Reactivity of several classes of pesticides with UV, ozone and permanganate

Chao Liu*, Zhi Min Qiang, Fang Tian, Tao Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The reactivity of eight classes of 26 extensively used pesticides, namely, organochlorines, thiadiazole, dinitroanaline, acetamides, triazines, uracil and carbamates, with three common disinfectants or oxidants including UV 254 (average intensity of 10.8 mW·cm -2 ), ozone (dosage of 4.1 - 6.2 mg·L -1 ) and permanganate (dosage of 15.8 mg·L -1 ) was investigated. The reactions were allowed to proceed for 30 min at pH 7.0 and ambient temperature (25°C ± 3°C). Results indicate that under the applied experimental conditions, more than 95 % of chlorobenzilate, etridiazole, alachlor, butachlor, metolachlor, propachlor, atrazine, simazine, aldicarb, oxamyl and methiocarb could be effectively removed by UV 254 ; and the removal efficiencies of other pesticides were in a range of 12.9%-77.7%. Ozone could completely degrade chloroneb, dichlorvos, bromacil, aldicarb, carbaryl, carbofuran, oxamyl and methiocarb; prometon and aldicarb sulfone were resistant to ozonation; and the removal efficiencies of other pesticides varied from 19.0% to 93.1%. Permanganate could fully degrade dichlorvos, aldicarb and methiocarb; organochlorines, dinitroanaline, thiadiazole, acetamides and other carbamates were resistant to permanganate oxidation; and the removal efficiencies of other pesticides ranged from 16.0% to 88.2%. If the practical dosage applied in drinking water treatment is considered, it is expected that most of the pesticides will be completely degraded by ozone, a few by permanganate, but probably none by UV 254 .

Original languageEnglish (US)
Pages (from-to)127-133
Number of pages7
JournalHuanjing Kexue/Environmental Science
Volume30
Issue number1
StatePublished - Jan 1 2009

Keywords

  • Degradation
  • Drinking water treatment
  • Ozone
  • Permanganate
  • Pesticide
  • UV

ASJC Scopus subject areas

  • Environmental Science(all)

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