초록 ▼

Compositions for and method of degrading organic chemicals in soil. The composition is a nutrient medium serving as a substrate for micro-organisms in the soil, preferably containing a major proportion of a source of carbon skeleton and energy, a macronutrient component preferably including nitrogen

Compositions for and method of degrading organic chemicals in soil. The composition is a nutrient medium serving as a substrate for micro-organisms in the soil, preferably containing a major proportion of a source of carbon skeleton and energy, a macronutrient component preferably including nitrogen and other macronutrients, and a micronutrient component, preferably also a complexing agent and a vitamin/co-factor component. This nutrient material is added to soil, e.g. soil contaminated by a pesticide, to cause proliferation of micro-organisms which are effective, or which develop effectiveness to degrade the organic chemicals. Preferably the micro-organisms are those naturally present in the soil but useful micro- organisms may be added with the nutrient medium.

대표청구항 ▼

1. A method of degrading an organic chemical in soil, which organic chemical is toxic to vegetation, such chemical or a precursor thereof having been added to the soil or to plants grown in the soil as a herbicide or pesticide, said method comprising:(a) mixing with the soil an aqueous nutrient in q

1. A method of degrading an organic chemical in soil, which organic chemical is toxic to vegetation, such chemical or a precursor thereof having been added to the soil or to plants grown in the soil as a herbicide or pesticide, said method comprising:(a) mixing with the soil an aqueous nutrient in quantity and under such conditions that it causes rapid proliferation of microorganisms added to or naturally present in the soil which directly attack and degrade such organic chemical or which acquire the ability to do so; (b) such mixing being under conditions which cause rapid proliferation of the microorganisms and of microorganisms which are capable of using the chemical as a nutrient; and (c) allowing such proliferation to continue until the added nutrient is depleted and the microorganisms attack and degrade the chemical as a nutrient source, wherein the nutrient comprises: from about 25.0 to about 70.0 weight percent water soluble carbon skeleton/energy component, the carbon skeleton energy component selected from the group consisting of mannose, lactose, dextrose, arythrose, fructose, fucose, galactose, glucose, gulose, maltose, raffinose, ribose, ribulose, rutinose, saccharose, stachyose, trehalose, xylose, xylulose, adonose, amylose, arabinose, fructose phosphate, fucose-p, galactose-p, glucose-p, lactose-p, maltose-p, mannose-p, ribose-p, ribulose-p, xylose-p, xylulose,-p, deoxyribose, adonitol, galactitol, glucitol, maltitol, mannitol, mannitol-p, ribitol, sorbitol, sorbitol-p, xylitol and mixtures thereof; from about 0.005 to about 70.0 weight percent of a complexing agent selected from the group consisting of calcium lignosulfonate, sodium lignosulfonate, ammonium lignosulfonate, potassium lignosulfonate and mixtures thereof; a water soluble nitrogen source in an amount effective to provide from about 0.3 to about 15.0 weight percent nitrogen in the composition; and a water soluble phosphorous nutrient source in an amount effective to provide from about 0.2 to about 5.00 weight percent phosphorous.