Ecotoxicity response of chlorpyrifos in Aedes aegypti larvae and Lactuca sativa seeds after UV/H 2 O 2 and UVC oxidation.

Autor: Utzig LM; Federal University of Technology - Paraná, Brazil. Electronic address: larisa@alunos.utfpr.edu.br., Lima RM; Federal University of Technology - Paraná, Brazil., Gomes MF; Federal University of Technology - Paraná, Brazil., Ramsdorf WA; Federal University of Technology - Paraná, Brazil., Martins LRR; Federal University of Technology - Paraná, Brazil., Liz MV; Federal University of Technology - Paraná, Brazil., Freitas AM; Federal University of Technology - Paraná, Brazil. Electronic address: adrianefreitas@utfpr.edu.br.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2019 Mar; Vol. 169, pp. 449-456. Date of Electronic Publication: 2018 Nov 22.
DOI: 10.1016/j.ecoenv.2018.11.003
Abstrakt: Chlorpyrifos (CP) is an organophosphate pesticide widely used in agriculture known to cause neurological and immunological effects in addition to interfering in the reproduction and development of organisms. In this study, CP degradation by UV/H 2 O 2 process and UVC radiation was investigated, and the ecotoxicity and phytotoxicity was evaluated using bioassays of Aedes aegypti larvae and Lactuca sativa seeds. CP degradation was monitored by HPLC-DAD, and kinetic parameters were calculated for all processes evaluated. Results demonstrated that both processes are efficient, showing a reduction of over 97% of initial CP after 20 and 60 min of UV/H 2 O 2 and UVC radiation, respectively. However, samples treated by UV/H 2 O 2 process demonstrated increase of toxicity, leading to larvae mortality (>90% of organisms) and inhibition effects in seed root growth. The relationship between increased toxicity and the CP byproducts formed was not confirmed due to its low concentration. However, the direct influence of acetonitrile solvent, specifically their toxic byproducts, was observed. This study provides insights into parent compound abatement using oxidative treatment and the changes in toxicity due to the transformation of CP byproducts and complex mixtures (acetonitrile as solvent and hydrogen peroxide).
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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