zinc Electrochemistry 01 natural sciences chemistry.chemical_compound Industrial effluent Phase (matter) Zinc compounds Electrochemical process Detection limit Cadmium Sewage Cadmium compounds 010401 analytical chemistry Stationary currents Aqueous two-phase system 8-Hydroxyquinoline 021001 nanoscience & nanotechnology 0104 chemical sciences Assisted transfer Zinc ions chemistry Heavy metals Lead Mixtures 8-Hydroxyquinolinol (8-HQ) [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] 0210 nano-technology Micro-ITIES |
| Zdroj: | Electrochimica Acta Electrochimica Acta, 2014, 130, pp.818-825. ⟨10.1016/J.ELECTACTA.2014.03.073⟩ Electrochimica Acta, Elsevier, 2014, 130, pp.818-825. ⟨10.1016/J.ELECTACTA.2014.03.073⟩ |
| ISSN: | 0013-4686 |
| Popis: | International audience; For the first time, the assisted transfer of Pb(II) across a water/1,2-Dichloroethane (DCE) microinterface was investigated in the presence of 8-Hydroxyquinoline (named also oxine or 8-HQ) in the organic phase. A monocharged complex was formed in the aqueous phase and then transferred in the organic phase. A good relationship was obtained between currents and Pb(II) concentrations in the 10−4 to 5 10−3M range and 10−5 to 6 10−5M range using cyclic voltammetry and square wave voltammetry respectively. In presence of other heavy metals such as Cd(II) and Zn(II), only one electrochemical process is observed regardless of the mixture. Moreover, stationary currents increase in direct linear relation with the sum of M(II) concentrations added in water, allowing an overall detection of heavy metals. This result indicates that this method can be very interesting for monitoring all toxic metals in effluents. The limit of detection was found equal to 0.2ppm for lead. This value allows us to reach levels significant for industrial effluents, in comparison to the limits fixed by the French ministry of ecology for lead, cadmium and zinc to 0.5ppm, 0.2ppm and 2.0ppm respectively. This study highlights the real interest of devices based on a liquid-liquid microinterface. |
| Databáze: | OpenAIRE |
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