Influence of inorganic complexes on the transport of trace metals through permeation liquid membrane

Article Article scientifique Article Influence of inorganic complexes on the transport of trace metals through permeation liquid membrane eng 2009-07 author Bayen Stéphane CABE, University of Geneva, Sciences II, 30 Quai Ernest Ansermet, CH 1211, Geneva 4, Switzerland. bayen@cebios.fr 626757 author Gunkel Grillon Peggy 564897 author Worms Isabelle 0000-0002-7498-0078 542783 Forel Communs (FOREL) author Martin Michel 24967 Administration de la faculté des sciences (SIAD) author Buffle Jacques 24673 Administration de la faculté des sciences (SIAD) 104-110 10.1016/j.aca.2009.04.040 19523562 0003-2670 https://linkinghub.elsevier.com/retrieve/pii/S0003267009006059 Under specific conditions (pH, concentrations), trace metals may form, with environmental inorganic ligands, neutral complexes which, in principle, might diffuse passively through biological membranes or influence the response of (bio)analytical sensors for trace metals based on permeation liquid membrane (PLM). In this study, metal (Cu, Cd, Pb) transport through the planar PLM device was evaluated in the presence of major environmental inorganic ligands such as sulfate, carbonate and chloride under conditions where neutral complexes may be formed (up to 73% of neutral metal complex in the solution). In the presence of sulfate, comparison of predicted and experimental PLM fluxes of Cu, Pb and Cd, suggests that passive transport of neutral sulfate-metal complexes does not occur. This was confirmed by comparing fluxes in the presence and absence of carrier. In the presence of carbonate (for Cd, Cu and Pb) and chloride (for Pb and Cd), however, experimental PLM fluxes were greater than predicted (up to 4 and 25 times in the presence of carbonate and chloride, respectively), but experiments in the absence of carrier in the membrane revealed that no passive transport of neutral complexes (MCl(2) or MCO(3)) occurs through PLM. A possible mechanism is discussed. In parallel to the experiments with PLM, the influence of carbonate on the internalization fluxes of Cu(II) and Pb(II) by the freshwater algae, Chlamydomonas reinhardtii, was assessed. Similarly to the results of PLM, the fluxes of these two metals were larger than expected (based on the free metal ion activity model). Thus, even though PLM and bioaccumulation mechanisms are certainly different, similar unexpected behaviours occur for the metal transport through the PLM and biological membrane of C. reinhardtii, in the presence of carbonate. Dewey 550 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false 752 Environmental Biogeochemistry and Ecotoxicology Analytica chimica acta 646 1-2 284606cf-bb3c-4747-820f-ebc93fa14ff4 Erratum Restricted 1-s2.0-S0003267011014188-main.pdf 122099 application/pdf e637df489ef98556fe5ba0242a12999dc19d8cc930639dd59d13e69ea3e59392 fb9c87a0-0d27-472a-938b-8dd10b585c09 Article (Published version) Restricted 1-s2.0-S0003267009006059-mainext.pdf 683144 application/pdf d87b0ad6122c2c76f4bc5b4de67a2fa1b34fef4a8305bbaaaeaa2bbcc98fc4f5 Erratum to “Influence of inorganic complexes on the transport of trace metals through permeation liquid membrane” [Anal. Chim. Acta 646 (2011) 104–110] 10.1016/j.aca.2011.10.038 restrictedAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

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Influence of inorganic complexes on the transport of trace metals through permeation liquid membrane	Analytica chimica acta			2009	3	0

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Gunkel Grillon, Peggy