M.  Osawaldo Bustamante, Andres  M. Muñoz, Luis  F. Duque, Martin  E. Espitia, Mikel  Hurtado-Morales, 
    Physical and Electrochemical Parameters Study in Kaolin’s Processing,
    Journal of Engineering and Applied Sciences,
    Volume 15,Issue 12,
    2020,
    Pages 2536-2541,
    ISSN 1816-949x,
    jeasci.2020.2536.2541,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2020.2536.2541)
    Abstract: In this research, a characterization of the
chemical bleaching process of Colombian kaolin by
potentiometric an galvanometric measures is shown.
Three samples from La Unión, Antioquia (Colombia),
were tested in laboratory taking into account the effect of
the amount of reducing agent (Na<sub>2</sub>SO<sub>4</sub>) and the resident
times. Phenomena description such as the variation in
electrochemical potential, iron concentration in solution
and the whiteness index evolution, contributes to the
phenomenological analysis of kaolin processing. These
results are important for future research works appointing
to efficiency of Colombian kaolin blenching that make
possible a reduction in precipitated iron species in mineral
surfaces.
    Keywords: Kaolin;bleaching;electrochemical potential;potentiometric;galvanic measures