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首页> 外文期刊>Journal of Residuals Science & Technology >Heavy Metals Leaching from the Incinerator Bottom Ash Used for Road Pavement
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Heavy Metals Leaching from the Incinerator Bottom Ash Used for Road Pavement

机译：从焚化炉底灰中重金属浸出的路面

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This study analyzed the bonding strength of each kind of heavy metals by simulating the influence of pressure and acid rain when recycling incineration bottom ash from real factory as road building materials. Experimental results indicated that total leach quantity of heavy metals gradually reduced over time. After contrasting results of sequential extraction, it can be found that bonding forms of most heavy metals are organic matter state and residue state which are difficult to be leached, while the first three states are easy to be leached. The quantity of leach increased at the beginning due to the metal bonding of the first three states. In addition, compared with heavy metals in high pH value (2.88), leach quantity of all heavy metals is the largest in low pH value (1.1). However, different operating pressures have little effect on the leach of heavy metals. But if the aggregate size of bottom ash changes, it can be found that the large specific surface area of bottom ash with fine aggregate size is beneficial for the bottom ash to contact with filter liquor. Hence, leach concentration of heavy metals is higher than the bottom ash with coarse aggregate.
机译：本研究通过模拟实际工厂焚烧的底灰作为道路建筑材料回收利用时，通过模拟压力和酸雨的影响，分析了各种重金属的结合强度。实验结果表明，随着时间的推移，重金属的总浸出量逐渐减少。通过顺序萃取的对比结果，可以发现大多数重金属的键合形式为有机物态和残留态，难以浸出，而前三个态则易于浸出。由于前三个状态的金属键合，浸出量开始增加。此外，与高pH值（2.88）的重金属相比，低pH值（1.1）中所有重金属的浸出量最大。但是，不同的工作压力对重金属的浸出几乎没有影响。但是，如果底灰的聚集体尺寸发生变化，可以发现具有细聚集体尺寸的底灰的大比表面积有利于底灰与过滤液的接触。因此，重金属的浸出浓度高于具有粗骨料的底灰。

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