Effectiveness of UV/SO 3 2- advanced reduction process for degradation and mineralization of trichlorfon pesticide in water: identification of intermediates and toxicity assessment.

Autor: Jafari B; Department of Environmental Health Engineering, School of Health, Alborz University of Medical Sciences, Karaj, Iran., Godini H; Department of Environmental Health Engineering, School of Health, Alborz University of Medical Sciences, Karaj, Iran. godini_h@yahoo.com.; Research Center for Health, Safety and Environment (HSE), Alborz University of Medical Sciences, Karaj, Iran. godini_h@yahoo.com., Soltani RDC; Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran., Seydi E; Research Center for Health, Safety and Environment (HSE), Alborz University of Medical Sciences, Karaj, Iran.; Department of Occupational Health and Safety Engineering, School of Health, Alborz University of Medical Sciences, Karaj, Iran.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Mar; Vol. 29 (14), pp. 20409-20420. Date of Electronic Publication: 2021 Nov 04.
DOI: 10.1007/s11356-021-17274-z
Abstrakt: This study aimed to investigate the degradability, mineralization, proposed decomposition pathway, intermediate products, and toxicity of effluent from trichlorfon (TCF) degradation in water by UV/sulfite-advanced reduction process (UV/S-ARP). This study was experimentally performed in a photochemical reactor as a batch operation. The source of light was a UV lamp. Sulfite ion was used as the reducing agent. After the treatment, the residual concentration of TCF was measured by liquid chromatography equipped with tandem mass spectrometry (LC-MS/MS). UV/S-ARP had the highest performance at an initial pH of 7, a sulfite ion concentration of 120 mg/L, a contact time of 60 min, and a TCF concentration of 10 mg/L. Under such conditions, the degradation efficiency of TCF was 96.0%, and the amount of mineralization based on the removal of TOC and COD was 74.6% and 79.5%, respectively. The results of the degradation mechanism showed that e aq - and SO 3 •- have played the greatest role in dechlorination and transformation of TCF. Based on the identified intermediates, more complex compounds are transformed into compounds with simpler structures by UV/S-ARP. Evaluating the toxicity of TCF by-products via ECOSAR bioassay showed that as-generated intermediates do not have acute and chronic adverse effects on fish. The results of our study indicated that the advanced reduction process could be an effective process for the purification of TCF-contaminated water.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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