Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania

Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania

The titanium dioxide (TiO2) photoassisted degradation of herbicide dinoseb has been examined in aqueous suspensions under UV light irradiation. The degradation kinetics were studied under various conditions such as substrate concentration, type of catalyst, catalyst dosage, pH, and light intensity a...

Full description

Bibliographic Details
Main Authors: Niyaz A. Mir, Malik M. Haque, Abuzar Khan, Mohd. Muneer, Colin Boxall
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:The Scientific World Journal
Online Access:http://dx.doi.org/10.1100/2012/251527
id doaj-b40bafd4779c4eb7b615bad404c76cc3
record_format Article
spelling doaj-b40bafd4779c4eb7b615bad404c76cc32020-11-25T02:46:55ZengHindawi LimitedThe Scientific World Journal1537-744X2012-01-01201210.1100/2012/251527251527Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of TitaniaNiyaz A. Mir0Malik M. Haque1Abuzar Khan2Mohd. Muneer3Colin Boxall4Department of Chemistry, Aligarh Muslim University, Aligarh 202002, IndiaDepartment of Chemistry, Aligarh Muslim University, Aligarh 202002, IndiaDepartment of Chemistry, Aligarh Muslim University, Aligarh 202002, IndiaDepartment of Chemistry, Aligarh Muslim University, Aligarh 202002, IndiaFaculty of Science and Technology, Engineering Building, Lancaster University, Lancaster LA1 4YR, UKThe titanium dioxide (TiO2) photoassisted degradation of herbicide dinoseb has been examined in aqueous suspensions under UV light irradiation. The degradation kinetics were studied under various conditions such as substrate concentration, type of catalyst, catalyst dosage, pH, and light intensity as well as in presence of electron acceptors such as hydrogen peroxide, potassium bromate, and potassium persulphate under continuous air purging, and the degradation rates were found to be strongly influenced by these parameters. The Degussa P25 was found to be more efficient photocatalyst as compared to other photocatalysts tested. Dinoseb was found to degrade efficiently in acidic pH and all the electron acceptors studied enhanced the degradation rate. The results manifested that the photocatalysis of dinoseb followed pseudo-first-order kinetics. A qualitative study of the degradation products generated during the process was performed by GC-MS, and a degradation mechanism was proposed.http://dx.doi.org/10.1100/2012/251527
collection DOAJ
language English
format Article
sources DOAJ
author Niyaz A. Mir
Malik M. Haque
Abuzar Khan
Mohd. Muneer
Colin Boxall
spellingShingle Niyaz A. Mir
Malik M. Haque
Abuzar Khan
Mohd. Muneer
Colin Boxall
Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
The Scientific World Journal
author_facet Niyaz A. Mir
Malik M. Haque
Abuzar Khan
Mohd. Muneer
Colin Boxall
author_sort Niyaz A. Mir
title Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
title_short Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
title_full Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
title_fullStr Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
title_full_unstemmed Photoassisted Degradation of a Herbicide Derivative, Dinoseb, in Aqueous Suspension of Titania
title_sort photoassisted degradation of a herbicide derivative, dinoseb, in aqueous suspension of titania
publisher Hindawi Limited
series The Scientific World Journal
issn 1537-744X
publishDate 2012-01-01
description The titanium dioxide (TiO2) photoassisted degradation of herbicide dinoseb has been examined in aqueous suspensions under UV light irradiation. The degradation kinetics were studied under various conditions such as substrate concentration, type of catalyst, catalyst dosage, pH, and light intensity as well as in presence of electron acceptors such as hydrogen peroxide, potassium bromate, and potassium persulphate under continuous air purging, and the degradation rates were found to be strongly influenced by these parameters. The Degussa P25 was found to be more efficient photocatalyst as compared to other photocatalysts tested. Dinoseb was found to degrade efficiently in acidic pH and all the electron acceptors studied enhanced the degradation rate. The results manifested that the photocatalysis of dinoseb followed pseudo-first-order kinetics. A qualitative study of the degradation products generated during the process was performed by GC-MS, and a degradation mechanism was proposed.
url http://dx.doi.org/10.1100/2012/251527
work_keys_str_mv AT niyazamir photoassisteddegradationofaherbicidederivativedinosebinaqueoussuspensionoftitania
AT malikmhaque photoassisteddegradationofaherbicidederivativedinosebinaqueoussuspensionoftitania
AT abuzarkhan photoassisteddegradationofaherbicidederivativedinosebinaqueoussuspensionoftitania
AT mohdmuneer photoassisteddegradationofaherbicidederivativedinosebinaqueoussuspensionoftitania
AT colinboxall photoassisteddegradationofaherbicidederivativedinosebinaqueoussuspensionoftitania
_version_ 1724755798808068096

Similar Items