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석탄회를 이용한 제올라이트의 합성과 중금속 흡착 특성

The Synthesis of Zeolite Using Fly Ash and Its Heavy Metal Adsorption Performance

류완호^† 이원묵 홍필선 양천회 안재영¹ 백일현² 이병노³

Wan-Ho Roo^† Won-Mook Lee Phil-Sun Hong Chun-Hoe Yang Jae-Young Ahn¹ Il-Hyun Baek² Byong-Ro Lee³

한밭대학교 화학공학과 에너지청정기술연구소, 305-719 대전시 유성구 덕명동 산 16-1 ¹공주대학교 화학공학과, 314-701 충남 공주시 신관동 182 ²한국에너지기술연구원 에너지환경연구부, 305-343 대전시 유성구 장동 71-2 ³(주)대진환경산업, 519-813 전남 화순군 능주면 잠정리 7-3

Department of Chemical Engineering, Hanbat National University RCECT, San 16-1, Dyckmyoung-dong,Yuseoung-gu, Daejeon 305-719, Korea ¹Department of Chemical Engineering, Kongju University, 182 Shinkwan-dong, Kongju, Chungnam 314-701, Korea ²Energy & Environ., Research Department, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea ³Daejin Environment Industry, 7-3 Jamjeong-ri, Nungju, Hawsoon-gun, Chonnam 519-813, Korea

whroo@hanbat.ac.kr

HWAHAK KONGHAK, October 2003, 41(5), 655-660(6), NONE

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Abstract

석탄회를 이용, 중금속 제거용 흡착제 제조를 목적으로 NaOH를 반응물로 한 수열합성 반응으로 제올라이트를 합성하였으며, 이에 대한 성능특성 및 중금속 흡착실험을 수행하였다. SiO₂와 Al₂O₃를 주성분으로 한 석탄회를 NaOH에 의한 수열합성 반응으로 폐수 중에 포함되어 있는 중금속에 대한 제거능력이 높은 제올라이트를 합성하고자 하였다. 따라서 NaOH 농도, 시간을 변화시키면서 제올라이트를 합성하여 실험한 결과 4 M-NaOH, 4시간에서 최적의 조업조건을 얻을 수 있었다. 산에 의한 전처리 과정을 거친 합성 제올라이트는 pH 7-9.5로 중성을 나타내었다. 또한 산처리 합성 제올라이트를 이용하여 중금속인 P, Pb, Cd, Cr, Mn등의 흡착능을 비교한 결과 P, Pb, Cd등은 비교적 흡착능이 우수하게 나타났지만 Cr과 Mn등은 pH가 너무 높기 때문에 거의 흡착이 이루어지지 않았다.

Zeolite was synthesized from coal fly ash produced by a domestic power plant and has applications in the removal of heavy metal from waste water. Zeolite was synthesized using a hydrothermal method involving an alkaline reaction with NaOH. The NaOH concentration and reaction times were varied in order to synthesize zeolite showing the maximum removal efficiency of heavy metal from waste water. The synthesis conditions were optimized at the concentration of 4M-NaOH and the reaction time of 4hrs. The synthesized zeolite needed washing with HCl solution to improve the removal efficiency of P, Pb, Cd, Cr, Mn and it was maximized at pH 7-9.5 in leaching solution of synthesized zeolite.

Keywords

Coal Fly Ash Zeolite Heavy Metal Waste Water

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