Solvent Release into a Sandy Aquifer. 1. Overview of Source Distribution and Dissolution Behavior

Autor:	Stanley Feenstra, Kim Broholm, John A. Cherry
Rok vydání:	1999
Předmět:	Hydrology geography geography.geographical_feature_category Trichloroethylene Tetrachloroethylene Soil science Aquifer General Chemistry Plume chemistry.chemical_compound chemistry Environmental Chemistry Environmental science Solubility Water pollution Dissolution Groundwater
Zdroj:	Environmental Science & Technology. 33:681-690
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es980097d
Popis:	This paper describes some of the results from a field experiment at the Canadian Forces Base Borden, Ontario, Canada. Five liters of a chlorinated solvent mixture (2.0 L of trichloroethylene, 0.5 L of chloroform, and 2.5 L of tetrachloroethylene) was released into a sandy aquifer to create a heterogeneously distributed source. The dissolution and dissolved-phase plume development from this source were studied in detail along a cross-section downgradient of the source for a period of approximately 1 yr. At the conclusion of the experiment, the site was excavated to map the actual distribution of solvent residuals in the subsurface. Dissolved-phase concentrations exceeded 10% of the effective solubility of the individual components in the portion of the plume directly downgradient of the source, providing a strong indication of the presence of dense nonaqueous-phase liquids (DNAPLs). Dissolved-phase concentrations in several sampling points exceeded 50% of the effective solubility. However, even with detail...
Databáze:	OpenAIRE
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