Organic Amendments and Earthworm Addition Improve Properties of Nonacidic Mine Tailings
Figure 4
Microfabric of mine tailings amended with organic residues with or without earthworms. After 29 weeks, the organic residues (white down arrow) were intimately mixed in (a) T2-W (10% biosolids, 10% pulp sludge, with earthworms), compared to (c) discrete unit showing cracked pattern in T2-WO (10% biosolids, 10% pulp sludge, without earthworms). Close-up images of sections marked by (black up arrow) in (a) and (c) show the (b) intimate mixing of organic residues (white down arrow) with inorganic materials (white up arrow) and (d) the cracked pattern of organic residues (white down arrow) not mixed with inorganic materials.
