화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.2, 179-185, April, 2002
Export Citation
수용액에서 이산화티타늄, 알루미나, 실리카에 대한 Pb(II)의 흡착 특성
Adsorption Characteristics of Pb(II) on Titanium Dioxide, Alumina, and Silica in Aqueous Solutions
이용준, 정재관†
  • 성균관대학교 화학공학과, 수원 440-746
Young Jun Lee, and Jaygwan G. Chung†
  • Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
E-mail:
초록
수용액에서 이산화티타늄, 알루미나, 실리카에 대한 납(Pb(+2))이온의 흡착특성을 연구하기 위해 슬러리상 반응기와 고정상 반응기를 이용하여 흡착실험을 실시했다. 이산화티타늄과 실리카에 대한 납이온의 흡착은 Freundlich 흡착등온식으로 나타내는 것이 적합한 반면 알루미나의 경우에는 Langmuir 흡착등온식이 더 적합했다. 이산화티타늄, 알루미나, 실리카는 pH값이 산성에서 염기성 영역으로 이동할수록 흡착량이 증가하다가 pH 6 이상에서는 정체 내지 미소한 변화만이 관찰되었다. 3.5 g/L 농도의 슬러리상 반응기에서 알루미나는 60 min 경과 후에 이산화티타늄, 실리카보다 각각 2배, 3배 흡착이 빠르게 진행되었으며 8.0 mg/cm(2)의 흡착제가 고정된 반응기에서는 알루미나는 60 min 경과 후에 초기농도의 27%가 흡착되어 이산화티타늄(9.6%), 실리카(5%)보다 각각 2.8배, 5.4배 흡착능이 높았다.
Adsorption experiments were performed using slurry and immobilized reactors to investigate the adsorption characteristics of lead ion(II) on titanium dioxide, alumina, and silica in aqueous solutions. Freundlich adsorption isotherm of a lead ion(II) on both titanium dioxide and silica was found to be suitable. In case of alumina, however, Langmuir adsorption isotherm was more suitable than Freundlich isotherm. The adsorption amount on titanium oxide, alumina, and silica increased as the pH value increased; however, it remained constant or stagnant for pH over 6. In the reactor with a slurried particle concentration of 3.5 g/L, the adsorption on alumina, after 60 min, was 2 and 3 times faster than titanium dioxide and silica, respectively. In the reactor with the immobilzed particle amount of 8.0 mg/cm(2), after 60 min, the adsorptivity on alumina was 27%, and this was 2.8 and 5.4 times higher than titanium dioxide(9.6%) and silica(5%), respectively.
Keywords:adsorption;lead ion(II);titanium dioxide;alumina;silica
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