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Fate of Trace Elements during the Combustion of Phytoremediation Wood

机译:植物修复木材燃烧过程中微量元素的命运

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摘要

We investigated the fate of trace elements (TE) in poplar wood on the conversion of biomass to heat in a 0.2 MW combustion unit equipped with a fabric filter. The phytoremediation wood was harvested from a TE-contaminated agricultural site planted with a high-density poplar stand. The combustion technology used in the present experiment allows for an efficient separation of the various ash fractions. The combustion process concentrates Cu, Cr, and Ni in the bottom ash, heat exchanger ash, and cyclone ash fractions. Therefore, the impact of the fabric filter is negligible for these elements. Conversely, Cd, Pb, and Zn are significantly recovered in the emission fraction in the absence of the fabric filter above the emission limits. The use of a fabric filter will allow the concentration of these three TEs in the ashes collected below the filter, thus complying with all regulatory thresholds, i.e., those from the large combustion plant EU directive. Because the TE concentrations in the different fractions differed significantly, it is recommended that these fractions be treated separately, especially when recycling of ashes from phytoremediation wood through application in agriculture is envisaged.
机译:我们在配备织物过滤器的0.2 MW燃烧装置中调查了杨木中微量元素(TE)在将生物量转化为热量时的命运。植物修复木材采自种植有高密度白杨林的TE污染农业现场。本实验中使用的燃烧技术可有效分离各种灰分。燃烧过程将Cu,Cr和Ni集中在底灰,热交换器灰和旋风灰中。因此,对于这些因素而言,织物过滤器的影响可以忽略不计。相反,在没有高于排放极限的织物过滤器的情况下,Cd,Pb和Zn在排放分数中得到了显着回收。使用织物过滤器将允许这三种TE集中在过滤器下方收集的灰烬中,从而符合所有监管阈值,即来自大型燃烧厂EU指令的阈值。由于不同部分中的TE浓度差异显着,因此建议分别处理这些部分,尤其是在设想通过在农业中应用植物修复木材回收灰烬的情况下。

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  • 来源
    《Environmental Science & Technology》 |2012年第24期|13361-13369|共9页
  • 作者单位

    Laboratoire Chrono-Environnement, Universite de Franche-Comte, UMR 6249, Place Leclerc, 25030 Besancon, France,Interactions arbres-microorganismes, Universite de Lorraine, UMR 1136, 54506 Vandoeuvre-les-Nancy, France;

    Interactions arbres-microorganismes, Universite de Lorraine, UMR 1136, 54506 Vandoeuvre-les-Nancy, France;

    ENSTIB/LERMAB, Universite de Lorraine, 88000 Epinal, France;

    Cylergie, Centre de Recherche de COFELY, L'Oree d'Ecully - Bat C - Chemin de la Forestiere, 69130 Ecully, France;

    Cylergie, Centre de Recherche de COFELY, L'Oree d'Ecully - Bat C - Chemin de la Forestiere, 69130 Ecully, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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