Open AccessAdsorption characteristics of amoxicillin antibiotic on CeO2-coated SiO2 nanomaterials
Author(s) -
Thi Mai Anh Le,
Thi My Quynh Pham,
Truong X. Nguyen,
Tien Duc Pham
Publication year - 2020
Publication title -
xúc tác và hấp phụ
Language(s) - English
Resource type - Journals
ISSN - 0866-7411
DOI - 10.51316/jca.2020.079
Subject(s) - adsorption , freundlich equation , fourier transform infrared spectroscopy , ionic strength , scanning electron microscope , nuclear chemistry , materials science , transmission electron microscopy , chemical engineering , nanomaterials , chemistry , nanotechnology , organic chemistry , composite material , aqueous solution , engineering
This study investigated adsorption of beta-lactam antibiotic Amoxicillin (AMX) on a new material of cerium oxide-coated nanosilica (CeO2-coated SiO2). The CeO2-coated SiO2 based on rice husk, was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Adsorption behaviors of AMX on CeO2-coated SiO2 at different pH and ionic strength were thoroughly studied. The highest removal of AMX using CeO2-coated SiO2 reached 99.26 % at pH 4 while the maximum adsorption capacity was found to be greater than 11.0 mg/g. Adsorption isotherms of AMX on CeO2-coated SiO2 at different ionic strength were in accordance with Freundlich model. Adsorption of amphoteric AMX species on CeO2-coated SiO2 increased with a decrease of salt concentration indicating that adsorption was controlled by both electrostatic and non-electrostatic interactions