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

U.S. Epa

Kirk Gerald Scheckel

Jennifer Lynn Goetz

Matthew R Noerpel

Ranju R Karna

Todd Peter Luxton

Karen D Bradham

Charles R Partridge

David James Thomas

James A Ryan

Tyler Dale Sowers

Christopher A Impellitteri

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.

Ruthenium compounds, either alone or in combination with other remediating compounds, can be used to oxidize, remove and sequester contaminants in water and soil or sediments.

Method for removing contaminants from water using ruthenium based contaminant sorbents and oxidizers

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Cincinnati, OH, United States of America

Kirk Gerald Scheckel