Removal of 17α-ethinylestradiol and caffeine from wastewater by UASB-Fenton coupled system
Autor: | Khirbet López-Velázquez, David Herrera-López, Minerva Villanueva-Rodríguez, Gamaliel Mejía-González |
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Rok vydání: | 2020 |
Předmět: |
endocrine system
0208 environmental biotechnology 02 engineering and technology Estrogenic Compounds 010501 environmental sciences Wastewater Ethinyl Estradiol 01 natural sciences Waste Disposal Fluid chemistry.chemical_compound Bioreactors Caffeine Environmental Chemistry Anaerobic reactor Endocrine system Anaerobiosis Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Sewage urogenital system fungi food and beverages General Medicine Hydrogen Peroxide 020801 environmental engineering 17α ethinylestradiol chemistry Endocrine disruptor Environmental chemistry Sewage treatment hormones hormone substitutes and hormone antagonists |
Zdroj: | Environmental technology. 42(24) |
ISSN: | 1479-487X |
Popis: | In aquatic systems, some substances considered as endocrine disruptors have been detected, which can be due to their incomplete elimination in wastewater treatment plants (WWTPs) and inadequate disposal of pharmaceuticals. Among these contaminants are 17α-ethinylestradiol (EE2) and caffeine (CAF). Moreover, it has been reported that this kind of contaminants may provoke different adverse effects in many aquatic organisms. Because of that, in the present study, up-flow anaerobic sludge blanket reactors (UASB) coupled with the Fenton process was evaluated for EE2 and CAF removal spiked in wastewater samples. First, the best reaction conditions were established in each process. For UASB reactor, two hydraulic retention times (HRT 8 and 24 h) were evaluated, achieving the highest chemical organic demand (COD) removal (70 %) and drug elimination (84 %–86 %) with HRT 24 h. Subsequently, Fenton process was conducted at pH 3 with different levels of Fe2+ (0.05–0.5 mmol/L) and molar ratios Fe2+:H2O2 (1:1–1:10). Better results were obtained with 0.5 mmol Fe2+/L, and 1:10 ratio molar Fe2+:H2O2. Finally, UASB-Fenton coupled system allowed 80 % of COD decrease, almost complete removal of drugs and the toxicity of samples on Vibrio fischeri was reduced from 73 % to 30 %, demonstrating that this coupled system is a promising and efficient system for pharmaceutical compounds removal from wastewater. |
Databáze: | OpenAIRE |
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