Record Details

Photocatalytic degradation of a widely used insecticide Thiamethoxam in aqueous suspension of TiO2: Adsorption, kinetics, product analysis and toxicity assessment

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Photocatalytic degradation of a widely used insecticide Thiamethoxam in aqueous suspension of TiO2: Adsorption, kinetics, product analysis and toxicity assessment
 
Creator MIR, NA
KHAN, A
MUNEER, M
VIJAYALAKHSMI, S
 
Subject GC-MS
Photocatalysis
Semiconductor
Thiamethoxam
TiO2
IONIZATION MASS-SPECTROMETRY
TITANIUM-DIOXIDE
PESTICIDE DERIVATIVES
ADVANCED OXIDATION
AZO-DYE
WATER
BLUE
CONTAMINANTS
DESTRUCTION
 
Description This paper deals with the study of photocatalyzed degradation of an insecticide, Thiamethoxam in aqueous suspension of TiO2. The adsorption of Thiamethoxam on TiO2 surface under dark conditions was also investigated in order to find out equilibrium adsorption constant The degradation kinetics was studied using spectrophotometric method under various conditions such as substrate concentration, type of catalyst, catalyst dosage, pH, and in the presence of electron acceptors such as hydrogen peroxide, potassium bromate, and ammonium persulphate under continuous purging of atmospheric oxygen, and the degradation rates were found to be strongly influenced by these parameters. The results manifested that the photocatalysis of Thiamethoxam follows pseudo-first-order kinetics. The toxicity assessments of the irradiated samples were carried out using human erythrocytes as a model system under in vitro conditions. GC MS study showed the formation of several intermediate products which were characterised based on their molecular mass and mass fragmentation pattern. A probable mechanism for the formation of various products formed during the photocatalytic process of Thiamethoxam was also proposed. (C) 2013 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-10-15T15:43:27Z
2014-10-15T15:43:27Z
2013
 
Type Article
 
Identifier SCIENCE OF THE TOTAL ENVIRONMENT, 458388-398
http://dx.doi.org/10.1016/j.scitotenv.2013.04.041
http://dspace.library.iitb.ac.in/jspui/handle/100/15183
 
Language en