Direct measurement of the adsorption kinetics of 2-Mercaptobenzothiazole on a microcrystalline copper surface

  • Ramírez-Cano J
  • Veleva L
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Abstract

The adsorption on copper of 2-Mercaptobenzothiazole (2-MBT), a<br />heterocyclic compound member of the tiazole family, has been<br />investigated at different concentrations (1x10(-1) to 1x10(-6) M) in<br />water, employing the Electrochemical Quartz Crystal Microbalance (EQCM).<br />The frequency response over time was obtained for each concentration,<br />showing a defined exponential behavior at higher concentrations<br />(1x10(-1), 1x10(-2) and 1x10(-3) M), which was fitted to the Langmuir<br />adsorption isotherm with a good correlation coefficients (R-2=0.91 to<br />0.98). Surface coverage (theta) was calculated and found to be in the<br />order of 0.50 to 0.01 for 2-MBT high concentrations. The free energy of<br />adsorption was Delta G(ads)=-5.59 kJ mol(-1), corresponding to<br />physisorption process, probably of electrostatic nature of the<br />interaction between 2-MBT and copper surface in aqueous solution.

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Ramírez-Cano, J. A., & Veleva, L. (2016). Direct measurement of the adsorption kinetics of 2-Mercaptobenzothiazole on a microcrystalline copper surface. Revista de Metalurgia, 52(1), e064. https://doi.org/10.3989/revmetalm.064

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