United States Government, As Represented by the Administrator of the U.S. Epa

Ranju R Karna

Kirk Gerald Scheckel

David James Thomas

Matthew R Noerpel

Charles R Partridge

Jennifer Lynn Goetz

Karen D Bradham

Todd Peter Luxton

Tyler Dale Sowers

Methods and systems are provided for treating a contaminated environmental medium. In one example, the treatment includes adding a first jarosite-group mineral to the contaminated environmental medium to form a wet mixture under a set of conditions. The set of conditions is maintained over a duration of time to expedite precipitation of a second jarosite-group mineral, the second jarosite-group mineral incorporating contaminant cations and contaminant anions into a structure of the second jarosite-group mineral. The first jarosite-group mineral is added in situ at a contamination site.

Method for sequestering ions in an environmental matrix

Methods and systems are provided for treating a contaminated environmental medium. In one example, the treatment includes adding a salt to the contaminated environmental medium to form a slurry. The slurry is heated to irreversibly precipitate a jarosite-group mineral incorporating contaminant cations and contaminant anions into its structure.

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Clinton, MS, United States of America

Ranju R Karna