SR-XRF and XANES characterization of trace elements and arsenic speciation in combustion products from a small coal-fired boiler

BAO Liangman1; 2 ZHANG Yuanxun1 JIN Chan1; 2 LIN Jun1 LIU Wei1 PENG Lan1 LU Wenzhong1 LI Yulan1 ZHANG Guilin1 LI Yan1 1

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SR-XRF and XANES characterization of trace elements and arsenic speciation in combustion products from a small coal-fired boiler

更新时间：2021-03-12

- SR-XRF and XANES characterization of trace elements and arsenic speciation in combustion products from a small coal-fired boiler
- NUCLEAR TECHNIQUES Issue 9, (2008)
- 作者机构：
  
  中国科学院上海应用物理研究所
- 作者简介：
- 基金信息：
  
  中国科学院知识创新工程重要方向项目(KJCX3-SYW-N3);中国科学院上海应用物理研究所前沿项目(90070301);国家自然科学基金重大项目(10490182);国家自然科学基金(10375084,10775174);Core University Program of Japan资助
- DOI：
  CLC： TK227.1
- Published：01 September 2008
- 稿件说明：
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[1]包良满,张元勋,金婵,林俊,刘卫,彭岚,陆文忠,李玉兰,张桂林,李燕.燃煤小锅炉燃烧产物的SR-XRF和XANES分析[J].核技术,2008(09):641-647.

BAO Liangman1, 2 ZHANG Yuanxun1 JIN Chan1, 2 LIN Jun1 LIU Wei1 PENG Lan1 LU Wenzhong1 LI Yulan1 ZHANG Guilin1 LI Yan1 1. SR-XRF and XANES characterization of trace elements and arsenic speciation in combustion products from a small coal-fired boiler[J]. Nuclear techniques, 2008, (9): 641-647.
[1]包良满,张元勋,金婵,林俊,刘卫,彭岚,陆文忠,李玉兰,张桂林,李燕.燃煤小锅炉燃烧产物的SR-XRF和XANES分析[J].核技术,2008(09):641-647. DOI：

BAO Liangman1, 2 ZHANG Yuanxun1 JIN Chan1, 2 LIN Jun1 LIU Wei1 PENG Lan1 LU Wenzhong1 LI Yulan1 ZHANG Guilin1 LI Yan1 1. SR-XRF and XANES characterization of trace elements and arsenic speciation in combustion products from a small coal-fired boiler[J]. Nuclear techniques, 2008, (9): 641-647. DOI：

摘要

为研究生活锅炉燃煤释放微量元素对环境的影响

应用同步辐射X射线荧光（SR-XRF）测定了锅炉原煤、底灰、飞灰及其PM2.5中V、Cr、Mn、Co、Ni、Cu、Zn、As、Pb等元素含量

探讨了微量元素在煤炭燃烧过程中的转移特性和富集规律。还进行了As的K边X射线吸收近边谱（XANES）测量

研究As在煤炭燃烧排放过程中的价态变化特征。结果表明

V在飞灰中亏损

在底灰富集;Mn、Co在底灰中亏损;Cr、Ni、As、Cu、Pb、Zn等在飞灰和底灰中呈富集状态

As、Cu、Pb、Zn在PM2.5中高度富集。在煤中

As大部分以As5+存在

少部分以As3+存在

As5+占总砷的71%。经过高温燃烧

As富集在飞灰和细颗粒中。在底灰、飞灰和PM2.5中

As主要以As5+存在

相对含量分别为总As的84%、81%和87%。

Abstract

In order to study the release of trace elements from small coal-fired boiler and their impact on the environment

and Pb in the coal

fly ash

bottom ash and PM2.5 flue gas particles wereanalyzed by Synchrotron Radiation X-ray Fluorescence (SR-XRF) and valence of arsenic were measured by K-edge X-ray Absorption Near Edge Spectrum (XANES). Characteristics of migration and accumulation of the trace elements in the combustion process were studied based on the elemental concentrations in the samples. The results showed that V was depleted in fly ash and enriched in bottom ash. Mo and Co were depleted in bottom ash and enriched in fly ash. Cr

and Zn in the bottom ash and fly ash were in enrichment state. As

and Pb were significantly enriched in PM2.5. The arsenic in coal was mainly As5+ with small was amount of As3+. During the combustion

As was enriched in PM2.5 and fly ash. The As5+

as a major speciation of As

was about 84%

81%

and 87% in bottom ash

fly ash

and PM2.5

respectively.

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