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Fotolitička i fotokatalitička razgradnja odabranih herbicida u vodenoj sredini

Photolytic and photocatalytic degradation of selected herbicides in aqueous media

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Author
Despotović, Vesna
Mentor
Abramović, Biljana
Committee members
Jovanović, Ljiljana
Abramović, Biljana
Čomor, Mirjana
Nikolić, Aleksandar
Šojić, Daniela
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Abstract
Ispitana je kinetika i mehanizam fotokatalitičke razgradnje herbicida kvinmeraka i klomazona u prisustvu UV/TiO2  Degussa P25, odnosno piklorama i  klopiralida  primenom UV/TiO2  Wackherr pri različitim eksperimentalnim uslovima. Praćena je i kinetika razgradnje odabranih herbicida direktnom fotolizom uz primenu sunčevog, UV i vidljivog zračenja, kao i u odsustvu svetlosti. Pored toga, upoređena je efikasnost  UV/TiO2  Degussa P25, odnosno UV/TiO2  Wackherr sa vidljivim zračenjem, kao i direktnom fotolizom u prisustvu pomenutih izvora svetlosti.  U cilju procene  citotoksičnosti klomazona i klopiralida, kao i smeše klomazona i klopiralida i njihovih intermedijera nastalih tokom fotokatalitičke razgradnje ispitan je  in vitro  rast  ćelijskih linija  MRC-5 i H-4-II-E.  Nakon ispitivanja fotokatalitičke razgradnje odabranih herbicida u dvaput destilovanoj vodi, praćena je njihova razgradnja i u prirodnim vodama. Takođe, ispitan je uticaj dodatka hidrogenkarbonata i huminske kiseline na e...fikasnost razgradnje odabranih herbicida. Fotokatalitička razgradnja klomazona, piklorama i mekopropa je ispitivana i u prisustvu UV/TiO2  nanocevi. Aktivnost katalizatora TiO2 Wackherr  i TiO2  nanocevi je upoređena sa TiO2  Degussa P25.

The kinetics and mechanism of photocatalytic degradation of the herbicides quinmerac and clomazone in the presence of UV/TiO2  Degussa P25, and of picloram and clopyralid using UV/TiO2  Wackherr under different experimental conditions were studied. The kinetics of degradation of selected herbicides by direct photolysis using sunlight, UV and visible radiation, and in the absence of light were followed. In addition, the efficiencies of UV/TiO2  Degussa P25 and UV/TiO2 Wackherr  were compared with visible radiation and direct photolysis in the presence of the above mentioned light sources. In order to evaluate the cytotoxicity of clomazone  and clopyralid alone and in their mixture with intermediates formed during the photocatalytic degradation, in vitro growth of cell lines, MRC-5 and H-4-II-E was followed. After examining  the photocatalytic degradation of selected herbicides in double distilled water, their decomposition in natural waters was also followed. Also, the influence of hydr...ogencarbonate and humic acid addition on the efficiency of degradation of selected herbicides was studied. Photocatalytic degradations of clomazone, picloram and mecoprop were investigated in the presence of UV/TiO2 nanotubes. Activities of the catalysts TiO2  Wackherr and TiO2 nanotubes were compared to TiO2 Degussa P25.

Faculty:
Универзитет у Новом Саду, Природно-математички факултет
Date:
10-07-2014
Projects:
  • Development of Methods of Monitoring and Removal of Biologically Actives Substances Aimed at Improving the Quality of the Environment (RS-172042)
Keywords:
fotokatalitička razgradnja herbicida / photocatalytic degradation of herbicides / TiO2 Degussa P25 / TiO2 Wackherr / TiO2 nanocevi / prirodne vode / toksičnost / mehanizam fotorazgradnje / natural water / TiO2 Degussa P25 / TiO2 Wackherr / TiO2 nanotube / toxicity / mechanism photodegradation
[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_nardus_1707
URI
http://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija139868617468537.pdf?controlNumber=(BISIS)86616&fileName=139868617468537.pdf&id=1884&source=NaRDuS&language=sr
https://nardus.mpn.gov.rs/handle/123456789/1707
http://www.cris.uns.ac.rs/record.jsf?recordId=86616&source=NaRDuS&language=sr
http://www.cris.uns.ac.rs/DownloadFileServlet/IzvestajKomisije13986861819598.pdf?controlNumber=(BISIS)86616&fileName=13986861819598.pdf&id=1885&source=NaRDuS&language=sr

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