Record details

Title
    Experimental in Situ Transformation of Pb Smelter Fly Ash in Acidic Soils
Author
    Ettler, Vojtěch
    Grygar, Tomáš Matys
    Klementová, Mariana
    Mihaljevič, Martin
    Šebek, Ondřej
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Environmental Science and Technology
Vol./nr.
    Roč. 46, č. 19
Pages
    10
Year
    2012
Thesaurus term
    pollution-control residues
Keyword
    Acidic
    Ash
    Experimental
    Fly
    Pb
    Situ
    Smelter
    Soils
    Transformation
Abstract (in english)
   Soils in the vicinity of nonferrous metal smelters are often highly polluted by inorganic contaminants released from particulate emissions. We used a technique with double polyamide experimental bags (1-mu m mesh) to study the in situ transformation of fly ash (FA) from a secondary Pb smelter in acidic soil profiles. Between 62 and 66% of the FA dissolved after one year's exposure in the soils, leading to complete dissolution of primary caracolite (Na3Pb2(SO4)(3)Cl) and KPb2Cl5, with formation of secondary anglesite (PbSO4), minor PbSO3, and trace carbonates. Release of Pb was pH-dependent, whereas not for Cd and Zn. Significant amounts of metals (mainly Cd and Zn) partitioned into labile soil fractions. The field data agreed with laboratory pH-static leaching tests performed on FA, which was washed before the experiment to remove soluble salts. This indicates that appropriate laboratory leaching can accurately predict FA behavior in real-life scenarios (e.g., exposure in soil).
Contributor
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
    R
Import date
    27. 4. 2014