Sulfidation rate constant

Describes the rate at which a metal-based nanoparticle reacts with available sulfide to form metal sulfides. 




Used for






Where \(F_{CuO,t}\) is the remaining fraction of \(CuO\) at time \(t\) of the reaction of \(CuO\) with \(HS^{-}\), \(k\) is the Pseudo first-order reaction rate coefficient and \(t\) is the time. Pseudo first-order reaction rate coefficient \(k\) is defined as:

k = 6.4 \text{ mM}^{-1} \text{min}^{-1}

k' = k \cdot [HS^-]

  Colorimetric method using Zincon       X-ray absorption spectroscopy


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Read also


A. Gogos, B. Thalmann, A. Voegelin and R. Kaegi, Sulfidation kinetics of copper oxide nanoparticles, Environmental Science: Nano, 2017, 4, 1733-1741.

B. Thalmann, A. Voegelin, E. Morgenroth and R. Kaegi, Effect of humic acid on the kinetics of silver nanoparticle sulfidation, Environmental Science: Nano, 2016, 3, 203-212.

R. Kaegi, A. Voegelin, C. Ort, B. Sinnet, B. Thalmann, J. Krismer, H. Hagendorfer, M. Elumelu and E. Mueller, Fate and transformation of silver nanoparticles in urban wastewater systems, Water research, 2013, 47, 3866-3877.



Alexander Gogos

EAWAG, Switzerland