Method of scavenging hydrogen sulfide

A method for reducing the amount of hydrogen sulfide in a hydrogen sulfide-containing aqueous medium without the formation of a solid reaction product, wherein said aqueous medium has a pH from neutral to alkaline, which method comprises adding to the aqueous medium an effective amount for the purpose of a glyoxal and a formaldehyde in combination, wherein said glyoxal and said formaldehyde are each added in an amount to provide a glyoxal/formaldehyde:hydrogen sulfide molar ratio from about 0.3:1 to about 3:1.

A method for reducing the amount of hydrogen sulfide in a hydrogen sulfide-containing aqueous medium without the formation of a solid reaction product, wherein said aqueous medium has a pH from neutral to alkaline, which method comprises adding to the aqueous medium an effective amount for the purpose of a glyoxal and a glutaraldehyde in combination, wherein said glyoxal and said glutaraldehyde are each added in an amount to provide a glyoxal/glutaraldehyde:hydrogen sulfide molar ratio from about 0.3:1 to about 3:1.

A method for reducing the amount of hydrogen sulfide in a hydrogen sulfide-containing wet gaseous aqueous medium without the formation of a solid reaction product, wherein said aqueous medium has a pH from neutral to alkaline, which method comprises contacting said wet gaseous medium with an effective amount for the purpose of a glyoxal.