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Remediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/vermiculite sorbent for mercury vapor removal.

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    SYSNO ASEP0533656
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleRemediation of brownfields contaminated by organic compounds and heavy metals: a bench-scale test of a sulfur/vermiculite sorbent for mercury vapor removal.
    Author(s) Topka, Pavel (UCHP-M) RID, ORCID, SAI
    Soukup, Karel (UCHP-M) RID, SAI, ORCID
    Hejtmánek, Vladimír (UCHP-M) RID, SAI
    Hlásenský, I. (CZ)
    Kaštánek, František (UCHP-M) RID, SAI, ORCID
    Šolcová, Olga (UCHP-M) RID, ORCID, SAI
    Source TitleEnvironmental Science and Pollution Research - ISSN 0944-1344
    Roč. 27, č. 33 (2020), s. 42182-42188
    Number of pages7 s.
    Languageeng - English
    CountryDE - Germany
    Keywordsbrownfield remediation ; thermal desorption ; vermiculite
    Subject RIVCI - Industrial Chemistry, Chemical Engineering
    OECD categoryChemical process engineering
    R&D ProjectsTA04020700 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
    Method of publishingLimited access
    Institutional supportUCHP-M - RVO:67985858
    UT WOS000566047600008
    EID SCOPUS85090300730
    DOI10.1007/s11356-020-10696-1
    AnnotationIn this study, we report for the first time a novel type of sorbent that can be used for mercury adsorption from the air-based off-gasses-vermiculite impregnated with alkali polysulfides and thiosulfates. In contrast to other sorbents, vermiculite exhibits superior thermal stability in air and low adsorption capacity for organic vapors. This allows for a more favorable design of the soil remediation unit-direct coupling of thermal desorber with catalytic oxidizer using air as a carrier gas. In the bench-scale test at 180 degrees C, the sulfur/vermiculite sorbent exhibited significantly higher efficiency for the adsorption of mercury vapor from the off-gasses than the commercial sulfur/activated carbon sorbent at its highest operating temperature (120 degrees C). The average mercury concentration in the adsorber off-gas decreased from 1.634 mg/m(3) for the sulfur/activated carbon to 0.008 mg/m(3)achieved with impregnated vermiculite. The total concentration of organic compounds in the soil after thermal desorption was below the detection limit of the employed analytical method.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Year of Publishing2021
    Electronic addresshttp://hdl.handle.net/11104/0311984
Number of the records: 1