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Updated: Jul 4, 2026

Quantitative Analysis by Thermogravimetry-Mass Spectrum Analysis for Reactions with Evolved Gases
Published on: October 29, 2018
Speciation of Cr and its leachability in coal by-products from spanish coal combustion plants
M Antonia López-Antón1, Mercedes Díaz-Somoano, Aida Fuente Cuesta
1Instituto Nacional del Carbón (INCAR), CSIC, C/ Francisco Pintado Fe, no 26, Oviedo 33011, Spain.
Abstract:
This study evaluates the behaviour of total Cr and Cr (VI) during coal combustion in two Spanish power stations. The content and distribution of Cr in the feed coal and combustion wastes was determined and the Cr contents were normalized using enrichment factor indexes. The speciation of Cr in the fly ash fractions from the different hoppers of the electrostatic precipitators was established and the possibility that the Cr (VI) might lixiviate when ashes are disposed of at landfill sites was assessed. Differences in the distribution and behavior of Cr in the two power stations were observed. According to European directive 1999/31/CEE, soluble Cr(VI) in the fly ashes studied would be unlikely to pose an environmental or health risk when the ash is disposed of.
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