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Soil Remediation – Mercury Speciation in Soil and Vapor Phase During Thermal Treatment
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Applied Physics and Electronics.
Umeå University, Faculty of Science and Technology, Chemistry.
Umeå University, Faculty of Science and Technology, Chemistry.
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2008 (English)In: Water, Air, & Soil Pollution, Vol. 193, no 1-4, 155-63 p.Article in journal (Refereed) Published
Abstract [en]

Spectroscopic (XRD, XPS, ICP-MS and AAS) and microscopic (ESEM) techniques have been used in order to study the chemical effects with emphasis on mercury speciation, during thermal treatment of a mercury contaminated soil. In the untreated soil, mercury was found concentrated in spherical particles, which were successively broken down upon thermal treatment. Hg0 and inorganic mercury compounds (presumably HgO(s) and HgSO4(s)) could be detected. No (CH3)2Hg and only traces of CH3Hg+ could be found. The dependence on temperature and heating time indicated that the evaporation of mercury from the soil was partly controlled by diffusion mechanisms. Mercury volatilized in two separate stages during heating; initial elemental vaporization, and subsequent volatilization of the oxide or sulfate phase at higher temperatures (>230°C). By thermal treatment at 470°C and 20 min, a removal of >99% of the mercury could be achieved.

Place, publisher, year, edition, pages
2008. Vol. 193, no 1-4, 155-63 p.
Keyword [en]
Mercury speciation, Soil remediation, Elemental mercury, Inorganic mercury, Methylated mercury, Thermal treatment, Chlor-alkali, XRD, XPS, GC-ICP-MS, ESEM
Identifiers
URN: urn:nbn:se:umu:diva-10272DOI: doi:10.1007/s11270-008-9679-yOAI: oai:DiVA.org:umu-10272DiVA: diva2:149943
Available from: 2008-08-06 Created: 2008-08-06 Last updated: 2009-09-07Bibliographically approved

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