Abstract
Seasonal variations of water chemistry occurred in acid mine drainage receiving mine and leachate water. Sulfate and metal concentrations were low in winter but high in spring and summer. Mine waters were highly acidic (up to pH 3.4) in nature with high concentrations of manganese, copper and zinc but high electrical conductivity and sulfate in leachate. The blue and brownish yellow precipitates were formed under different chemical environments of acid mine drainage. Brownish yellow (Munsell color 7.5YR 8/12), blue (Munsell color 2.5B 9/7) and light blue (Munsell color 2.5B 9/3) precipitates deposited on the stream bottom receiving acid mine water. The brownish yellow precipitates formed in the acid mine water, whereas the blue and light blue precipitates formed in the leachate water. The brownish yellow precipitates consisted mainly of ferrihydrite, whereas the blue and light blue precipitates consisted of glaucocerinite and/or woodwardite.
| Original language | English |
|---|---|
| Pages (from-to) | 2199-2209 |
| Number of pages | 11 |
| Journal | Environmental Earth Sciences |
| Volume | 69 |
| Issue number | 7 |
| DOIs | |
| State | Published - Aug 2013 |
Keywords
- Acid mine drainage
- Blue precipitates
- Ferrihydrite
- Glaucocerinite
- Woodwardite