| Abstract |
| Using sewage sludge in which the proportion of inorganic substance is low, the light weight aggregate having high mechanical strength could be manufactured by carbonization at high temperature and/or adding another inorganic substances in the feed. At the same time, the porous carbonized aggregate with light weightness and high strength had absorption/adsorption ability by well developed micro/meso pores. Additionally, trying to enhance the its surface capabilities, TiO2 as a photocatalyst and zeolite as adsorbent of inorganic substance was coated on the surface separately and simultaneously. The porous carbonated aggregate was composed of mesopores of 30 ~ 100Å in size with a pore volume of 0.047cm3/g. Moreover, activation of the porous carbonized aggregate showed 2 times larger specific surface area(70m2/g) than carbonization(35m2/g). Zeolite coating on the surface led to 3 times increase in iodine adsorption capacity. Zeolite/TiO2 coating showed larger adsorption ability to remove methylene blue and only zeolite coating showed relative larger heavy metals adsorption rate other than. |
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| Key Words |
| Sewage sludge, Carbonized aggregated, Zeolite coating, TiO2 coating, Sludge activation |
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