Combating paraben pollution in surface waters with a variety of photocatalyzed systems: Looking for the most efficient technology
| Autor: | Eduardo M. Cuerda-Correa, Joaquín R. Domínguez, Teresa González, Maria J. Muñoz-Peña |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pollution
remediation systems Chemistry media_common.quotation_subject water treatment 02 engineering and technology General Chemistry 010501 environmental sciences 021001 nanoscience & nanotechnology surface-waters 01 natural sciences Paraben chemistry.chemical_compound Environmental chemistry Materials Chemistry Water treatment parabens pollution 0210 nano-technology photo-assisted fenton QD1-999 0105 earth and related environmental sciences media_common |
| Zdroj: | Open Chemistry, Vol 17, Iss 1, Pp 1317-1327 (2019) |
| ISSN: | 2391-5420 |
| Popis: | The constant presence of parabens in natural surface waters has raised a growing concern of the potential long-term toxic effects that parabens may have in wildlife, mainly as endocrine disruptors. The present report describes the results of a study in which different photocatalyzed systems, such as photo-Fenton, Fenton, UV-H2O2, UV-TiO2 and UV-TiO2-H2O2, were applied to the removal of these recalcitrant pollutants in some surface waters, including natural (e.g. rivers) and man-made (e.g. reservoirs and wastewater treatment plants). Degradation of four widely-used parabens (methyl-paraben, ethyl-paraben, propyl-paraben and butyl-paraben) was analyzed. Experimental results reveal that the most efficient method to combat these emerging pollutants was photo-Fenton. When this process was optimized, optimal removal efficiency was attained using doses of H2O2 and Fe(II) equal to 2.92·10−4 mol dm-3 and 1.85·10−5 mol dm-3, respectively. It is also worth noting that the removal rate of these contaminants is slower in natural waters. The results suggest that the photo-Fenton process is promising and maybe an adequate technology for the treatment of these persistent contaminants. |
| Databáze: | OpenAIRE |
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