US Patent 7846408 Compositions, methods, and systems for managing total sulfide

Certain exemplary embodiments can involve contacting a predetermined portion of a medium and a reaction product resulting from a reaction between predetermined reactants that can include a predetermined active ferric chelate and a nitrate/nitrite, the contacting occurring at a pH of approximately 6 to approximately 8, the contacting effective to oxidize at least a portion of a sulfide contaminant associated with the predetermined portion of the medium.