Adsorption–desorption, persistence and leaching behavior of thifluzamide in alluvial soil

Investigations were undertaken to study the adsorption–desorption, persistence and leaching of thifluzamide (2′,6′-dibromo-2-methyl-4′-trifluoromethoxy-4-trifluoro methyl-1,3-thiazole-5-carboxanilide) in an alluvial soil under laboratory conditions. The adsorption–desorption studies were carried out...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2004-11, Vol.57 (6), p.471-480
Main Authors: Gupta, Suman, Gajbhiye, Vijay T.
Format: Article
Language:English
Subjects:
Adsorption
Agronomy. Soil science and plant productions
alluvial soils
Analysis of Variance
Anilides - chemistry
Applied sciences
Biological and medical sciences
Biological and physicochemical properties of pollutants. Interaction in the soil
Chromatography, Gas
Chromatography, Liquid
desorption
Dissipation
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Fungicide
fungicide residues
fungicides
Half-Life
India
Kinetics
Leaching
pesticide persistence
Pesticides - chemistry
Pollution
Pollution, environment geology
Soil
Soil - analysis
Soil and sediments pollution
Soil and water pollution
soil pollution
Soil science
Sorption
Thiazoles - chemistry
Thifluzamide
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Summary:Investigations were undertaken to study the adsorption–desorption, persistence and leaching of thifluzamide (2′,6′-dibromo-2-methyl-4′-trifluoromethoxy-4-trifluoro methyl-1,3-thiazole-5-carboxanilide) in an alluvial soil under laboratory conditions. The adsorption–desorption studies were carried out using batch equilibration technique. The results revealed high but weak adsorption of thifluzamide in alluvial soil with K F value of 9.62 and ‘ n’ value of 0.63. About 47–62% of the adsorbed amount got desorbed in four desorption cycles, which further substantiate the hypothesis of weak binding. The hysteresis coefficient varied from 0.19 to 0.40. Persistence studies carried out at three concentration levels (0.1, 1.0 and 10.0 μg g −1) and under three moisture conditions (air-dry, field capacity moisture and submerged) revealed that thifluzamide is a persistent chemical and only 19.5–54.0% dissipation was recorded on 90th day. However, it appears that aerobic microbes are more efficient in degrading thifluzamide than anaerobic microbes. The preliminary leaching studies carried out in the laboratory revealed that thifluzamide was moderately mobile in alluvial soil. Only small amounts (
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2004.06.033