000126851 001__ 126851
000126851 005__ 20241125101154.0
000126851 0247_ $$2doi$$a10.1007/s00604-023-05780-5
000126851 0248_ $$2sideral$$a134190
000126851 037__ $$aART-2023-134190
000126851 041__ $$aeng
000126851 100__ $$0(orcid)0000-0003-4599-796X$$aVidal, Juan C.$$uUniversidad de Zaragoza
000126851 245__ $$aDetection, quantification, and characterization of polystyrene microplastics and adsorbed bisphenol A contaminant using electroanalytical techniques
000126851 260__ $$c2023
000126851 5060_ $$aAccess copy available to the general public$$fUnrestricted
000126851 5203_ $$aThe potential applications of electroanalytical techniques for the quantification and size characterization of nonelectroactive polystyrene microplastics is reported, in addition to characterizing the kinetics of adsorption of bisphenol A on these polystyrene microparticles. The individual adsorption events of very diluted polystyrene microparticles dispersions on glassy-carbon microelectrodes produce the blocking of the charge transfer of a mediator (ferrocene-methanol) thus decreasing the current of the recorded chronoamperogram in a stepwise manner. The magnitude of the current steps are in the order of pA values and can be related to the diameter of the plastic microparticles in the size range 0.1 to 10 µm. The frequency of the current steps in the domain time used (120 s) allows to quantify the number concentration of these microparticles in the range 0.005 to 0.500 pM. Electrochemical impedance spectroscopy confirms the adsorption of the polystyrene microplastics on carbon microelectrodes (and to a lesser extent on platinum microelectrodes) under the same experimental conditions as above. On the other hand, the adsorbed microplastics become concentrators of other pollutants found in the environment. The sensitive differential-pulse voltammetry determination of bisphenol A (linear range 0.80–15.00 µM; detection limit 0.24 µM) was used together with a simple separation procedure for studying the adsorption of bisphenol A on polystyrene microparticles. The adsorption capacity (mg of bisphenol A retained per g of the polystyrene microplastics) decreased from approximately 5.7 to 0.8 mg g−1 with increasing dosages of polystyrene microparticles from 0.2 to 1.6 g l−1. The adsorption isotherms were modeled resulting in a monolayer of bisphenol A adsorbed on the microplastics (i.e., best fitted to a Langmuir model).
000126851 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FEDER/E29-17R$$9info:eu-repo/grantAgreement/ES/MICINN/PID2021-123203OB-I00
000126851 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000126851 590__ $$a5.4$$b2023
000126851 592__ $$a0.848$$b2023
000126851 591__ $$aCHEMISTRY, ANALYTICAL$$b15 / 106 = 0.142$$c2023$$dQ1$$eT1
000126851 593__ $$aAnalytical Chemistry$$c2023$$dQ1
000126851 594__ $$a9.8$$b2023
000126851 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000126851 700__ $$0(orcid)0000-0003-1727-8757$$aMidón, Javier
000126851 700__ $$aVidal, Ana B.
000126851 700__ $$aCiomaga, Dragos
000126851 700__ $$0(orcid)0000-0002-4169-0357$$aLaborda, Francisco$$uUniversidad de Zaragoza
000126851 7102_ $$12009$$2750$$aUniversidad de Zaragoza$$bDpto. Química Analítica$$cÁrea Química Analítica
000126851 773__ $$g190, 6 (2023), 203 [10 pp.]$$pMikrochim. acta$$tMicrochimica Acta$$x0026-3672
000126851 8564_ $$s1704678$$uhttps://zaguan.unizar.es/record/126851/files/texto_completo.pdf$$yVersión publicada
000126851 8564_ $$s2496014$$uhttps://zaguan.unizar.es/record/126851/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000126851 909CO $$ooai:zaguan.unizar.es:126851$$particulos$$pdriver
000126851 951__ $$a2024-11-22-12:08:16
000126851 980__ $$aARTICLE