applied hardwood-
derived biochar to multi-element (As, Cu, Cd, and Zn) contaminated
soil. Interestingly, Cu and As are mobilized, whereas
Cd and Zn are immobilized in soils amended with biochar as compared
to un-amended soil. Copper leaching is associated with high
dissolved organic C contents at the increased pH induced by applying
biochar, whereas As leaching was attributed to increasing the