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Ecologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition.

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    SYSNO ASEP0533136
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleEcologically Non-Invasive Decontamination of Natura 2000 Locality from Old Deposits of Hexavalent Chromium and Bivalent Nickel by Modular Electrocoagulation Combined with Ca(OH)2 Addition.
    Author(s) Krystyník, Pavel (UCHP-M) RID, SAI, ORCID
    Mašín, P. (CZ)
    Krušinová, Z. (CZ)
    Klusoň, Petr (UCHP-M) RID, ORCID, SAI
    Article number2894
    Source TitleWater. - : MDPI
    Roč. 12, č. 10 (2020)
    Number of pages13 s.
    Languageeng - English
    CountryCH - Switzerland
    Keywordselectrocoagulation ; water treatment ; site remediation
    Subject RIVCI - Industrial Chemistry, Chemical Engineering
    OECD categoryChemical process engineering
    R&D ProjectsTA04020130 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
    TH03030388 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
    Method of publishingOpen access
    Institutional supportUCHP-M - RVO:67985858
    UT WOS000585334900001
    EID SCOPUS85095978193
    DOI10.3390/w12102894
    AnnotationA modular electrocoagulation unit, supported by Ca(OH)2 addition to treated water, wasoperated in the vicinity of a Natura 2000 site for the removal of Cr6+ or Ni2+ from contaminated groundwater. The process was performed at a constant flow rate of 350 L/h. Day 0 concentrations of Cr6+ and Ni2+ started at 91.6 mg/L for Ni2+ and 43 mg/L for Cr and during testing, were decreased by 15%–25%. Residual concentrations of Crtot. and Ni2+ below the required limits of 0.5 mg/L for Crtot. and 0.8 mg/L for Ni2+ can be achieved with the electrocoagulation unit and total removal efficiencies often exceeded 98%. The overall economic assessment showed its feasible application for removal of Cr6+ and Ni2+ on sites with requirements of high environmental protection standards. The polluted area was about 150 × 150 m (22,500 m2), and it contained approximately 78,750 m3 of water contaminated with Cr6+ and Ni2+ (over 41 and 91 mg/L, respectively). The modular arrangement might allow a scaling up. The process’ output could be thus increased according to the number of EC modules in operation.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Year of Publishing2021
    Electronic addresshttps://www.mdpi.com/2073-4441/12/10/2894
Number of the records: 1  

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