Nosal-Wiercinska, AgnieszkaGrochowski, MariuszWisniewska, MalgorzataTyszczuk-Rotko, KatarzynaYilmaz, SelehattinYagmur, SultanSaglikoglu, Gulsen2025-01-272025-01-2720150263-61742048-4038https://doi.org/10.1260/0263-6174.33.6-8.553https://hdl.handle.net/20.500.12428/2768714th Polish-Ukrainian Symposium on Theoretical and Experimental Studies of Interfacial Phenomena and their Technological Applications -- SEP 09-13, 2014 -- Zakopane, POLANDIn this study, we compared the adsorption of methionine, cysteine and cystine at the mercury/chlorate (VII) interface. Changes in the surface tension with the potential of the zero charge gamma(z) and relative surface excess Gamma' of methionine, cysteine and cystine as a function of their concentration indicate that the adsorption of the studied amino acids increases in the order of methionine > cystine > cysteine. For all the systems examined, linear dependences ln[x(1-Theta)/Theta = f(Theta)] (Frumkin isotherm) and ln (Gamma'/c) = f (Gamma') (virial isotherm) were obtained. Changes in the adsorption parameters as a function of the supporting electrolyte concentration indicate the competitive adsorption of amino acids and ClO4- ions and electrostatic interactions between the water dipoles and adsorbates in the double layer.eninfo:eu-repo/semantics/openAccessWater ActivityMercury-ElectrodesAdsorbed LayersCysteineCystinePolyelectrolytesThioureaConference Object336-855355810.1260/0263-6174.33.6-8.553Q4WOS:0003618498000062-s2.0-84955483550Q2