Preparation of controlled nano-MgO and investigation of its bactericidal properties |
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| Institution: | 1. Laboratory of Agro-Waste to Resource/Scientific Observing and Experimental Station of Dali, Institute of Agro-Environmental Protection, Ministry of Agriculture, Tianjin 300191, PR China;2. Key Laboratory of Production Environment and Agro-Product Safety, Ministry of Agriculture, Tianjin 300191, PR China;3. Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Tianjin 300191, PR China;4. The School of Environmental Science and Engineering, Tianjin University, Tianjin 300192, PR China;1. School of Physics and DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Johannesburg. Private Bag 3, Wits, 2050, South Africa;2. Lennard-Jones Laboratories, School of Chemical and Physical Sciences, Keele University, Keele, Staffordshire, ST5 5BG, UK;1. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prosp. Akad. Lavrent’eva 5, Novosibirsk 630090, Russian Federation;2. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Prosp. Akad. Lavrent’eva 9, Novosibirsk 630090, Russian Federation;3. Novosibirsk State University, Pirogova st. 2, Novosibirsk 630090, Russian Federation;1. Comisión Nacional de Energía Atómica, Av. Gral Paz 1499, Buenos Aires, Argentina;2. Departamento Ciencias Básicas, Escuela de Educación, Campus Los Angeles, Av. J.A. Coloma 0201, Universidad de Concepción, Chile;3. Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, Quillota 980, Viña del Mar, Chile;1. Instituto Politécnico Nacional - ESIME, México City, 07738, Mexico;2. Instituto Politécnico Nacional - ESFM, México City, 07738, Mexico;3. V. Lashkaryov Institute of Semiconductor Physics at the NAS of Ukraine, 45 pr. Nauky, Kyiv, 03028, Ukraine;4. CIMAP, UMR CNRS/CEA/ENSICAEN/UNICAEN, 6 Boulevard Maréchal Juin, 14050, Caen Cedex 4, France;5. National University “Kyiv-Mohyla Academy”, 2 Skovorody str., Kyiv, 04170, Ukraine |
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| Abstract: | Nano-MgO is a good bactericide but with strong alkalinity in water due to its rapid hydrolysis. To control its hydrolysis rate and keep its bactericidal properties, we synthesized nano-MgO microspheres using chitosan–alginate system in this study. The synthesized nano-MgO release-controlled microspheres (nMgO-RCM) were with 0.98–1.20 mm of particle sizes. Also, their embedding ratio and loading percentage was 63.52% and 12.27%, respectively. Based on the characterization results, nano-MgO was only observed on surface of the nMgO-RCM. Its release rate from the nMgO-RCM could be controlled by the chitosan–alginate system, and the observed rate constant (kobs) increased from 0.0289 h?1 to 0.0358 h?1 with the increment of the dosage from 10 mg L?1 to 80 mg L?1. Furthermore, the nMgO-RCM could maintain pH value lower than 8.5 and colony counts less than 20 CFU mL?1 for at least 120 h. |
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