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Metals teachability from medical waste incinerator fly ash: A case study on particle size comparison

机译：医疗废物焚烧炉粉煤灰中的金属可教导性：以粒度比较为例

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摘要

This paper presents the results from a study of metals leachability of medical waste incinerator fly ash in Japan on the basis of particle size. Sequential extraction and Toxicity Characteristic Leaching Procedure (TCLP) analysis were carried out in order to quantify the leaching amount of metals in each categorized particle size. Sequential extraction was also subjected to identify the preference of binding matrix of metals. The results of sequential extraction showed an increase both exchangeable and carbonate associated chromium concentrations in the bigger particle size fractions. Likewise, concentrations of carbonate matrix of arsenic and tin tended to increase in the bigger particle size fractions. In contrast, exchangeable associated cadmium as well as both exchangeable and carbonate matrices of barium were found higher in the smaller particle size fractions. However, no correlation was found in Kendal-tau correlation analysis between particle size of the ash and metals leachability of the TCLP.
机译：本文介绍了根据粒径对日本医疗垃圾焚烧炉粉煤灰金属浸出性的研究结果。为了量化每种分类粒度中金属的浸出量，进行了顺序萃取和毒性特征浸出程序（TCLP）分析。还进行了连续萃取以鉴定金属结合基质的偏好。顺序萃取的结果表明，较大粒度级分中可交换和碳酸盐相关的铬浓度均增加。同样，砷和锡的碳酸盐基质浓度在较大的粒度级分中趋于增加。相反，发现在较小的粒度级分中，可交换的伴生镉以及钡的可交换和碳酸盐基质都较高。但是，在Kendal-tau相关分析中，灰分的粒径与TCLP的金属浸出性之间没有相关性。

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