Abstract
Nanocomposite of magnetite-silica (Fe3O4@SiO2) was synthesized and walled with a shell of 5,7-dihydroxy-4-methylcoumarin (DHMC). The prepared dihydroxy-4-methylcoumarin magnetite-silica nanocomposite (DHMC-M-SNC) was used in the uranium uptake from the liquid phase in a batch system. The structure of DHMC-M-SNC was investigated by BET, XRD and FTIR analyses. DHMC-M-SNC appeared maximum sorption capacity reached 66.43 mg/g at 30 min and pH 5. The U (VI) sorption system onto DHMC-M-SNC was favorable at low temperature (Exothermic nature) and fitted well with Langmuir (R2 = 0.997) and pseudo-second-order models (R2 = 0.989). Also, recycling of DHMC-M-SNC shows a potential recycle up to 8 cycles. The results show that the prepared nanocomposite can be utilized as an operative sorbent in the U (VI) sorption from the liquid phase.