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The fate of Cr(VI) in contaminated aquifers 65 years after the first spillage of plating solutions: A delta Cr-53 study at four Central European sites

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10365776" target="_blank" >RIV/00216208:11320/17:10365776 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/10.1016/j.catena.2017.07.004" target="_blank" >http://dx.doi.org/10.1016/j.catena.2017.07.004</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.catena.2017.07.004" target="_blank" >10.1016/j.catena.2017.07.004</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    The fate of Cr(VI) in contaminated aquifers 65 years after the first spillage of plating solutions: A delta Cr-53 study at four Central European sites

  • Popis výsledku v původním jazyce

    Chromium isotope systematics and concentrations of dissolved Cr were studied in shallow aquifers at four industrial sites in the Czech Republic, Central Europe. Chromium plating baths and wastewaters started to contaminate groundwater in the late 1940s. Since plating shops at all sites still operate, it was possible to determine the delta Cr-53 signatures of the plating baths. The mean delta Cr-53 values of the Cr plating baths, representing contamination sources, were 0.0 parts per thousand at Zlate Hory (ZH), 0.5 parts per thousand at Loucna nad Desnou (LD), 0.3 parts per thousand at Letnany (AV), and 0.1 parts per thousand at Velesin (JI). At all sites, groundwater Cr was isotopically heavier, compared to the contamination source, reflecting natural in-situ Cr(VI) reduction to insoluble Cr(III). The magnitude of the average positive isotope shift from the plating bath Cr(VI) to groundwater Cr-aq, mostly residual Cr(VI), was 1.1 parts per thousand, 1.3 parts per thousand, 3.3 parts per thousand and 3.3 parts per thousand at ZH, LD, AV, and JI, respectively. The mean concentration of Cr-aq was 0.43, 0.47, 2.38 and 4.32 mg L-1, respectively. AV and JI, the sites with lower residual Cr-aq concentrations in groundwater, had higher delta Cr-53 values, suggesting higher rates/efficiency of Cr(VI) reduction, and of toxicity removal. Simple Rayleigh models indicated that as much as 60% of Cr(VI) has been removed from the groundwater by spontaneous reduction at AV and JI. At ZH and LD, the same models indicated a 30% Cr removal from the solution. Even if uncertainties in model application and Cr fractionation factors are considered, it appears that natural attenuation at Cr(VI)-polluted sites can improve groundwater quality by tens of percent in a relatively short period of time of several decades.

  • Název v anglickém jazyce

    The fate of Cr(VI) in contaminated aquifers 65 years after the first spillage of plating solutions: A delta Cr-53 study at four Central European sites

  • Popis výsledku anglicky

    Chromium isotope systematics and concentrations of dissolved Cr were studied in shallow aquifers at four industrial sites in the Czech Republic, Central Europe. Chromium plating baths and wastewaters started to contaminate groundwater in the late 1940s. Since plating shops at all sites still operate, it was possible to determine the delta Cr-53 signatures of the plating baths. The mean delta Cr-53 values of the Cr plating baths, representing contamination sources, were 0.0 parts per thousand at Zlate Hory (ZH), 0.5 parts per thousand at Loucna nad Desnou (LD), 0.3 parts per thousand at Letnany (AV), and 0.1 parts per thousand at Velesin (JI). At all sites, groundwater Cr was isotopically heavier, compared to the contamination source, reflecting natural in-situ Cr(VI) reduction to insoluble Cr(III). The magnitude of the average positive isotope shift from the plating bath Cr(VI) to groundwater Cr-aq, mostly residual Cr(VI), was 1.1 parts per thousand, 1.3 parts per thousand, 3.3 parts per thousand and 3.3 parts per thousand at ZH, LD, AV, and JI, respectively. The mean concentration of Cr-aq was 0.43, 0.47, 2.38 and 4.32 mg L-1, respectively. AV and JI, the sites with lower residual Cr-aq concentrations in groundwater, had higher delta Cr-53 values, suggesting higher rates/efficiency of Cr(VI) reduction, and of toxicity removal. Simple Rayleigh models indicated that as much as 60% of Cr(VI) has been removed from the groundwater by spontaneous reduction at AV and JI. At ZH and LD, the same models indicated a 30% Cr removal from the solution. Even if uncertainties in model application and Cr fractionation factors are considered, it appears that natural attenuation at Cr(VI)-polluted sites can improve groundwater quality by tens of percent in a relatively short period of time of several decades.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10505 - Geology

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2017

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Catena

  • ISSN

    0341-8162

  • e-ISSN

  • Svazek periodika

    158

  • Číslo periodika v rámci svazku

    November

  • Stát vydavatele periodika

    DE - Spolková republika Německo

  • Počet stran výsledku

    10

  • Strana od-do

    371-380

  • Kód UT WoS článku

    000412252200034

  • EID výsledku v databázi Scopus

    2-s2.0-85026389493