Reagent system for remediating mine waste and other solid waste contaminated with heavy metals
AssigneeHMR Solutions, Inc.
InventorKarl William Yost
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Abstract
A reagent system for treating heavy metal-contaminated materials is provided and includes an oxidizer, a soluble phosphate, and an alkaline hydroxide source, such as a caustic soda or lime. A method of treating mine waste bearing one or more heavy metals is also provided and includes the step of admixing a reagent system with heavy metal-containing material to preferentially reduce the leachability of heavy metals and form precipitates and complexes of low metal solubility that remain stable within the host solid matrix for long durations in acidic and abrasive conditions.
Claims5
A reagent system for treating solid waste contaminated with one or more heavy metals, comprising a combined blend of:
- an oxidizer,
- a water soluble phosphate selected from the group consisting of phosphoric acid, trisodium phosphate, phosphate salts containing calcium, and mixtures thereof, and
- an alkali hydroxide or hydroxide source.
Dependencies are inferred from the claim text.