Figure 2From: Dynamics in leachate chemistry of Cu-Au tailings in response to biochar and woodchip amendments: a column leaching studyA box plot showing the change of pH of the three treatments in column leaching. EHM-Char, EHM tailings amended with 10% biochar; EHM-Wood, EHM tailings amended with 20% woodchips. The number following the treatment labels indicates for the number of leaching cycle. Only the first and sixth cycles were compared here.Back to article page