Composites of ZnO nanoparticles and biomass based activated carbon: adsorption, photocatalytic and antibacterial capacities

Water Science and Technology : a Journal of the International Association on Water Pollution Research
G J F CruzR L Keiski

Abstract

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 capacit...Continue Reading

References

Oct 7, 2004·Journal of Colloid and Interface Science·M SekarS Rengaraj
Jul 10, 2007·Journal of Colloid and Interface Science·Hector Ortiz-IbarraSergio Gómez-Salazar
Oct 12, 1934·Science·R H Crist, O C Roehling
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Jan 2, 2010·Journal of Hazardous Materials·Mohd RafatullahAnees Ahmad
Mar 31, 2017·Water Environment Research : a Research Publication of the Water Environment Federation·M PiriläR L Keiski

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Citations

Mar 22, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Aquib Jawed, Lalit M Pandey
Jan 17, 2021·Environmental Science and Pollution Research International·Kovo G Akpomie, Jeanet Conradie
Apr 3, 2021·Bioresource Technology·Chatchai RodwihokHan S Kim
Apr 13, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Vahab GhalehkhondabiKeyhan Ketabi
Oct 24, 2021·Letters in Applied Microbiology·H Tabassum, I Z Ahmad

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