Photodegradation of Oryzalin in aqueous isopropanol and acetonitrile

The phototransformation of Oryzalin was studied under UV light (λ ₘₐₓ ≥ 290 nm) and sunlight (λ ₘₐₓ ≥ 250 nm) in aqueous isopropanol and acetonitrile solution in absence and presence of TiO ₂ as sensitizer. The rate of photodegradation of Oryzalin in different solvent system followed first-order kin...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Pesticides, food contaminants, and agricultural wastes, 2016-05, Vol.51 (5), p.287-297
Main Authors: Pramanik, Sukhendu Kumar, Joarder, Soumen, Das, Saktipada, Roy, Sankhajit, Bhattacharyya, Anjan
Format: Article
Language:English
Subjects:
2-Propanol - chemistry
acetonitrile
Acetonitriles - chemistry
Chromatography
Dinitrobenzenes - chemistry
ENVIRONMENTAL SCIENCES
Half-Life
isopropanol
Kinetics
Oryzalin
Photodegradation
Photolysis
photoproduct
Solvents
Sulfanilamides - chemistry
Sunlight
titanium dioxide
Ultraviolet Rays
UV light
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The phototransformation of Oryzalin was studied under UV light (λ ₘₐₓ ≥ 290 nm) and sunlight (λ ₘₐₓ ≥ 250 nm) in aqueous isopropanol and acetonitrile solution in absence and presence of TiO ₂ as sensitizer. The rate of photodegradation of Oryzalin in different solvent system followed first-order kinetics, and calculated half-lives were found to be in the range of 23.52-53.75 h for UV light and 41.23-61.43 h for sunlight. From this study, total 12 photoproducts were identified and characterized on the basis of column chromatography and Q-Tof micromass spectral data. The plausible mechanism of phototransformation involved was hydrolysis, breaking of sulfonic bond, and loss of amino and sulfonic acid group.
ISSN:1532-4109
0360-1234
1532-4109
DOI:10.1080/03601234.2015.1128741