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Article Abstract
A novel core-shell nanomaterial, ZnO@SiO, based on rice husk for antibiotic and bacteria removal, was successfully fabricated. The ZnO@SiO nanoparticles were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), photoluminescence spectroscopy (PL), Brunauer-Emmett-Teller (BET) method, diffuse reflectance ultraviolet-vis (DR-UV-vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and ζ-potential measurements. β-Lactam antibiotic amoxicillin (AMX) was removed using ZnO@SiO nanoparticles with an efficiency greater than 90%, while removal was higher than 91%. The optimum effective conditions for AMX removal using ZnO@SiO, including solution pH, adsorption time, and ZnO@SiO dosage, were 8, 90 min, and 25 mg/mL, respectively. The maximum adsorption capacity reached 52.1 mg/g, much higher than those for other adsorbents. Adsorption isotherms of AMX on ZnO@SiO were more in accordance with the Freundlich model than the Langmuir model. The electrostatic attraction between negative species of AMX and the positively charged ZnO@SiO surface induced adsorption, while the removal of was governed by both electrostatic and hydrophobic interactions. Our study demonstrates that ZnO@SiO based on rice husk is a useful core-shell nanomaterial for antibiotic and bacteria removal from water.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9685607 | PMC |
| http://dx.doi.org/10.1021/acsomega.2c04226 | DOI Listing |
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Article Synopsis
- Zinc oxide (ZnO) is a key ingredient in tire manufacturing, with new ZnO nanoparticles anchored on silica (ZnO@SiO) being developed to reduce environmental impacts.
- A life cycle assessment predicts that producing ZnO@SiO at an industrial scale could decrease environmental impacts by 89 to 96% compared to pilot-scale production.
- Using ZnO@SiO as a tire activator can reduce life cycle impacts by 9 to 12% due to lower rolling resistance, leading to decreased fuel consumption and overall manufacturer benefits.