Composites of ZnO nanoparticles and biomass based activated carbon: Adsorption, photocatalytic and antibacterial capacities
| Autor: | G. J. F. Cruz, Riitta L. Keiski, Mónica M. Gómez, B. Rathnayake, J. Rimaycuna, José Solís, R. L. Solis, J. F. Cruz |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Salmonella typhimurium
Composite number Metal Nanoparticles 02 engineering and technology 010501 environmental sciences zinc acetate 01 natural sciences Waste Disposal Fluid chemistry.chemical_compound adsorbent iron antibacterial activity activated carbon Biomass Composite material Water Science and Technology water pollution drug effect zinc oxide 021001 nanoscience & nanotechnology Anti-Bacterial Agents antiinfective agent zinc oxide nanoparticle Charcoal Photocatalysis Zinc Oxide 0210 nano-technology Methylene blue medicine.drug Environmental Engineering chemistry.chemical_element Salmonella enterica serovar Typhimurium Zinc chemistry Article water pollutant Adsorption medicine Escherichia coli sewage procedures 0105 earth and related environmental sciences lead metal nanoparticle Photolysis river water adsorption aluminum methylene blue aqueous solution Carbon photocatalysis Water Pollutants Chemical Waste disposal Activated carbon |
| Zdroj: | CONCYTEC-Institucional Consejo Nacional de Ciencia Tecnología e Innovación Tecnológica instacron:CONCYTEC |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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