Metal speciation and attenuation in stream waters and sediments contaminated by landfill leachate

0040401 - ÚACH 2007 RIV DE eng J - Journal Article
Ettler, V. - Matura, M. - Mihaljevič, M. - Bezdička, Petr
Metal speciation and attenuation in stream waters and sediments contaminated by landfill leachate.
[Specifikace kovů a zředění ve vodě potoka a sedimentech kontaminovaných skládkou odpadků.]
Environmental Geology. Roč. 49, č. 4 (2006), s. 610-619. ISSN 0943-0105
R&D Projects: GA AV ČR(CZ) KJB3111402; GA MŠMT(CZ) LN00A028
Institutional research plan: CEZ:AV0Z40320502
Keywords : metals * water * sediment
Subject RIV: CA - Inorganic Chemistry
Impact factor: 0.610, year: 2006

The degree of metal contamination (Zn, Pb, Cu, Ni, Cd) has been investigated in the vicinity of an old unmonitored municipal landfill in Prague, Czech Republic, where the leachate is directly drained into a surface stream. The water chemistry was coupled with investigation of the stream sediment (aqua regia extract, sequential extraction, voltammetry of microparticles) and newly formed products (SEM/EDS, XRD). The MINTEQA2 speciation-solubility calculation showed that the metals (Zn, Pb, Cu, Ni) are mainly present as carbonate complexes in leachate-polluted surface waters. These waters were oversaturated with respect to Fe(III) oxyhydroxides, calcite (CaCO3) and other carbonate phases. Under the near-neutral conditions governing the sediment/water interface in the landfill environment, metals are strongly bound in the stream sediment and remain relatively immobile.

Specifikace kovů a zředění ve vodě potoka a sedimentech kontaminovaných skládkou odpadků.
Permanent Link: http://hdl.handle.net/11104/0134128