alexa Photodegradation Kinetics of Fenoxaprop-P-ethyl and Tepraloxydim in Various Aqueous Media and the Impact of Residues on the Growth of Fresh Water Green Alga (Pseudokirchneriella Subcapitata)
ISSN: 2347-7830

Research & Reviews: Journal of Ecology and Environmental Sciences
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Research Article

Photodegradation Kinetics of Fenoxaprop-P-ethyl and Tepraloxydim in Various Aqueous Media and the Impact of Residues on the Growth of Fresh Water Green Alga (Pseudokirchneriella Subcapitata)

Velmurugan Pandiselvi and Atmakuru Ramesh*

Department of Analytical Chemistry, International Institute of Bio-technology and Toxicology (IIBAT), Padappai, Chennai 601 301, Tamil Nadu, India

*Corresponding Author:
Atmakuru Ramesh
Department of Analytical Chemistry, International Institute of Bio-technology and Toxicology (IIBAT), Padappai, Chennai 601 301, Tamil Nadu, India.
Telephone: +91 44 27174246/66
Fax: +91 44 27174455

Received date: 12 December 2013 Accepted date: 29 December 2013

 

 

Abstract

Phototransformation of the herbicides fenoxaprop-p-ethyl and tepraloxydim in natural sunlight was investigated in Milli-Q water and in three different aqueous buffer solutions of pH 5.0, 7.0 and 9.0 at 1.0 μg/mL and 2.0 μg/mL levels. Aliquots of water samples were collected in predetermined intervals and analyzed by a validated HPLC-UV. The method has the limit of quantification 0.01 μg/mL. The influence of cations (Fe2+, Cu2+, Co2+, Ni2+, Mn2+ and Zn2+) and anions (SO42-, Cl-, ClO4-, CO3- and HCO3-) in the photolytic degradation process were studied by adding different concentrations of ions (10-1M, 10-2M and 10-3M) in Milli-Q water. The effect of aeration was also studied in water. A study in dark was conducted at 25°C to understand the hydrolytic behavior of the pesticides under sterile condition. Complete mineralization of residues was confirmed by LC-ESI-MS/MS. A study was conducted to know the impact of residues on the growth of fresh water green alga (Pseudokirchneriella subcapitata).

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