Academic Journal
Photocatalytic Removal of Thiamethoxam and Flonicamid Pesticides Present in Agro-Industrial Water Effluents
| العنوان: | Photocatalytic Removal of Thiamethoxam and Flonicamid Pesticides Present in Agro-Industrial Water Effluents |
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| المؤلفون: | Michalis K. Arfanis, George V. Theodorakopoulos, Christos Anagnostopoulos, Irene Georgaki, Evangelos Karanasios, George Em. Romanos, Emilia Markellou, Polycarpos Falaras |
| المصدر: | Catalysts, Vol 13, Iss 3, p 516 (2023) |
| بيانات النشر: | MDPI AG |
| سنة النشر: | 2023 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | thiamethoxam, flonicamid, insecticides, photocatalytic degradation, titanium dioxide, scavengers, Chemical technology, TP1-1185, Chemistry, QD1-999 |
| الوصف: | Pesticide residues, when present in agricultural wastewater, constitute a potential risk for the environment and human health. Hence, focused actions for their abatement are of high priority for both the industrial sectors and national authorities. This work evaluates the effectiveness of the photocatalytic process to decompose two frequently detected pesticides in the water effluents of the fruit industry: thiamethoxam-a neonicotinoid compound and flonicamid-a pyridine derivative. Their photocatalytic degradation and mineralization were evaluated in a lab-scale photocatalytic batch reactor under UV-A illumination with the commercial photocatalyst Evonik P25 TiO 2 by employing different experimental conditions. The complete degradation of thiamethoxam was achieved after 90 min, when the medium was adjusted to natural or alkaline pH. Flonicamid was proven to be a more recalcitrant substance and the removal efficiency reached ~50% at the same conditions, although the degradation overpassed 75% in the acidic pH medium. Overall, the pesticides’ degradation follows the photocatalytic reduction pathways, where positive charged holes and hydroxyl radicals dominate as reactive species, with complete mineralization taking place after 4 h, regardless of the pH medium. Moreover, it was deduced that the pesticides’ degradation kinetics followed the Langmuir-Hinshelwood (L-H) model, and the apparent rate constant, the initial degradation rate, as well as the L-H model parameters, were determined for both pesticides. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://www.mdpi.com/2073-4344/13/3/516; https://doaj.org/toc/2073-4344; https://doaj.org/article/400eca29e49d4dce8e4f37588eb297c0 |
| DOI: | 10.3390/catal13030516 |
| الاتاحة: | https://doi.org/10.3390/catal13030516 https://doaj.org/article/400eca29e49d4dce8e4f37588eb297c0 |
| رقم الانضمام: | edsbas.6F80085F |
| قاعدة البيانات: | BASE |
| DOI: | 10.3390/catal13030516 |
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