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Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes

Authorized Users Only
2014
Authors
Banic, Nemanja D.
Sojic, Daniela V.
Krstić, Jugoslav
Abramović, Biljana F.
Article (Published version)
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Abstract
This contribution is concerned with the comparison of the efficiency of the removal of four pure neonicotinoid active ingredients (AIs) and their commercial formulations (CFs) from aqueous solutions by using different advanced oxidation processes at the pH 2.8. The AIs of thiamethoxam and imidacloprid, and their CFs (Actara and Confidor), having a nitroguanidine functional group, exhibited low persistence to photolysis. In contrast to them, thiacloprid and acetamiprid and their CFs (Calypso and Mospilan), containing a cyanoimine functional group, were stable during the UV irradiation period. As expected, the degradation rate of the studied neonicotinoids increased significantly in the combined action of UV radiation and H2O2. In the case of thiacloprid and acetamiprid and their CFs, the reaction of the OH radicals formed and molecules of these insecticides was the major destruction pathway. The increased photodegradation efficiency of the UV/7.2Fe/TiO2/H2O2 and vis/7.2Fe/TiO2/H2O2 proc...esses was attributed to the surface photoreduction of Fe3+ to Fe2+, which produces new OH radicals in the reaction with H2O2. In the presence of visible light, the efficiency may be partly due to the formation of the H2O2-TiO2 complexes. For the 7.2Fe/TiO2/H2O2 process in the presence of UV or visible radiation, no significant influence on the efficiency of photodegradation was observed in dependence of the structural differences of selected neonicotinoids. These results strongly suggest that highly reactive hydroxyl radicals, generated on the catalyst's surface in the reaction involving H2O2, are responsible for this oxidation. In order to investigate degree of mineralization for all insecticides, TOC measurements were also conducted. Also, it was observed that the removal of pure AIs and their CFs by dark adsorption was almost negligible.

Keywords:
Neonicotinoids / Commercial formulation / Photolysis / Indirect photolysis / Heterogeneous photo-Fenton
Source:
Water Air and Soil Pollution, 2014, 225, 5
Publisher:
  • Springer, Dordrecht
Funding / projects:
  • Development of Methods of Monitoring and Removal of Biologically Actives Substances Aimed at Improving the Quality of the Environment (RS-172042)
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)

DOI: 10.1007/s11270-014-1954-5

ISSN: 0049-6979

WoS: 000338334400022

Scopus: 2-s2.0-84901337435
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URI
https://cer.ihtm.bg.ac.rs/handle/123456789/1564
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Banic, Nemanja D.
AU  - Sojic, Daniela V.
AU  - Krstić, Jugoslav
AU  - Abramović, Biljana F.
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1564
AB  - This contribution is concerned with the comparison of the efficiency of the removal of four pure neonicotinoid active ingredients (AIs) and their commercial formulations (CFs) from aqueous solutions by using different advanced oxidation processes at the pH 2.8. The AIs of thiamethoxam and imidacloprid, and their CFs (Actara and Confidor), having a nitroguanidine functional group, exhibited low persistence to photolysis. In contrast to them, thiacloprid and acetamiprid and their CFs (Calypso and Mospilan), containing a cyanoimine functional group, were stable during the UV irradiation period. As expected, the degradation rate of the studied neonicotinoids increased significantly in the combined action of UV radiation and H2O2. In the case of thiacloprid and acetamiprid and their CFs, the reaction of the OH radicals formed and molecules of these insecticides was the major destruction pathway. The increased photodegradation efficiency of the UV/7.2Fe/TiO2/H2O2 and vis/7.2Fe/TiO2/H2O2 processes was attributed to the surface photoreduction of Fe3+ to Fe2+, which produces new OH radicals in the reaction with H2O2. In the presence of visible light, the efficiency may be partly due to the formation of the H2O2-TiO2 complexes. For the 7.2Fe/TiO2/H2O2 process in the presence of UV or visible radiation, no significant influence on the efficiency of photodegradation was observed in dependence of the structural differences of selected neonicotinoids. These results strongly suggest that highly reactive hydroxyl radicals, generated on the catalyst's surface in the reaction involving H2O2, are responsible for this oxidation. In order to investigate degree of mineralization for all insecticides, TOC measurements were also conducted. Also, it was observed that the removal of pure AIs and their CFs by dark adsorption was almost negligible.
PB  - Springer, Dordrecht
T2  - Water Air and Soil Pollution
T1  - Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes
VL  - 225
IS  - 5
DO  - 10.1007/s11270-014-1954-5
ER  - 
@article{
author = "Banic, Nemanja D. and Sojic, Daniela V. and Krstić, Jugoslav and Abramović, Biljana F.",
year = "2014",
abstract = "This contribution is concerned with the comparison of the efficiency of the removal of four pure neonicotinoid active ingredients (AIs) and their commercial formulations (CFs) from aqueous solutions by using different advanced oxidation processes at the pH 2.8. The AIs of thiamethoxam and imidacloprid, and their CFs (Actara and Confidor), having a nitroguanidine functional group, exhibited low persistence to photolysis. In contrast to them, thiacloprid and acetamiprid and their CFs (Calypso and Mospilan), containing a cyanoimine functional group, were stable during the UV irradiation period. As expected, the degradation rate of the studied neonicotinoids increased significantly in the combined action of UV radiation and H2O2. In the case of thiacloprid and acetamiprid and their CFs, the reaction of the OH radicals formed and molecules of these insecticides was the major destruction pathway. The increased photodegradation efficiency of the UV/7.2Fe/TiO2/H2O2 and vis/7.2Fe/TiO2/H2O2 processes was attributed to the surface photoreduction of Fe3+ to Fe2+, which produces new OH radicals in the reaction with H2O2. In the presence of visible light, the efficiency may be partly due to the formation of the H2O2-TiO2 complexes. For the 7.2Fe/TiO2/H2O2 process in the presence of UV or visible radiation, no significant influence on the efficiency of photodegradation was observed in dependence of the structural differences of selected neonicotinoids. These results strongly suggest that highly reactive hydroxyl radicals, generated on the catalyst's surface in the reaction involving H2O2, are responsible for this oxidation. In order to investigate degree of mineralization for all insecticides, TOC measurements were also conducted. Also, it was observed that the removal of pure AIs and their CFs by dark adsorption was almost negligible.",
publisher = "Springer, Dordrecht",
journal = "Water Air and Soil Pollution",
title = "Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes",
volume = "225",
number = "5",
doi = "10.1007/s11270-014-1954-5"
}
Banic, N. D., Sojic, D. V., Krstić, J.,& Abramović, B. F.. (2014). Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes. in Water Air and Soil Pollution
Springer, Dordrecht., 225(5).
https://doi.org/10.1007/s11270-014-1954-5
Banic ND, Sojic DV, Krstić J, Abramović BF. Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes. in Water Air and Soil Pollution. 2014;225(5).
doi:10.1007/s11270-014-1954-5 .
Banic, Nemanja D., Sojic, Daniela V., Krstić, Jugoslav, Abramović, Biljana F., "Photodegradation of Neonicotinoid Active Ingredients and Their Commercial Formulations in Water by Different Advanced Oxidation Processes" in Water Air and Soil Pollution, 225, no. 5 (2014),
https://doi.org/10.1007/s11270-014-1954-5 . .

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