Microcontaminant removal in secondary effluents by solar photo-Fenton at circumneutral pH in raceway pond reactors
| Autor: | Sixto Malato, S. Miralles-Cuevas, Isabel Oller, J.A. Sánchez Pérez, L. Ponce-Robles, I. de la Obra |
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| Rok vydání: | 2017 |
| Předmět: |
Chromatography
02 engineering and technology General Chemistry 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Catalysis chemistry.chemical_compound Iron sulfate EDDS Wastewater chemistry Molar ratio Environmental chemistry Flumequine medicine 0210 nano-technology Effluent 0105 earth and related environmental sciences medicine.drug Raceway pond |
| Zdroj: | Catalysis Today Artículos CONICYT CONICYT Chile instacron:CONICYT |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2016.12.028 |
| Popis: | This paper deals with raceway pond reactors (RPRs) as an alternative photoreactor for solar photo-Fenton applications. Raceway pond reactors are common low-cost reactors which can treat large volumes of water. The experiments were carried out with Fe 3+ :EDDS complex in the secondary effluent of a municipal wastewater treatment plant spiked with a mixture of 100 μg/L each of five pharmaceuticals (carbamazepine, flumequine, ibuprofen, ofloxacin and sulfamethoxazole) at circumneutral pH. In a preliminary stage, two operating strategies, sequential addition of iron sulfate and Fe 3+ :EDDS complex at a 1:2 molar ratio were compared, and Fe 3+ :EDDS complex was found to be the best option. The effect of liquid depth (10, 15 and 20 cm) was also explored. 90% pharmaceutical removal was achieved with accumulated solar UV energy of around 1 kJ/L. Finally, RPRs and tubular photoreactors with compound parabolic collectors (CPC) were compared under realistic conditions. Pharmaceutical removal efficiency was four times higher, increasing from 0.26 mg/kJ with CPC reactors to 1.07 mg/kJ in the 15-cm-deep RPR. As far as the authors know, this is the first detailed study on the effect of liquid depth in RPRs at circumneutral pH. |
| Databáze: | OpenAIRE |
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