Photocatalytic Detoxification of Some Insecticides in Aqueous Media Using TiO 2 Nanocatalyst

Ahmed Massoud, Aly Derbalah, Ibrahim El-Mehasseb, Moustafa Saad Allah, Mohamed S. Ahmed, Ashraf Albrakati and Ehab Kotb Elmahallawy
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Ahmed Massoud: Pesticides Chemistry and Toxicology Department, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
Aly Derbalah: Pesticides Chemistry and Toxicology Department, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
Ibrahim El-Mehasseb: Chemistry Department, Faculty of Science, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
Moustafa Saad Allah: Pesticides Chemistry and Toxicology Department, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
Mohamed S. Ahmed: Department of Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
Ashraf Albrakati: Department of Human Anatomy, College of Medicine, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Ehab Kotb Elmahallawy: Department of Biomedical Sciences, University of Leon, 24004 Leon, Spain

IJERPH, 2021, vol. 18, issue 17, 1-15

Abstract: The present study was performed to fabricate a titanium dioxide (TiO 2 ) nanocatalyst with proper characteristics for the removal of some insecticides (dimethoate and methomyl) from aqueous media. A TiO 2 catalyst of regular (TiO 2 —commercial—/H 2 O 2 /UV) or nano (TiO 2 —synthesized—/H 2 O 2 /UV) size was employed as an advanced oxidation process by combining it with H 2 O 2 under light. Moreover, the total detoxification of insecticides after treatment with the most effective system (TiO 2 (s)/H 2 O 2 /UV) was also investigated through exploring the biochemical alterations and histopathological changes in the liver and kidneys of the treated rats. Interestingly, the present study reported that degradation rates of the examined insecticides were faster using the TiO 2 catalyst of nano size. Complete degradation of the tested insecticides (100%) was achieved under the TiO 2 (s)/H 2 O 2 /UV system after 320 min of irradiation. The half-life values of the tested insecticides under H 2 O 2 /TiO 2 (c)/UV were 43.86 and 36.28 for dimethoate and methomyl, respectively, whereas under the H 2 O 2 /TiO 2 (c)/UV system, the half-life values were 27.72 and 19.52 min for dimethoate and methomyl, respectively. On the other hand, no significant changes were observed in the biochemical and histopathological parameters of rats administrated with water treated with TiO 2 (s)/H 2 O 2 /UV compared to the control, indicating low toxicity of the TiO 2 nanocatalyst-. Altogether, the advanced oxidation processes using TiO 2 nanocatalyst can be considered as a promising and effective remediation technology for the complete detoxification of methomyl and dimethoate in water. However, further future research is needed to identify the possible breakdown products and to verify the safety of the used nanomaterials.

Keywords: photocatalytic; detoxification insecticides; aqueous media; TiO 2 nanocatalyst; nanocatalyst; toxicity; histopathology (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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