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Phototransformation of isoproturon in soil

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Title Phototransformation of isoproturon in soil
Not Available
 
Creator Partha P. Choudhury and Rohit Pandey
 
Subject Dissipation, Isoproturon, Phototramsformation, Soil
 
Description Not Available
The present experiment was conducted with an objective to reveal the photochemical behaviour of
isoproturon on different soil surfaces, viz. red, black and alluvial soil under sunlight. The half-life values
of isoproturon on glass surface was found as 25.38 days. But on soil surfaces, the rate of photolysis was
changed with half-life values of 20.76, 27.38 and 28.02 days under sunlight for red, black and alluvial soil,
respectively. The slower reaction rate on the surfaces of black and alluvial soil was due to the quenching
effect imparted by humic substances, which were absent on glass surface and less in red soil. The
sunlight-irradiated extracts of isoproturon and its degradation products were analysed by LC-MS/MS
using electrospray interfacing technique and the structures of six different photoproducts were
characterised by their respective spectra as 3-(4-isopropyl-2/3-hydroxyphenyl)-1-methyl-1-
hydroxymethylurea (I), 3-(4-isopropyl-2/3-hydroxyphenyl)-1-methyl-1-(N,N-dimethylcarbamoyl)urea
(II), 3-(4-isopropyl-2/3-hydroxyphenyl)-1-methyl-1-(N-methylcarbamoyl)urea (III), 3-(4-isopropyl-2/3-
hydroxyphenyl)-1-methyl-1-carbamoyl urea (IV), N-dimethyl-N -methyl urea (V), N-dimethyl-N -
dimethyl urea (VI). The products were mainly formed through demethylation, ring oxidation and
rearrangement. Thus, sunlight induced photodegradation may contribute in the dissipation of
isoproturon in soil minimising the load of environmental hazards.
Not Available
 
Date 2019-03-19T08:31:20Z
2019-03-19T08:31:20Z
2017-12-31
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/17487
 
Language English
 
Relation Not Available;
 
Publisher ISWS