| Summary: | 碩士 === 國立宜蘭大學 === 綠色科技學程碩士在職專班 === 101 === In this work, magnetic particles were firstly protected by oleic acid, and then polymers, which were to be loaded onto the magnetic particles and were prepared with allyl-thiourea as the functional monomer, ethyleneglycol dimethacrylate as the cross-linking agent, 2,2-azobisisobutyronitrile as the initiator, and acetonitrile as the solvent. The magnetic polymers were analyzed by FT-IR, X-ray diffraction and vibrating sample magnetometer (VSM) to obtain the morphological and magnetic properties.
The synthesized magnetic thiourea adsorbents were used to adsorb Cu2+ in an aqueous solution in a batch system, and the maximum adsorption was found to occur at pH 5.5 ± 0.1. The adsorption equilibrium data fit the Langmuir isotherm equation reasonably well with a maximum adsorption capacity of 19.126 mg/g and thermodynamic free energy of -16.147 kJ/mol. A pseudo-second-order model could best describe the adsorption kinetics, and the derived activation energy was 5.551 kJ/mol.
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