| Abstract
| - Samples of nine different formulations of aircraft deicerand antiicer fluids (ADAF) were screened for the presenceof selected surfactants. Nonylphenol ethoxylates (NPnEO)were identified in three ADAF formulations, octylphenolethoxylates were identified in two formulations, and sixformulations contained alcohol ethoxylates. A preliminaryfield study was conducted at General Mitchell InternationalAirport, Milwaukee, WI, to quantify NPnEO (n = 1−15)and one of its byproducts, nonylphenol (NP), in airport runoff.Samples were collected from two airport outfalls, fromthe receiving stream, and from an upstream reference siteduring intensive ADAF application events. NPnEO wasmeasured at concentrations up to 1190 μg/L in airport outfallsamples, up to 77 ug/L in samples from the receivingstream and less than 5.0 μg/L from the upstream reference.Concentrations of glycol and other ADAF-related constituents, including NPnEO, were reduced by ∼1 order ofmagnitude between the outfall sites and the receivingstream site; however, concentrations of NP in the receivingstream remained similar to those from the outfalls(<0.04 μg/L at the upstream reference, 0.98 and 7.67 μg/Lat outfalls, and 3.89 μg/L in the receiving stream). Thefield data suggest that NP is generated through degradationof NPnEO from airport runoff.
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