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Pretreatment of pesticide wastewater by photocatalytic oxidation

Authors :
Chen, J.-N.
Lu, M.-C.
Source :
Water Science & Technology. 1997, Vol. 36 Issue 2/3, p117. 0p.
Publication Year :
1997

Abstract

The toxic chemicals, 2,4-D (a herbicide) and propoxur (an insecticide), were used as the model compounds in these experiments. Total organic carbon analyzer was used to assess the efficiency of photocatalytic mineralization. Microtox bioassay was employed in evaluating the toxicity of solutions treated by photocatalysis. Ultraviolet absorption spectra were also used for showing the different characteristics ofthe compounds undergoing photocatalytic oxidation. Results show thatpropoxur is less degradable than 2,4-D, and the photomineralization of these pesticides follows a behavior of first-order reaction. Products of 2,4-D and propoxur are more toxic than the parent compound after partial photodegradation. This shows that complete mineralization is necessary for total detoxification of these pesticides. In other words, toxicity is an important criteria in assessing the pretreatmentprocess. [ABSTRACT FROM AUTHOR]

Subjects

Subjects :
*PESTICIDES
*WASTEWATER treatment

Details

Language :
English
ISSN :
02731223
Volume :
36
Issue :
2/3
Database :
Academic Search Index
Journal :
Water Science & Technology
Publication Type :
Academic Journal
Accession number :
8404982
Full Text :
https://doi.org/10.1016/S0273-1223(97)00377-6