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Article

Photo-Catalytic Remediation of Pesticides in Wastewater Using UV/TiO2

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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, P.O. Box 88828, Riyadh 11671, Saudi Arabia
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Department of Chemistry, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 88828, Riyadh 11671, Saudi Arabia
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Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 88828, Riyadh 11671, Saudi Arabia
*
Authors to whom correspondence should be addressed.
Academic Editor: Chengyun Zhou
Water 2021, 13(21), 3080; https://doi.org/10.3390/w13213080
Received: 28 July 2021 / Revised: 25 September 2021 / Accepted: 21 October 2021 / Published: 2 November 2021
One of the most serious environmental concerns worldwide is the consequences of industrial wastes and agricultural usage leading to pesticide residues in water. At present, a wide range of pesticides are used directly to control pests and diseases. However, environmental damage is expected even at their low concentration because they are sustained a long time in nature, which has a negative impact on human health. In this study, photolysis and photocatalysis of the pesticides dieldrin and deltamethrin were tested at two UV wavelengths (254 and 306 nm) and in different test media (distilled water, wastewater, and agricultural wastewater) to examine their ability to eliminate pesticides. TiO2 (0.001 g/10 mL) was used as a catalyst for each treatment. The purpose was to determine the influence of UV wavelength, exposure time, and catalyst addition on the pesticide decomposition processes in different water types. Water was loaded with the tested pesticides (2000 µg) for 12 h under UV irradiation, and the pesticide concentrations were measured at 2 h intervals after UV irradiation. The results showed a clear effect of UV light on the pesticides photodegradations that was both a wavelength- and time-dependent effect. Photolysis was more effective at λ = 306 nm than at λ = 254 nm. Furthermore, TiO2 addition (0.001 g/10 mL) increased the degradation at both tested wavelengths and hence could be considered a potential catalyst for both pesticide degradations. Deltamethrin was more sensitive to UV light than dieldrin under all conditions. View Full-Text
Keywords: photolysis; catalysis; degradation; pesticides; UV; wastewater; agricultural wastewater photolysis; catalysis; degradation; pesticides; UV; wastewater; agricultural wastewater
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MDPI and ACS Style

EL-Saeid, M.H.; Alotaibi, M.O.; Alshabanat, M.; Alharbi, K.; Altowyan, A.S.; Al-Anazy, M. Photo-Catalytic Remediation of Pesticides in Wastewater Using UV/TiO2. Water 2021, 13, 3080. https://doi.org/10.3390/w13213080

AMA Style

EL-Saeid MH, Alotaibi MO, Alshabanat M, Alharbi K, Altowyan AS, Al-Anazy M. Photo-Catalytic Remediation of Pesticides in Wastewater Using UV/TiO2. Water. 2021; 13(21):3080. https://doi.org/10.3390/w13213080

Chicago/Turabian Style

EL-Saeid, Mohamed H., Modhi O. Alotaibi, Mashael Alshabanat, Khadiga Alharbi, Abeer S. Altowyan, and Murefah Al-Anazy. 2021. "Photo-Catalytic Remediation of Pesticides in Wastewater Using UV/TiO2" Water 13, no. 21: 3080. https://doi.org/10.3390/w13213080

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