You are here:
RELEASE OF CHEMICALS FROM CONTAMINATED SOILS. (R822721C529)
Citation:
Williamson, D. G., R. C. Loehr, AND Y. Kimura. RELEASE OF CHEMICALS FROM CONTAMINATED SOILS. (R822721C529). JOURNAL OF SOIL CONTAMINATION. American Chemical Society, Washington, DC, 7:543-558, (1998).
Description:
At sites that contain contaminated soils, there can be questions about the magnitude of risk posed by the chemicals in the soils and about the cleanup levels that should be achieved. Knowledge about the rate of release of chemicals is important to answers to such questions. This article: (1) describes a laboratory protocol to obtain rate of release information for chemicals in soils, and (2) provides estimates of the rate of release of individual polyaromatic hydrocarbon (PAH) compounds from several manufactured gas plant (MGP) site soils. The data were analyzed using an empirical two-site model. Different fractions of PAH were released rapidly from these soils. For one soil, this fraction was less than 20%, for others, the fraction ranged from 36 to 85%. The first-order rate constant (k2) of PAH released during the slow phase of chemical release ranged from 0.0001 to 0.01 per hour.
Author Keywords: chemical release, PAH, soils, remediation, MGP sites, availability.