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Assessment of metal mobility in MSW incineration ashes using water as the reagent

机译:以水为试剂评估城市固体废弃物焚烧灰烬中金属的迁移率

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摘要

In this work, the methodology for quantification of water-soluble species in ash was evaluated by varying the parameters leaching time, liquid-to-solid ratio, and size reduction by grinding. The basis for the methodology is a modification of Tessier's sequential extraction method. This work concentrated on fly ashes from combustion of MSW in a fluidised bed boiler, and generally the amounts of water-soluble forms of metals in the ashes were low. Longer leaching time generally reduced the amount of water-soluble metal detected, showing the importance of adsorption and re-precipitation processes. The effects of the L/S parameter and of grinding seem to be dependent on the characteristics of the ash matrix.
机译:在这项工作中,通过改变参数浸出时间,液固比和通过研磨减小尺寸来评估灰分中水溶性物质的定量方法。该方法的基础是对Tessier顺序提取方法的修改。这项工作主要集中在流化床锅炉中MSW燃烧产生的飞灰中,并且灰烬中水溶性金属的含量通常较低。较长的浸提时间通常会减少检测到的水溶性金属的量,这表明了吸附和再沉淀过程的重要性。 L / S参数和研磨的影响似乎取决于灰分基质的特性。

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