화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.15, No.4, 265-272, December, 2009
Export Citation
하수슬러지 활성탄의 벤젠 흡착특성
A Study on the Adsorption Characteristics of Benzene using Activated Carbon from Sewage Sludge
김종문, 정찬교†, 이택룡, 민병훈1, 김형진2, 권영식2
  • 수원대학교 환경공학과, 445-743 경기도 화성시 봉담읍 와우리 산2-2
  • 1수원대학교 화학공학과, 445-743 경기도 화성시 봉담읍 와우리 산2-2
  • 2수원과학대학 환경보건과, 445-742 경기도 화성시 정남면 보통리 산9-10
Jong-Moon Kim, Chan-Kyo Chung†, Taek-Ryong Lee, Byong-Hun Min1, Hyung-Jin Kim2, and Young-Shik Kwon2
  • Dept. of Environmental Engineering, The University of Suwon, San 2-2 Wau-ri, Bongdam-eup, Hwaseong, Gyeonggi-do 445-743, Korea
  • 1Dept. of Chemical & Biochemical Engineering, The University of Suwon, San 2-2 Wau-ri, Bongdam-eup, Hwaseong, Gyeonggi-do 445-743, Korea
  • 2Department of Environmental Health, Suwon Science College, San 9-40 Botong-ri, Jeongnam-myun, Hwaseong, Gyeonggi-do 445-742, Korea
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초록
본 연구에서는 하수슬러지에서 만든 활성탄을 이용하여 벤젠에 대한 정지(static)흡착실험을 수행하였다. 7.999 kPa에 이르는 압력 범위 내에서 온도 조건을 변화시켜 가며 303.15, 318.15, 333.15 K에서 흡착실험을 진행하였다. 등온흡착곡선은 Langmuir isotherm, Freundlich isotherm, Toth isotherm을 적용하여 비교하였다. 벤젠의 흡착량(q)을 fitting한 결과 Langmuir isotherm과 Toth isotherm으로 fitting한 등온흡착곡선의 정확도가 높은 것으로 나타났다. 그리고 Langmuir isotherm의 q(max) 값을 이용하여 흡착제의 흡착량을 비교하였다. 또한, 하수슬러지 활성탄과 상용활성탄의 세공 발달 여부를 비교하기 위해 SEM image를 관찰하였다. SEM image 관찰 결과, 국내외 상용활성탄(DARCO A.C., SPG-100 A.C.)이 하수슬러지 활성탄에 비해 세공발달 정도가 우수하며, 세공발달 정도가 우수한 국내외 상용활성탄(DARCO A.C., SPG-100 A.C.)이 하수슬러지 활성탄에 비해 벤젠흡착량(q)이 높은 것을 확인할 수 있었다. 그러나 실온조건인 303.15K에서 하수슬러지의 최대 벤젠흡착량(q(max))은 국내 상용활성탄(SPG-100 A.C.)의 최대 벤젠흡착량(q(max))과 대등한 수치로 나타났으므로 하수슬러지 활성탄의 상용화 가능성을 검증할 수 있었다.
In this study the experiments on the static adsorption of benzene were carried out using activated carbon made from sewage sludge. The experiment was performed at 303.15 K, 318.15 K and 333.15 K under the pressure up to 7.999 kPa. Isothermal adsorption curves were obtained using Langmuir isotherm, Freundlich isotherm and Toth isotherm for comparison. Based on fitting the adsorption quantity of Benzene (q), the isothermal adsorption curves obtained from Langmuir isotherm and Toth isotherm showed the higher accuracy. Although there was little difference in accuracy between result from Langmuir isotherm and that from Toth isotherm, the adsorption quantity of Benzene (q) was expressed in terms of Langmuir isotherm because less parameters were required for Langmuir isotherm than for Toth isotherm. Moreover SEM images of the activated carbon from sewage sludge and the commercial activated carbon were taken to observe the pore size development. The results showed that the perforation development of the commercial activated carbon (DARCO A.C., SPG-100 A.C.) was better than that of activated carbon from sewage sludge. Adsorption quantity of benzene on commercial activated carbon was confirmed to be higher than that on activated carbon from sewage sludge. However the maximum adsorption quantity of benzene on activated carbon from sewage sludge was close to that on SGP-100 A.C. at 303.15K. Therefore, we may conclude that it is feasible to commercialize the process to manufacturing activated carbon from sewage sludge.
Keywords:Sewage sludge;Activated carbon;Static adsorption experiment
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