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Red mud-activated peroxymonosulfate process for the removal of fluoroquinolones in hospital wastewater
- Source :
- Water Research, Water Research, IWA Publishing, 2020, 184, pp.116171. ⟨10.1016/j.watres.2020.116171⟩, Water Research, 2020, 184, pp.116171. ⟨10.1016/j.watres.2020.116171⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- International audience; In this study, a novel peroxymonosulfate (PMS) activation method, which combines a solid waste (i.e., red mud, RM) and a reducing agent (i.e., hydroxylamine, HA), for the oxidative degradation of fluoroquinolones (FQs; i.e., flumequine (FLU) and ciprofloxacin (CIP)) in hospital wastewater (HW) was developed. The addition of HA into the PMS/RM suspension significantly enhanced FLU removal, owing to its ability to enhance the Fe(III)/Fe(II) cycle on the RM surface. The results of the quenching experiments suggested the predominance of SO over OH in the PMS/RM/HA system. Moreover, owing to the greater reactivity between CIP and SO, CIP removal was more effective than FLU removal. Additionally, the liquid chromatography-mass spectroscopy (LC-MS) analysis revealed that the oxidation of CIP and FLU by PMS/RM/HA occurred via sequential and separate processes, involving ring cleavage, hydroxylation, decarbonylation, and defluorination. Surprisingly, the wastewater components exhibited contrasting effects on FLU removal in HW. Natural organic matter, nitrate and sulfate showed a slight impact on the removal performance of FLU, whereas chloride improved the oxidation extent. However, phosphate significantly inhibited the FLU removal because of its competitive binding at the RM surface and its scavenging effect towards SO. This inhibitory effect was overcome by increasing the PMS concentration and its sequential addition, thus guaranteeing successful mineralization of FLU in HW. These results show that the RM/HA system can be utilized to activate PMS for the removal of antibiotics in wastewater.
- Subjects :
- Environmental Engineering
Reducing agent
0208 environmental biotechnology
02 engineering and technology
Hydroxylamine
Wastewater
010501 environmental sciences
Ferric Compounds
01 natural sciences
Chloride
Hydroxylation
chemistry.chemical_compound
Ciprofloxacin
Flumequine
medicine
[CHIM]Chemical Sciences
Waste Management and Disposal
Peroxymonosulfate
0105 earth and related environmental sciences
Water Science and Technology
Civil and Structural Engineering
Red mud
Ecological Modeling
Phosphate
Pollution
Hospital wastewater
6. Clean water
Peroxides
020801 environmental engineering
chemistry
Oxidation-Reduction
Water Pollutants, Chemical
Fluoroquinolones
Nuclear chemistry
medicine.drug
Subjects
Details
- Language :
- English
- ISSN :
- 00431354
- Database :
- OpenAIRE
- Journal :
- Water Research, Water Research, IWA Publishing, 2020, 184, pp.116171. ⟨10.1016/j.watres.2020.116171⟩, Water Research, 2020, 184, pp.116171. ⟨10.1016/j.watres.2020.116171⟩
- Accession number :
- edsair.doi.dedup.....88a1b03e5e5dbe60bd701516df407e7b