Please use this identifier to cite or link to this item:
|Title:||2,4,6-Trinitrotoluene (TNT) transformation/sorption in thin-disk soil columns under anaerobic conditions|
|Authors:||Louisiana State University (Baton Rouge, La.)|
Installation Restoration Research Program (U.S.)
Estes, Trudy J.
Myers, Tommy E.
Townsend, Daniel M.
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: Soil and groundwater contaminated with 2,4,6-trinitrotoluene (TNT) has been identified at a number of military installations. Contaminant transport modeling is an important tool in predicting the fate of this contaminant and evaluating the long-term environmental risk. Modeling efforts require information on the effect of soil heterogeneities on the sorption, resorption, and transformation of TNT. The objective of this study was to determine transformation and sorption parameters from TNT breakthrough curves (BTCS) under anaerobic conditions for four soils from the Louisiana Army Ammunition Plant. Soil column studies were conducted in thin-disk columns under a nitrogen atmosphere. Under experimental conditions, sorption and transformation behavior of TNT was limited for all four soils studied. BTCS were fitted with the complete mix model, assuming first-order transformation and linear equilibrium sorption. Distribution coefficients ranged from 1 to 2 l/kg. Transformation coefficients ranged between 0.0080 and 0.0131 hr⁻¹. The principal breakdown products observed were 2A-DNT and 4A-DNT; these were produced in amounts of approximately equal magnitude. In two soils, production of transformation products declined over the period of the study, possibly indicating an exhaustible soil transformation component.
|Appears in Collections:||Technical Report|