2026-04-13T06:45:34Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/201842024-06-18T13:56:48Zcom_2072_452955com_2072_2054col_2072_453073

A Polymer Inclusion Membrane for Sensing Metal Complexation in Natural Waters Alcalde Saña, Berta Anticó i Daró, Ma. Enriqueta Fontàs Rigau, Clàudia Agencia Estatal de Investigación Membranes (Tecnologia) Membranes (Technology) Aigua -- Contaminació Water -- Pollution Metal speciation studies are of great importance in assessing metal bioavailability in aquatic environments. Functionalized membranes are a simple tool to perform metal chemical speciation. In this study, we have prepared and tested a polymer inclusion membrane (PIM) made of the polymer cellulose triacetate (CTA), the extractant di-(2-ethylhexyl) phosphoric acid (D2EHPA), and the plasticizer 2-nitrophenyloctyl ether (NPOE) as a sensor for Zn and Cu complexation studies. This PIM, incorporated in a device with an 0.01 M HNO3 receiving solution, is shown to effectively transport free metal ions, and it is demonstrated that the presence of ligands that form stable complexes with divalent metallic ions, such as ethylenediaminetetraacetic acid (EDTA) and humic acid (HA), greatly influences the accumulation of the metals in the receiving phase due to the increasing metal fraction complexed in the feed phase. Moreover, the effect of major ions found in natural waters has been investigated, and it is found that the presence of calcium did not decrease the accumulation of either Zn or Cu. Finally, the PIM sensor has been used successfully to evaluate metal complexation in a river water affected by Zn pollution This research was funded by the Ministerio de Ciencia, Innovación y Universidades (MCIU) grant number PID2019-107033GB-C22/AEI/10.13039/501100011033 2021-11-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/20184 http://hdl.handle.net/10256/20184 eng info:eu-repo/semantics/altIdentifier/doi/10.3390/app112110404 info:eu-repo/semantics/altIdentifier/eissn/2076-3417 PID2019-107033GB-C22 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107033GB-C22/ES/HERRAMIENTAS DE MUESTREO INNOVADORAS Y MUESTREADORES PASIVOS BASADOS EN MEMBRANAS DE INCLUSION DE POLIMEROS PARA MONITORIZACION, DETECCION Y DISPONIBILIDAD DE CONTAMINANTES/ Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf MDPI (Multidisciplinary Digital Publishing Institute) Applied Sciences, 2021, vol. 11, núm. 21, p. 10404 Articles publicats (D-Q)