Acid-mine sludge may work in a soil blend—but not as soil itself
WHAT THE EVIDENCE SAYS
Fifteen small replicated West Virginia reclamation plots compared topsoil with 25%, 50%, 75% and 100% acid mine drainage treatment-sludge mixes. At later monitoring, the 25% and 50% blends reached at least a 70% revegetation-cover benchmark; pure sludge did not. Sampled sludge chemistry and metals varied.
WHY IT MATTERS / OUR READ
Circular reuse of treatment residuals deserves limited field testing and metal-bioavailability assessment before incorporation into wider reclamation specifications.
CAVEATS / UNCERTAINTY
These are short-duration small plots, not regulatory safety demonstrations or long-term food-chain and groundwater studies. Sludge composition can vary widely.
SOURCE
Mining, Metallurgy & Exploration — Kerr et al., 29 October 2026
View original evidence ↗
West Virginia reclamation microplots achieved vegetation cover goals under some waste blends.
Read the Wild Lands assessment →