화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.30, No.1, 54-61, February, 2019
DOI10.14478/ace.2018.1111  Export Citation
금속 페라이트가 코팅된 제올라이트의 제조와 Cu(II)의 흡착 특성
Preparation of Zeolite Coated with Metal-Ferrite and Adsorption Characteristics of Cu(II)
백새얀, 누엔반히엡, 김영호†
  • 충남대학교 응용화학공학과
Sae-Yane Baek, Van-Hiep Nguyen, and Young-Ho Kim†
  • Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
E-mail:
초록
본 연구에서는 Cu(II)의 흡착처리 후, 용액 내 함유된 폐흡착제의 효율적인 분리를 위하여 제올라이트(zeolite 4A)의 표면에 금속(Me = Co, Mn, Ni)이 치환된 페라이트 나노 입자를 성장시킨 자성흡착제를 합성하였다. 제올라이트 표면의 금속 페라이트는 용매열 합성법으로 제조되었으며, 자성흡착제의 특성은 XRD (X-ray diffractometer), SEM (scanning electron microscopy) 및 PPMS (physical property measurement system)로 분석하였다. Co-ferrite가 코팅된 제올라이트 복합체(CFZC)의 포화자화율이 5 emu/g으로 가장 높았으며, Cu(II)의 흡착 성능도 우수하였다. CFZC에 의한 Cu(II)의 흡착결과 값들은 298 K에서 Langmuir식에 잘 적용되었다. 그리고 Cu(II)의 흡착공정은 유사 2차 속도식에 부합하였다. 자유에너지 변화값(ΔG0 = -4.63~-5.21 kJ/mol)은 Cu(II)의 흡착이 298~313 K 범위에서 자발적임을 나타내었다.
In this study, a magnetic adsorbent was synthesized by growing ferrite nanoparticles substituted with metals (Me = Co, Mn, Ni) on zeolite 4A for the efficient separation of waste adsorbents present in the solution after the adsorption of Cu(II). The metal ferrite grown on the surface of zeolite was prepared by solvothermal synthesis. Characteristics of the magnetic adsorbent were analyzed by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and physical property measurement system (PPMS). The saturation magnetization of the A type zeolite coated with Co-ferrite (CFZC) was the highest at 5 emu/g and the Cu(II) adsorption performance was also excellent. The adsorption results of Cu(II) on CFZC were well fitted by the Langmuir model at 298 K. Also, the adsorption of Cu(II) on CFZC follows a pseudo-second order kinetic. The Gibbs free energy values (ΔG0) ranging from -4.63 to -5.21 kJ/mol indicates that the Cu(II) adsorption is spontaneous in the temeprature range between 298 and 313 K.
Keywords:Zeolite;Ferrite;Solvothermal synthesis;Adsorption;Copper ion
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