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)?

BennettWardman (talk)18:28, 3 April 2020

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)16:16, 28 April 2020