Abstract
Nano-silica (Si-AL800) was extracted from the thermally treated rice husk ash by acid leaching route. Coating surface of the extracted silica with chitosan gel was done by a direct mixing to produce silica–chitosan nanocomposite (Si-AL800-chitosan). The resulting samples were examined by different analytical techniques such as SEM, TEM, XRD, BET, TGA/DTA, FT-IR and pore size distribution. The adsorption efficiency of samples towards removal of 152+154Eu radionuclide was investigated under different variables. A maximum capacity of 160 mg/g was found at pH of 5 and 298 K. The order of reaction mechanism is described by pseudo-second order.
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