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- W3157793548 abstract "Municipal solid waste (MSW) generation is rapidly increasing in many developing countries owing to population and economic growths. Therefore, reducing MSW is a major issue in the world. In Japan, the incineration is one of the major treatments for reducing MSW volume and weight. Specially, MSWI ashes, which are bottom ash and fly ash, have great potential for recycling in various field such as construction. However, fly ash contains heavy metals like Pb and Zn. Therefore, it might cause environment pollution when they are recycled without any treatment. Chelate treatment for immobilizing hazardous heavy metals in fly ash has possibility of chemical/biological decomposition of chelate-metal complex and might cause long-term high concentration of organic hydrocarbons in landfill site as well as leaching of heavy metals to the environment.In this research, the authors targeted fluidized-bed incinerator fly ash. Fluidized-bed incinerators produce only fly ash and its application is strongly requested in Japan. To replace sand by fly ash, aggregating was required to adjust appropriate particle size in order to comply with physical requirements of heat carrier in fluidized bed combustors. This research utilized geocasting method to create sand-alternative heat carrier using fly ash. When fly ash are recycled as heat carrier, thermal treatment of fly ash is also expected for further immobilization of heavy metals contained in fly ash. In this research, the authors measured surface morphology by scanning electron microscope (SEM), heavy metal leachabilities by leaching tests, surface area by nitrogen adsorption based on Brunauer-Emmett-Teller model (BET), and thermal stability by thermogravimetric analysis. The results demonstrated geopolymer by calcined condition effects improved heavy metal immobilization value, and porous characteristic and heavy metal immobilization were influenced by high temperatures." @default.
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- W3157793548 date "2019-01-01" @default.
- W3157793548 modified "2023-09-23" @default.
- W3157793548 title "IS-33 : Surface and thermal properties of geocasted municipal solid waste incineration fly ash composites" @default.
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