| 초록 |
In this work, the adsorption behaviors of activated carbon fibers (ACFs) containing chelating functional groups were studied in the Pb(Ⅱ) removal. The ACFs were modified by fluorination and glycidyl methacrylate (GMA) graft polymerization in order to induce chelating functional group, such as, iminodiacetate (IDA) groups on the ACF surfaces. XPS was used for the surface properties of the ACFs. Specific surface area was calculated from BET equation for N2 adsorption at 77 K. In the result of XPS, the relative intensity of oxygen peaks increased with increasing the time of fluorination. The result was indicated that the radicals were risen due to increased time of fluorination, and increased radicals led to the increase of the IDA groups. Also, specific surface area was decreased due to the pore blocking by increased IDA groups. However, the adsorption of Pb(Ⅱ) was increased with increasing the time of fluorination. It was explained that the IDA groups of the fluorinated ACF surfaces were introduced by GMA graft polymerization and the IDA groups led to an increased of the adsorption of Pb(Ⅱ).
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