Abstract
Core-shell superparamagnetic magnetite nanoparticles material with nano-cellulose and modified nano-cellulose (as nano-cellulose citrate, nano-cellulose carbmate and nano-cellulose acrylamide graft) were synthesized using chemical method. The samples were characterized by Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FTIR) and Vibration Sample Magnetometer (VSM). Solid phase extraction (SPE) technique was used to extract the Th232 daughters from aqueous solution using samples. The extraction efficiencies of samples were investigated by measuring the activity of radioactive ions before and after treatment using High resolution gamma rays spectrometer of hyper pure germanium detector. The effects of type of sorbent, contact time, pH, initial concentrations of adsorbate, adsorption kinetics and adsorption isotherms in one average thickness shell were investigated. The present work study shows that the coating of nano-magnetite with modified nano-cellulose enhanced the adsorption process especially nano-cellulose citrate. Using modified nano-cellulose as coating for Fe3O4 gives economic feasibility, which is to be used in water treatment due to the low cost of production, zero toxicity and suitability to apply to a large volume of solution.
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