Adsorption of Selected Amino Acids at the Mercury/Aqueous Solution Interface from the Chlorate (VII) and Its Dependence on the Supporting Electrolyte Concentration
| Autor: | Agnieszka Nosal-Wiercińska, Mariusz Grochowski, Małgorzata Wiśniewska, Katarzyna Tyszczuk-Rotko, Selehattin Yilmaz, Sultan Yagmur, Gulsen Saglikoglu, Susan Yanik |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Adsorption Science & Technology, Vol 33 (2015) |
| Druh dokumentu: | article |
| ISSN: | 0263-6174 2048-4038 |
| DOI: | 10.1260/0263-6174.33.6-8.553 |
| Popis: | In 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 γ z and relative surface excess Γ' 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[×(1–Θ)/Θ = f(Θ)] (Frumkin isotherm) and ln (Γ/c) = f(Γ') (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 ClO 4 − ions and electrostatic interactions between the water dipoles and adsorbates in the double layer. |
| Databáze: | Directory of Open Access Journals |
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