Patent ID: 8580711

Claim:
A method of decreasing or preventing sub-surface geological matter contamination resulting from exposing an agricultural substrate to an agrochemical, the method comprising: exposing the agricultural substrate to a composition which comprises the agrochemical and at least one transforming agent capable of decreasing or eliminating concentration of the agrochemical which contacts a sub-surface geological matter, thereby decreasing or preventing sub-surface geological matter contamination by the agrochemical, wherein: said at least one agrochemical comprises a halogenated organic pesticide; and said transforming agent is a porphyrinogenic organometallic complex, wherein said at least one agrochemical and said transforming agent are selected such that said transforming agent co-migrates and becomes co-distributed with said at least one agrochemical within and throughout said sub-surface geological matter, and wherein prior to entering said sub-surface geological matter, said at least one transforming agent exhibits no activity for said decreasing or eliminating concentration of said at least one agrochemical, and within said sub-surface geological matter, said at least one transforming agent exhibits activity for said decreasing or eliminating concentration of said at least one agrochemical which contacts said sub-surface geological matter, wherein said decreasing or eliminating concentration of said at least one agrochemical comprises reductive dehalogenation of said at least one agrochemical, and said reductive dehalogenation is effected under reducing conditions in said sub-surface geological matter and is not effected under oxidizing conditions of a top or uppermost surface layer of the ground or earth.