Methods for decontaminating soil

Details Methods for decontaminating soil Methods for decontaminating soil

1983-06-06

1984-05-08

Lander, Ferris H.

Chemistry: molecular biology and microbiology

Process of utilizing an enzyme or micro-organism to destroy...

Cleaning using a micro-organism or enzyme

435170, 435243, 435874, 549349, 568755, 71903, D06M 1600

Patent

active

044475411

ABSTRACT:
A reagent mixture is admixed with soil to first desorb and then hydrolyze and thereby increase the biodegradability of a toxic or otherwise hazardous polyhalogenated organic compound with which the soil is contaminated. Essential constituents of the reagent mixture are: (1) an alkali metal hydroxide, an alkali metal hydroxide/alcohol or alkali metal hyroxide/glycol mixture, or an alkoxide; and (2) a sulfoxide catalyst. The hydrolyzed compounds can be biologically degraded into compounds which pose little if any hazard to the environment or its inhabitants by naturally occurring or artifically introduced Pseudomonas sp. and other microorganisms with adjustment of soil pH (and perhaps orther parameters) to provide a viable environment for the bacteria being carried out after the chemical treatment if inoculation with bacterial cultures is employed. If a mixture of non-biodegradable and biodegradable contaminants is present, a preliminary biodegradation step can be optionally used to rid the contaminated area of the latter before hydrolysis of the contaminated soil with the reagent mixture is undertaken.

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