Lee Hwa Young
Battery Research Center, Korea Institute of Science & Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Korea.
J Hazard Mater. 2007 Aug 17;147(1-2):570-5. doi: 10.1016/j.jhazmat.2007.01.066. Epub 2007 Jan 21.
Bottom and fly ash collected from automobile shredder residue (ASR) incinerator have been characterized in terms of particle size, compositions, and heavy metal leaching by the standard TCLP method. Two alternative methods were also examined for the treatment of heavy metals in ASR incinerator ash from the aspect of recycling into construction or lightweight aggregate material. It was remarkable that the concentration of Cu was very high compared to common MSWI bottom and fly ash, which was probably originated from copper wires contained in ASR. As a whole, the results of characterization of ASR fly ash were in good agreement with common MSWI fly ash in terms of particle size, pH, and water-soluble compounds. It was clearly found that heavy metals could be removed thoroughly or partly from ASR fly ash through acid washing with dilute HCl solution so that the remaining fly ash could be landfilled or used as construction material. It was also found that the amount of heavy metal leachability of lightweight aggregate pellet prepared with ASR incineration ash could be significantly decreased so that the application of it to lightweight aggregate would be possible without pre-treatment for the removal of heavy metals.
对从汽车 shredder 残渣（ASR）焚烧炉收集的底灰和飞灰进行了粒度、成分表征，并采用标准TCLP方法对重金属浸出情况进行了分析。还从回收用于建筑材料或轻质骨料的角度研究了两种处理ASR焚烧炉灰中重金属的替代方法。值得注意的是，与普通城市固体废弃物焚烧（MSWI）底灰和飞灰相比，ASR中铜的浓度非常高，这可能源于ASR中含有的铜线。总体而言，ASR飞灰的表征结果在粒度、pH值和水溶性化合物方面与普通MSWI飞灰高度一致。很明显，通过用稀盐酸溶液酸洗，可以将ASR飞灰中的重金属全部或部分去除，从而使剩余的飞灰可以填埋或用作建筑材料。还发现，用ASR焚烧灰制备的轻质骨料颗粒的重金属浸出量可以显著降低，因此无需进行去除重金属的预处理就可以将其应用于轻质骨料。
