Degradation of thiophanate-methyl fungicide by photo-Fenton process using lab-scale annular and solar tubular reactors

Talitha De Andrade Borges, Osvaldo Chiavone-Filho, Antônio Carlos Silva Costa Teixeira, Edson Luiz Foletto, Guilherme Luiz Dotto and Cláudio Augusto Oller Do Nascimento

International Journal of Environmental Technology and Management, 2019, vol. 22, issue 2/3, 128-137

Abstract: In this work, thiophanate-methyl fungicide was degraded by the homogeneous photo-Fenton process using lab-scale annular and solar tubular reactors. A UV light was used as artificial irradiation source in the lab-scale reactor. The influence of hydrogen peroxide (H₂O₂) dosage and initial pollutant concentration on the process efficiency was investigated. Degradation efficiency of thiophanate-methyl fungicide was monitored by measuring the total organic carbon (TOC). The results revealed that the variable H₂O₂ dosage showed remarkable effect on the process efficiency, whereas the fungicide concentration showed little influence. Both reactors showed similar efficiencies, reaching a fungicide mineralisation of 80% at 120 min of reaction time. Therefore, both reactors demonstrate to be effective on the thiophanate-methyl degradation from aqueous solution.

Keywords: annular reactor; degradation; fungicide; H 2 O 2; mineralisation; pesticides; photo-Fenton; solar reactor; thiophanate-methyl; total organic carbon; TOC. (search for similar items in EconPapers)
Date: 2019
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