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Investigations on Cr mobility from coal fly ash

机译：粉煤灰中Cr的迁移率研究

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摘要

Coal fly ash, which is a source of metals emission to environment, was researched. Investigations on Cr chemical fractions and their environmental mobility in ash-solution system were carried out. In order to obtain results repeatedly, the conditions of sequential extraction of Cr from coal fly ash were optimized. It was found that Cr in coal fly ash occurs in the following fractions (mg kg~(-1)): exchangeable (2.5), associated to carbonates (4.0), associated to organic matter and sulfides (8.5), associated to Fe-Mn oxides (16.0), and residual (41.6). Mobility fractions of Cr contain 8.2% of its total concentration in the fly ash in environmental conditions. The obtained results indicate that coal fly ash is a source of environmental contamination by Cr especially, in soils where its utilization is inadequate.
机译：研究了粉煤灰，它是向环境排放金属的来源。进行了灰溶液系统中Cr化学成分及其环境迁移率的研究。为了重复获得结果，优化了从粉煤灰中依次萃取Cr的条件。发现粉煤灰中的Cr的含量如下（mg kg〜（-1））：可交换的（2.5）与碳酸盐（4.0），有机物和硫化物（8.5），Fe-锰氧化物（16.0）和残留物（41.6）。在环境条件下，Cr的流动分数占粉煤灰中总浓度的8.2％。所得结果表明，粉煤灰是Cr造成的环境污染源，特别是在利用不充分的土壤中。

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  • 来源
    《Fuel》 |2009年第8期|1513-1519|共7页
  • 作者

    Eleonora Soco; Jan Kalembkiewicz;

  • 作者单位

    Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Powstancow Warszawy Ave. 6, PL-959 Rzeszow, Poland;

    Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology, Powstancow Warszawy Ave. 6, PL-959 Rzeszow, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chromium; coal fly ash; sequential extraction; contamination; environment;

    机译：铬;粉煤灰顺序提取;污染;环境;

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