Chemical composition and leachability of differently sized material fractions of municipal solid waste incineration bottom ash

被引：44

作者：

Huber, Florian ^{[1
]}

Blasenbauer, Dominik ^{[1
]}

Aschenbrenner, Philipp ^{[1
]}

Fellner, Johann ^{[1
]}

机构：

[1] TU Wien, Inst Water Qual & Resource Management, Karlspl 13-226, A-1040 Vienna, Austria

来源：

WASTE MANAGEMENT | 2019年 / 95卷

关键词：

Bottom ash; Waste incineration; Combustion residues; Sorting analysis; Chemical composition; Particle size distribution; PARTICLE-SIZE; TO-ENERGY; GLASS; MSWI;

D O I：

10.1016/j.wasman.2019.06.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The chemical composition and leachability of municipal solid waste incineration bottom ash are important parameters determining its suitability for utilisation. The objective of the present study is to investigate the chemical composition of individual size and material fractions and their contribution to the total elemental contents of bottom ash. Nine bottom ash samples with a mass of 3000 kg each were sieved to eight size fractions and sorted into different materials. The materials (mineral material, glass, batteries) were separately analysed by inductively coupled plasma optical emission spectrometry after acid digestion. Additionally, x-ray fluorescence measurements and leaching tests were performed. Metals were further analysed by sorting analysis. The chemical analysis revealed that large particles have higher contents of Fe and Si, but lower contents of Ca and S compared to smaller particles. All mineral fractions exceed the legal limit values for utilisation in Austria mainly because of the total contents of Pb and Tl and the leachate contents of Cr and Sb. Glass from bottom ash is enriched in As, Na, Si and Tl compared to the mineral material. Although battery contents contribute only 0.2% to the total mass of bottom ash, they contribute at least 30% to the total content of Cd. Most previous studies neglected large metallic pieces and batteries, which contain most of the Cd, Cr, Cu and Ni present in bottom ash. This practice can result in an underestimation of the total contents of these elements by up to about 70%. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：593 / 603

页数：11

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