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- Title
A comparison of charcoal- and slag-based constructed wetlands for acid mine drainage remediation.
- Authors
Sheridan, Craig; Harding, Kevin; Koller, Edward; De Pretto, Antonio
- Abstract
Subsurface-flow constructed wetlands (CW) with charcoal- or slag-based bed matrices were investigated for their potential use in remediating acid mine drainage (AMD). A CW is effectively a reactor in which some components of the wastewater are broken down by the organisms occurring within the CW, whilst others may be degraded by physico-chemical processes or a combination thereof. Two 200 l small-scale CWs were built at the University. Commercially available charcoal and <19 mm basic oxygen furnace (BOF) slag were used as the bed matrices and the units were planted with a variety of plants. The units were exposed to an artificial AMD. The results showed that the systems removed almost all soluble iron and more than 75% of the sulphate. Both CWs were able to increase the pH of the AMD.
- Subjects
CONSTRUCTED wetlands; ACID mine drainage purification; BASIC oxygen furnaces; IRON slag; SANITARY engineering
- Publication
Water SA, 2013, Vol 39, Issue 3, p369
- ISSN
0378-4738
- Publication type
Article
- DOI
10.4314/wsa.v39i3.4