Removal of trace elements from landfill leachate by calcite precipitation

0039301 - ÚACH 2007 RIV NL eng J - Journal Article
Ettler, V. - Zelená, O. - Mihaljevič, M. - Šebek, O. - Strnad, L. - Coufal, P. - Bezdička, Petr
Removal of trace elements from landfill leachate by calcite precipitation.
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Journal of Geochemical Exploration. Roč. 88, 1-3 (2006), s. 28-31. ISSN 0375-6742. E-ISSN 1879-1689
R&D Projects: GA AV ČR(CZ) KJB3111402
Institutional research plan: CEZ:AV0Z40320502
Keywords : landfill leachate * calcite * scavenging
Subject RIV: CA - Inorganic Chemistry
Impact factor: 0.922, year: 2006

Spontaneous precipitation of secondary calcite (CaCO3) has been observed in 25 samples of landfill leachate-polluted stream waters. During the 6-month precipitation experiment, the formation of calcite acts as a principal trace-element scavenging process. The concentrations of Fe, Sr, Ba and Mn and other trace elements in solution significantly decreased as calcite formed during the experiments. The chemical/mineralogical study (SEM/EDS, XRD, ICP MS) revealed that this newly formed calcite contains considerable amounts of metals and metalloids removed from solution. Such a geochemical process can be considered to be important for spontaneous decontamination in landfill-affected environments (stream sediments, soils) or landfill technical facilities (settling basins). This removal takes place especially during dry periods with low rain precipitation, when the landfill waters exhibit both higher alkalinity and higher trace element concentrations.

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Permanent Link: http://hdl.handle.net/11104/0133427