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Hybrid metal and non-metal activation of Oxone by magnetite nanostructures co-immobilized with nano-carbon black to degrade tetracycline: Fenton and electrochemical enhancement with bio-assay
Abstract
Electrochemically synthesized magnetite nanostructures (ESMNPs) as a metal activator and nano-carbon black (NCB) as a non-metal activator were co-immobilized by alginate natural polymer to activate Oxone for the degradation of tetracycline (TC) antibiotic. The formation of sulfate radical was indirectly confirmed during the Oxone/ESMNPs/NCB/alginate process via the addition of scavenging compounds. This study revealed the high reusability potential of the ESMNPs/NCB/alginate with a negligible decrease in the degradation rate from 5.7 × 10−2 to 4.9 × 10−2 min−1 after four experimental runs. The release of iron ions into the effluent did not violate its discharge standard, indicating high stability of the catalyst due to the co-immobilization. The enhanced degradation rate of 6.7 × 10−2 min−1 was observed under basic conditions. Both Fenton (7.9 × 10−2 min−1) and electrochemical (7.7 × 10−2 min−1) processes improved the degradation effectiveness at hydrogen peroxide concentration of 30 mM and current density of 100 mA, respectively. Response surface methodological optimization of the bio-assessment was also performed. Accordingly, the optimized TC concentration of 68 mg/L, Oxone concentration of 1.6 mM and exposure time of 60 min resulted in the minimum inhibition percent (%) of 15.8%. Confirmatory real experiments demonstrated the results of numerical optimization. Possible degradation pathways along with the ECOSAR-based bioassay of the intermediates were also proposed.
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Authors (5)
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Reza Darvishi
- Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran
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Masumeh Naderi
- Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran
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Sahand Jorfi
- Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Alireza Khataee
- Department of Environmental Engineering, Gebze Technical University, 41400 Gebze, Turkey
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
SEPARATION AND PURIFICATION TECHNOLOGY
no. 274,
ISSN: 1383-5866 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Darvishi R., Naderi M., Boczkaj G., Jorfi S., Khataee A.: Hybrid metal and non-metal activation of Oxone by magnetite nanostructures co-immobilized with nano-carbon black to degrade tetracycline: Fenton and electrochemical enhancement with bio-assay// SEPARATION AND PURIFICATION TECHNOLOGY -Vol. 274, (2021), s.119055-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.seppur.2021.119055
- Verified by:
- Gdańsk University of Technology
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