Toxicity of TNT Wastewaters to Aquatic Organisms. Volume 2. Acute Toxicity of Condensate Wastewater and 2,4-Dinitrotoluene
Final rept. 15 Apr 1975-15 Dec 1978
SRI INTERNATIONAL MENLO PARK CA
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Condensate wastewater is a distillation product of red water, which is produces at U.S. Army ammunition plants during the continuous manufacture of 2,4,6-trinitrotoluene TNT. Condensate wastewater is composed primarily of nitroaromatic by-products of TNT manufacture. At least 30 organic compounds have been identified in the wastewater that are attributable to TNT production. The major component is 2,4-dinitrotoluene DNT. Acute toxicity tests on red water, condensate wastewater, and 2,4-DNT produced 96-hour LC50s of 360 and 185 mgL as total dissolved solids for red water and condensate wastewater, respectively, and 31.4 mgL for 2,4-DNT in fathead minnows Pimephales promelas. Exposure of condensate wastewater and 2,4-DNT to filtered UV light reduced their acute toxicity by a factor of 2, but the same treatment did not affect the acute toxicity of red water. Benzene extracts of red water and condensate wastewater were more toxic than the remaining aqueous fractions. This suggested that the nonpolar components contribute more to the toxicity of these wastewaters than the polar components. Acute toxicity tests performed on 30 of the organic components of condensate wastewater revealed two with 96-hour LC50s of less than 1.0 mgL in fathead minnows.
- Ammunition and Explosives