Date of Award

3-2000

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Systems Engineering and Management

First Advisor

Charles A. Bleckmann, PhD

Abstract

Maintaining safe flight operations, military and civilian, in cold weather requires the use of de-icing fluids. Glycols, the primary component of de-icers, have been extensively studied. Water and additives such as corrosion inhibitors and other performance enhancing chemicals make up the remaining portion of de-icing fluids. Little research has been conducted on the additives, but several are suspected toxins to microorganisms, therefore the EPA regulates the disposal of spent de-icing fluids. Tolyltriazole, a corrosion inhibitor found in de-icing fluids, is a suspected human carcinogen. It is also known to be moderately toxic to microorganisms based on Microtox results. The purpose of this research was to determine whether tolyltriazole is toxic to isolated and/or consortia of common soil microorganisms found in soil samples and cultivated using propylene glycol and yeast extract.

AFIT Designator

AFIT-GEE-ENV-00M-13

DTIC Accession Number

ADA377117

Comments

The author's Vita page is omitted.

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