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Water microbial disinfection via supported nAg/Kaolin in a fixed-bed reactor configuration
https://orcid.org/0000-0002-5936-9676
https://orcid.org/0000-0001-9838-6252
Abstract In this paper we have investigated and demonstrated the antimicrobial capabilities of nano-silver-4 wt%-kaolin (nAg-4-Kn) composite supported on borosilicate glass beads (BGB). Tests have been conducted in a fixed bed reactor on effluent from the secondary clarifier of a conventional wastewater treatment plant (WWTP) in Abu Dhabi, United Arab Emirates (UAE). The prepared BGB with immobilized nAg-4-Kn (nAg-4-Kn/BGB) were characterized using the RAMAN spectroscopy, TEM equipped with EDX and Focus Ion Beam Scanning Electron Microscope (FIB-SEM) techniques. The rate of disinfection was assessed through Luria-Bertani (LB)-agar plate cell counting technique. The results showed complete disinfection after few hours, which was preserved even after several days in repeated runs. The nAg-4-Kn/BGB was reused, demonstrating that the immobilization of nAg-4-Kn was stably achieved, and the activity and integrity of the composites on the BGB were preserved. First order disinfection kinetic constants were estimated to be 2.76 cm h−1 and 2.56 cm h−1 in two consecutive runs. Analyses of the beads after the experiments showed minor losses of nAg from the kaolin matrix thereby corroborating reusability of these materials.
Highlights nAg/Kaolin composites supported on glass have significant antimicrobial properties. Disinfection of a real effluent follows first order kinetics. nAg/Kaolin composites are stably supported on glass beads. nAg/kaolin supported on glass can be reused over a long time.
Water microbial disinfection via supported nAg/Kaolin in a fixed-bed reactor configuration
https://orcid.org/0000-0002-5936-9676
https://orcid.org/0000-0001-9838-6252
Abstract In this paper we have investigated and demonstrated the antimicrobial capabilities of nano-silver-4 wt%-kaolin (nAg-4-Kn) composite supported on borosilicate glass beads (BGB). Tests have been conducted in a fixed bed reactor on effluent from the secondary clarifier of a conventional wastewater treatment plant (WWTP) in Abu Dhabi, United Arab Emirates (UAE). The prepared BGB with immobilized nAg-4-Kn (nAg-4-Kn/BGB) were characterized using the RAMAN spectroscopy, TEM equipped with EDX and Focus Ion Beam Scanning Electron Microscope (FIB-SEM) techniques. The rate of disinfection was assessed through Luria-Bertani (LB)-agar plate cell counting technique. The results showed complete disinfection after few hours, which was preserved even after several days in repeated runs. The nAg-4-Kn/BGB was reused, demonstrating that the immobilization of nAg-4-Kn was stably achieved, and the activity and integrity of the composites on the BGB were preserved. First order disinfection kinetic constants were estimated to be 2.76 cm h−1 and 2.56 cm h−1 in two consecutive runs. Analyses of the beads after the experiments showed minor losses of nAg from the kaolin matrix thereby corroborating reusability of these materials.
Highlights nAg/Kaolin composites supported on glass have significant antimicrobial properties. Disinfection of a real effluent follows first order kinetics. nAg/Kaolin composites are stably supported on glass beads. nAg/kaolin supported on glass can be reused over a long time.
Water microbial disinfection via supported nAg/Kaolin in a fixed-bed reactor configuration
https://orcid.org/0000-0002-5936-9676
https://orcid.org/0000-0001-9838-6252
Abstract In this paper we have investigated and demonstrated the antimicrobial capabilities of nano-silver-4 wt%-kaolin (nAg-4-Kn) composite supported on borosilicate glass beads (BGB). Tests have been conducted in a fixed bed reactor on effluent from the secondary clarifier of a conventional wastewater treatment plant (WWTP) in Abu Dhabi, United Arab Emirates (UAE). The prepared BGB with immobilized nAg-4-Kn (nAg-4-Kn/BGB) were characterized using the RAMAN spectroscopy, TEM equipped with EDX and Focus Ion Beam Scanning Electron Microscope (FIB-SEM) techniques. The rate of disinfection was assessed through Luria-Bertani (LB)-agar plate cell counting technique. The results showed complete disinfection after few hours, which was preserved even after several days in repeated runs. The nAg-4-Kn/BGB was reused, demonstrating that the immobilization of nAg-4-Kn was stably achieved, and the activity and integrity of the composites on the BGB were preserved. First order disinfection kinetic constants were estimated to be 2.76 cm h−1 and 2.56 cm h−1 in two consecutive runs. Analyses of the beads after the experiments showed minor losses of nAg from the kaolin matrix thereby corroborating reusability of these materials.
Highlights nAg/Kaolin composites supported on glass have significant antimicrobial properties. Disinfection of a real effluent follows first order kinetics. nAg/Kaolin composites are stably supported on glass beads. nAg/kaolin supported on glass can be reused over a long time.
Water microbial disinfection via supported nAg/Kaolin in a fixed-bed reactor configuration
Ozer, Lütfiye Yıldız (author) / Yusuf, Ahmed (author) / Uratani, Joao M. (author) / Cabal, Belén (author) / Díaz, Luis A. (author) / Torrecillas, Ramón (author) / Moya, José S. (author) / Rodríguez, Jorge (author) / Palmisano, Giovanni (author)
Applied Clay Science ; 184
2019-11-22
Article (Journal)
Electronic Resource
English
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