Decontamination and toxicity removal of an industrial effluent containing pesticides via multistage treatment: Coagulation-flocculation-settling and photo-Fenton process
| Autor: | Arlene B. S. Nossol, Oswaldo Gomes Júnior, Maria Clara V.M. Starling, Alam G. Trovó, Maria Gabriela B. Santos |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
021110 strategic
defence & security studies Flocculation Environmental Engineering Chemistry General Chemical Engineering 0211 other engineering and technologies 02 engineering and technology Human decontamination 010501 environmental sciences Pesticide 01 natural sciences chemistry.chemical_compound Tebuthiuron Environmental Chemistry Coagulation (water treatment) Atrazine Turbidity Safety Risk Reliability and Quality Effluent 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Process Safety and Environmental Protection. 147:674-683 |
| ISSN: | 0957-5820 |
| DOI: | 10.1016/j.psep.2020.12.021 |
| Popis: | This paper evaluates the combination of coagulation-flocculation-settling and photo-Fenton for the decontamination of a real effluent containing ametrine ([AMT]=403 mg L−1), atrazine ([ATZ]=2153 mg L−1), imidacloprid ([IMD]=2936 mg L−1) and tebuthiuron ([TBT]=3354 mg L−1) and which is generated during the manufacturing process of pesticides. Physicochemical treatment (coagulation-flocculation-settling) was tested using different concentrations of Al(NO3)3 and Fe(NO3)3. No significant removal was achieved using Al(NO3)3 as coagulant while best results were obtained via coagulation with Fe(NO3)3 (99 % removal of color and turbidity). Pesticides remaining in the supernatant after coagulation-flocculation-settling stages were removed via photo-Fenton under black-light or solar irradiation. 82–95 % removal of target pesticides were obtained after photo-Fenton treatment (2 mmol L−1 of FeOx, 5463 mg L−1 of H2O2) using black-light lamps (400 kJ m−2). Solar irradiation improved the degradation of target pesticides (>99 %) leading to concentrations below quantification limits ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect