Formation and stability of Pb-, Zn- Cu-PO4 phases at low temperatures: Implications for heavy metal fixation in polar environments

Duanne White, Erla Hafsteinsdóttir, Damian Gore, Gordon Thorogood, Scott Stark

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    Low temperatures and frequent soil freezeethaw in polar environments present challenges for the immobilisation of metals. To address these challenges we investigated the chemical forms of Pb, Zn and Cu in an Antarctic land�ll, examined in vitro reaction kinetics of these metals and orthophosphate at 2 and 22 C for up to 185 days, and subjected the products to freezeethaw. Reaction products at both temperatures were similar, but the rate of production varied, with Cu-PO4 phases forming faster, and the Zn- and Pb-PO4 phases slower at 2 C. All metal-orthophosphate phases produced were stable during a 2.5 h freezeethaw cycle to �30 C. Metal immobilisation using orthophosphate can be successful in polar regions, but treatments will need to consider differing mineral stabilities and reaction rates at low temperatures.
    Original languageEnglish
    Pages (from-to)143-153
    Number of pages11
    JournalEnvironmental Pollution
    Volume161
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    Heavy Metals
    Heavy metals
    Metals
    Temperature
    Phosphates
    Immobilization
    Cold Climate
    Reaction products
    Reaction kinetics
    Reaction rates
    Minerals
    Soil
    Soils

    Cite this

    White, Duanne ; Hafsteinsdóttir, Erla ; Gore, Damian ; Thorogood, Gordon ; Stark, Scott. / Formation and stability of Pb-, Zn- Cu-PO4 phases at low temperatures: Implications for heavy metal fixation in polar environments. In: Environmental Pollution. 2011 ; Vol. 161. pp. 143-153.
    @article{748bc5c3dbe54d49a0f451ca41996b8a,
    title = "Formation and stability of Pb-, Zn- Cu-PO4 phases at low temperatures: Implications for heavy metal fixation in polar environments",
    abstract = "Low temperatures and frequent soil freezeethaw in polar environments present challenges for the immobilisation of metals. To address these challenges we investigated the chemical forms of Pb, Zn and Cu in an Antarctic land{\^a}�£ll, examined in vitro reaction kinetics of these metals and orthophosphate at 2 and 22 C for up to 185 days, and subjected the products to freezeethaw. Reaction products at both temperatures were similar, but the rate of production varied, with Cu-PO4 phases forming faster, and the Zn- and Pb-PO4 phases slower at 2 C. All metal-orthophosphate phases produced were stable during a 2.5 h freezeethaw cycle to {\^a}�£30 C. Metal immobilisation using orthophosphate can be successful in polar regions, but treatments will need to consider differing mineral stabilities and reaction rates at low temperatures.",
    keywords = "Orthophosphate, Thala Valley, Landfill, X-ray diffraction (XRD), Antarctica",
    author = "Duanne White and Erla Hafsteinsd{\'o}ttir and Damian Gore and Gordon Thorogood and Scott Stark",
    year = "2011",
    doi = "10.1016/j.envpol.2011.09.035",
    language = "English",
    volume = "161",
    pages = "143--153",
    journal = "Environmental Pollution",
    issn = "0269-7491",
    publisher = "Elsevier Limited",

    }

    Formation and stability of Pb-, Zn- Cu-PO4 phases at low temperatures: Implications for heavy metal fixation in polar environments. / White, Duanne; Hafsteinsdóttir, Erla; Gore, Damian; Thorogood, Gordon; Stark, Scott.

    In: Environmental Pollution, Vol. 161, 2011, p. 143-153.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Formation and stability of Pb-, Zn- Cu-PO4 phases at low temperatures: Implications for heavy metal fixation in polar environments

    AU - White, Duanne

    AU - Hafsteinsdóttir, Erla

    AU - Gore, Damian

    AU - Thorogood, Gordon

    AU - Stark, Scott

    PY - 2011

    Y1 - 2011

    N2 - Low temperatures and frequent soil freezeethaw in polar environments present challenges for the immobilisation of metals. To address these challenges we investigated the chemical forms of Pb, Zn and Cu in an Antarctic land�ll, examined in vitro reaction kinetics of these metals and orthophosphate at 2 and 22 C for up to 185 days, and subjected the products to freezeethaw. Reaction products at both temperatures were similar, but the rate of production varied, with Cu-PO4 phases forming faster, and the Zn- and Pb-PO4 phases slower at 2 C. All metal-orthophosphate phases produced were stable during a 2.5 h freezeethaw cycle to �30 C. Metal immobilisation using orthophosphate can be successful in polar regions, but treatments will need to consider differing mineral stabilities and reaction rates at low temperatures.

    AB - Low temperatures and frequent soil freezeethaw in polar environments present challenges for the immobilisation of metals. To address these challenges we investigated the chemical forms of Pb, Zn and Cu in an Antarctic land�ll, examined in vitro reaction kinetics of these metals and orthophosphate at 2 and 22 C for up to 185 days, and subjected the products to freezeethaw. Reaction products at both temperatures were similar, but the rate of production varied, with Cu-PO4 phases forming faster, and the Zn- and Pb-PO4 phases slower at 2 C. All metal-orthophosphate phases produced were stable during a 2.5 h freezeethaw cycle to �30 C. Metal immobilisation using orthophosphate can be successful in polar regions, but treatments will need to consider differing mineral stabilities and reaction rates at low temperatures.

    KW - Orthophosphate

    KW - Thala Valley

    KW - Landfill

    KW - X-ray diffraction (XRD)

    KW - Antarctica

    U2 - 10.1016/j.envpol.2011.09.035

    DO - 10.1016/j.envpol.2011.09.035

    M3 - Article

    VL - 161

    SP - 143

    EP - 153

    JO - Environmental Pollution

    JF - Environmental Pollution

    SN - 0269-7491

    ER -