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Composites of ZnO nanoparticles and biomass based activated carbon: adsorption, photocatalytic and antibacterial capacities.
Cruz, G J F; Gómez, M M; Solis, J L; Rimaycuna, J; Solis, R L; Cruz, J F; Rathnayake, B; Keiski, R L.
Afiliación
  • Cruz GJF; Departamento de Ingeniería Forestal y Gestión Ambiental, Universidad Nacional de Tumbes, Av. Universitaria s/n, Campus Universitario - Pampa Grande, Tumbes, Perú E-mail: gcruzc@untumbes.edu.pe.
  • Gómez MM; Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Tupac Amaru 210, Lima 25, Perú.
  • Solis JL; Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Tupac Amaru 210, Lima 25, Perú.
  • Rimaycuna J; Departamento de Ingeniería Forestal y Gestión Ambiental, Universidad Nacional de Tumbes, Av. Universitaria s/n, Campus Universitario - Pampa Grande, Tumbes, Perú E-mail: gcruzc@untumbes.edu.pe.
  • Solis RL; Departamento de Biología y Bioquímica, Universidad Nacional de Tumbes, Av. Universitaria s/n, Campus Universitario - Pampa Grande, Tumbes, Perú.
  • Cruz JF; Departamento de Química, Universidad Nacional de Piura, Campus Universitario - Miraflores s/n, Piura, Perú.
  • Rathnayake B; Faculty of Technology, Environmental and Chemical Engineering, University of Oulu, P.O.Box 4300, Oulu FI-90014, Finland.
  • Keiski RL; Faculty of Technology, Environmental and Chemical Engineering, University of Oulu, P.O.Box 4300, Oulu FI-90014, Finland.
Water Sci Technol ; 2017(2): 492-508, 2018 May.
Article en En | MEDLINE | ID: mdl-29851402
Composite material (AC-ZnO) was prepared by growing ZnO nanoparticles during the production of biomass based-activated carbon (AC) via the incorporation of zinc acetate in the process. Comprehensive analyses confirmed the presence of ZnO nanoparticles over the AC surface and described the particular nature of the composite adsorbent. Methylene blue (MB) equilibrium data fitted the Dubinin-Radushkevich model. The MB adsorption capacity was higher for the bare activated carbons (197.9-188.7 mg/g) than the activated carbons with ZnO nanoparticles (137.6-149.7 mg/g). The adsorption of the MB on the adsorbents is physical because the mean adsorption energy (E) is between 1.76 and 2.00 kJ/mol. Experiments that combine adsorption and photocatalysis were carried out with different loads of adsorbents and with and without UV-light exposure. Photocatalytic activity was identified mostly at the first stage of the adsorption process and, in the case of experiments with less load of the composite AC-ZnO, because the light obstruction effect of the activated carbon is more for higher loads. The ZnO grown over AC improves the adsorption of cations such as Pb, Al and Fe in aqueous phase (polluted river water) and provides antibacterial capacity against Escherichia coli and Salmonella typhimurium.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Salmonella typhimurium / Contaminantes Químicos del Agua / Óxido de Zinc / Eliminación de Residuos Líquidos / Escherichia coli / Nanopartículas del Metal / Antibacterianos Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Salmonella typhimurium / Contaminantes Químicos del Agua / Óxido de Zinc / Eliminación de Residuos Líquidos / Escherichia coli / Nanopartículas del Metal / Antibacterianos Idioma: En Revista: Water Sci Technol Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido