| Popis: |
The WHO considers lead (Pb(II)), methylene blue (MB) and ibuprofen (IBU) as priority pollutants. At the same time, pathogenic Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) in contaminated water, kills millions of people annually. Removing these pollutants from water are necessary for human health and environmental concerns. This study aimed to use nanocomposites of hemp seeds as green adsorbents for multi-applications in water treatment and as anti-microbial agents. Binary nanoparticles (MnO/CuO and MnO/ZnO) were deposited on the surface of hemp seeds (HS). The composites were characterized by SEM, EDX, XRD, FTIR, TEM and BET. Isotherm studies indicated that the Freundlich model best described the adsorption based on heterogeneous surfaces involved in multilayer adsorption uptake and formation. The highest adsorption capacities were obtained with HS-MnO/CuO with, uptakes of 66.58, 68.95 and 21.50 mg/g for Pb(II), MB and IBU respectively. The contact time effect revealed that the process had two phases; phase 1, a rapid adsorption rate and phase 2, a slow increment due to the saturation of the active sites as contact time progressed. ΔHo values were ( |
