| dc.description.abstract | The average amount of the general waste treated by incinerator in Taiwan, between 2001 to 2011 is approximately 4.387 million tonnes. Taiwan has increased year by year the demand for incineration of waste for the sake of the handing of the economic and effective prevention of public nuisance. The resistance instability of environmental hazards is due to fly ash and reaction ash containing lead (Pb), chromium (Cr) and other heavy metal leaching. In the secondary treatment of fly ash and reaction ash, leaching of heavy metals is critical, but the balance bewteen effciency at the same time should still maintain its economic viability. For example, past studies have indicated that the acidic solution as the eluent for the effect of leaching of heavy metals good, but putting up the best stripping effect, the cost of the acidic solution is quite high and the acid leaching of heavy metals waste and required secondary treatment, so the costs will not match the actual demand in the incineration plant. It should still consider the actual operation to strike a balance between dissolution efficiency and economic costs.
In this study, fly ash generated from the recycling plant in Hsinchu and the reaction gray from the sample were analyze. The total analysis (fly ash and reaction ash within the total heavy metal content), Characterization (pH value,chloride ion concentration, crystal structure andsurface morphology, etc.), the detection of heavy metal content (in acidic solution, chelating agents, and washed the leaching of toxic leaching test) and different parameters such as different elution time, eluent concentration and solid-liquid ratio parameters have been explored. The secondary treatment of incinerator fly ash and reaction ash, the use of complete feasibility of leaching of heavy metals, consideration of economic costs and stripping efficiency under conditions for the dissolution of harmful heavy metals substances have been the major aim of this study and results suggested the best leaching of heavy metals using the eluent.
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