scholarly journals Summary of significant results from studies of triazine herbicides and their degradation products in surface water, ground water, and precipitation in the midwestern United States during the 1990s

2005 ◽  
Author(s):  
Elisabeth A. Scribner ◽  
E.M. Thurman ◽  
Donald A. Goolsby ◽  
Michael T. Meyer ◽  
William A. Battaglin ◽  
...  
Keyword(s):  
United States ◽  
Surface Water ◽  
Ground Water ◽  
Degradation Products ◽  
Triazine Herbicides ◽  
Midwestern United States

scholarly journals Evidence for the Formation of Difluoroacetic Acid in Chlorofluorocarbon-Contaminated Ground Water

Molecules ◽  
2019 ◽  
Vol 24 (6) ◽  
pp. 1039 ◽  
Author(s):  
Ute Dorgerloh ◽  
Roland Becker ◽  
Melanie Kaiser
Keyword(s):  
Surface Water ◽  
Ground Water ◽  
Microbial Degradation ◽  
Trifluoroacetic Acid ◽  
Metabolic Pathways ◽  
Urban Areas ◽  
Degradation Products ◽  
Microbial Transformation ◽  
Environmental Media ◽  
Difluoroacetic Acid

The concentrations of difluoroacetic acid (DFA) and trifluoroacetic acid (TFA) in rainwater and surface water from Berlin, Germany resembled those reported for similar urban areas, and the TFA/DFA ratio in rainwater of 10:1 was in accordance with the literature. In contrast, nearby ground water historically contaminated with 1,1,2-trichloro-1,2,2-trifluoroethane (R113) displayed a TFA/DFA ratio of 1:3. This observation is discussed versus the inventory of microbial degradation products present in this ground water along with the parent R113 itself. A microbial transformation of chlorotrifluoroethylene (R1113) to DFA so far has not been reported for environmental media, and is suggested based on well-established mammalian metabolic pathways.

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