화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.15, No.5, 719-723, September, 2009
DOI10.1016/j.jiec.2009.09.052  Export Citation
Preparation of titanium oxide, iron oxide, and aluminium oxide from sludge generated from Ti-salt, Fe-salt and Al-salt flocculation of wastewater
H.K. Shon1, †, S. Vigneswaran1, J. Kandasamy1, J.-B. Kim2, H.J. Park2, S.W. Choi c3, and J.-H. Kim2, 4
  • 1Faculty of Engineering and Information Technology, University of Technology, Sydney (UTS), P.O. Box 123, Broadway, NSW 2007, Australia
  • 2Photo & Environmental Technology Co. Ltd., Gwangju 500-460, South Korea
  • 3Department of Environmental Engineering, Dong-A University, Busan 604-714, South Korea
  • 4School of Applied Chemical Engineering and The Institute for Catalysis Research, Chonnam National University, Gwangju 500-757, South Korea
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In this study, the settled floc (sludge) produced by aluminum sulfate (Al2(SO4)3), ferric chloride (FeCl3) and titanium tetrachloride (TiCl4) flocculation was recycled with a novel flocculation process, which has a significant potential to the lower cost of waste disposal, protect the environment and public health and yield economically useful by-products. Three coagulants removed 70% of organic matter in synthetic wastewater. The settled floc was incinerated in the range from 100 ℃ to 1000 ℃. Alumina (Al2O3), hematite (Fe2O3), titanium oxide (TiO2) which are the most widely used metal oxides were produced from the wastewater sludge generated by the flocculation in wastewater with Al2(SO4)3, FeCl3 and TiCl4, respectively. TiO2 particles produced from the sludge consisted of the large amount of nano size particles. Hematite (Fe2O3) and grattarolaite (Fe3 (PO4)O3 or Fe3PO7) included the majority of micro size (40%) particles. Alumina (Al2O3) also consisted of micro size (40%). Due to TiO2 usefulness of the application, detailed characterisation of TiO2 after calcination at different temperatures were investigated in terms of X-ray diffraction, energy dispersive X-ray, surface area and photoactivity.
Keywords:Flocculation;Sludge recycling;Titanium dioxide;Hematite;Alumina
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