Practice exam #3 - QUESTION 2
Fragment of a discussion from Course talk:APBI200
b) Could you also add organic matter or a clay with high SSA like montmorillonite that would increase the CEC, creating a bigger buffering capacity. Also not sure how you would do it but could you increase the base forming cations (such as Ca, maybe that's what lime does)?
Bennett, increasing the buffering capacity would have minimal impact on the extreme acidity produced by the oxidation of Fe-sulfides (e.g., acid mine drainage). See Blaise's suggestion below.
SandraBrown (talk)