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Article

Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater

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Chromatographic Analysis Unit, Soil Science Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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Department of Biology, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11564, Saudi Arabia
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Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11564, Saudi Arabia
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Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11564, Saudi Arabia
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Authors to whom correspondence should be addressed.
Academic Editor: Laura Bulgariu
Water 2021, 13(5), 655; https://doi.org/10.3390/w13050655
Received: 14 January 2021 / Revised: 19 February 2021 / Accepted: 21 February 2021 / Published: 28 February 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
Pesticide residues are harmful to the environment and human and animal health even at low levels because of long-term bioaccumulation. In this study, photolysis was applied to treat three representative water samples: aqueous atrazine and dimethoate solutions as target pesticides, as well as wastewater and agriculture wastewater containing pesticide residue. It was performed using ultraviolet (UV) irradiation at two wavelengths (254 and 306 nm) with exposure times ranging from 2 to 12 h in the presence and absence of a photocatalyst to identify the optimal degradation conditions. Extraction and analyzation process were performed by the Quick Easy Cheap Effective Rugged Safe (QuEChERS) methods and gas chromatography–tandem mass spectrometry with triple quadrupole detector (GC–MSMS/TQD), respectively. Photodegradation increased with an increase in exposure time and the TiO2 catalyst was beneficial for degradation. Both selected irradiation wavelengths were effective, although the wavelength of λ = 306 nm was the most efficient. View Full-Text
Keywords: photolysis; pesticides; degradation; wastewater; agriculture wastewater; TiO2 photolysis; pesticides; degradation; wastewater; agriculture wastewater; TiO2
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MDPI and ACS Style

EL-Saeid, M.H.; Alotaibi, M.O.; Alshabanat, M.; AL-Anazy, M.M.; Alharbi, K.R.; Altowyan, A.S. Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater. Water 2021, 13, 655. https://doi.org/10.3390/w13050655

AMA Style

EL-Saeid MH, Alotaibi MO, Alshabanat M, AL-Anazy MM, Alharbi KR, Altowyan AS. Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater. Water. 2021; 13(5):655. https://doi.org/10.3390/w13050655

Chicago/Turabian Style

EL-Saeid, Mohamed H., Modhi. O. Alotaibi, Mashael Alshabanat, Murefah Mana AL-Anazy, Khadijah R. Alharbi, and Abeer S. Altowyan. 2021. "Impact of Photolysis and TiO2 on Pesticides Degradation in Wastewater" Water 13, no. 5: 655. https://doi.org/10.3390/w13050655

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