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Decomposition of herbicides in the soil by non‐biological chemical processes
Author(s) -
Hance R. J.
Publication year - 1967
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740181111
Subject(s) - decomposition , paraquat , picloram , environmental chemistry , atrazine , soil water , slurry , chemistry , degradation (telecommunications) , aqueous solution , chemical decomposition , environmental science , pesticide , soil science , agronomy , environmental engineering , biology , organic chemistry , telecommunications , computer science
Velocity constants of the decomposition reactions undergone by six herbicides when present in aqueous slurries of soils and clay were determined at 85°, 95° and 107°. It was assumed that biological action would not occur at these temperatures. Velocity constants at 20° were estimated by extrapolation. The results show that decomposition by purely chemical means is unlikely to be an important pathway of degradation for the herbicides studied, atrazine, chlorpropham, diuron, linuron, paraquat and picloram, as the half‐lives at 20° would be in the range 9 to 116 years.