Comparison of delta53CrCr(VI) values of contaminated groundwater at two industrial sites in the eastern U.S. with contrasting availability of reducing agents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F18%3A00000173" target="_blank" >RIV/00025798:_____/18:00000173 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0009254118300457?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009254118300457?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemgeo.2018.01.033" target="_blank" >10.1016/j.chemgeo.2018.01.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of delta53CrCr(VI) values of contaminated groundwater at two industrial sites in the eastern U.S. with contrasting availability of reducing agents

Popis výsledku v původním jazyce

Natural attenuation of groundwater contaminated by toxic hexavalent chromium [Cr(VI)] was studied at two industrial sites in the eastern U.S. Concentration and isotope composition of the residual Cr(VI) were determined at site A in Connecticut whose aquifer was polluted by electroplating solutions between 1930 and 1995, and at site B in New Jersey whose aquifer was polluted by soluble chromium-processing wastes between 1911 and 1963. Site A was characterized by lower mean Cr(VI) concentrations (2 mg L-1) and lower mean delta53CrCr(VI) values (1.84 per mille) in groundwater than site B (200 mg L-1 and 2.89 per mille, respectively). delta53CrCr(VI) values were strongly positively correlated with dissolved organic carbon (DOC; p = 0.002), but not with dissolved ferrous iron [Fe(II)], or divalent manganese [Mn(II)], indicating that DOC may have played a major role in spontaneous reduction of the mobile carcinogenic Cr(VI) to immobile non-toxic Cr(III). At site B, the supply of DOC may be nearly unlimited, due to the presence of a buried organic meadow mat at a depth of six meters below the ground surface. At site A, contaminated groundwater has been extracted and treated since 1995. The mean delta53CrCr(VI) values of the residual aqueous contamination at site A significantly decreased over the past 15 years (p < 0.05), possibly suggesting re-oxidation and remobilization of previously precipitated pollutant Cr.

Název v anglickém jazyce

Comparison of delta53CrCr(VI) values of contaminated groundwater at two industrial sites in the eastern U.S. with contrasting availability of reducing agents

Popis výsledku anglicky

Natural attenuation of groundwater contaminated by toxic hexavalent chromium [Cr(VI)] was studied at two industrial sites in the eastern U.S. Concentration and isotope composition of the residual Cr(VI) were determined at site A in Connecticut whose aquifer was polluted by electroplating solutions between 1930 and 1995, and at site B in New Jersey whose aquifer was polluted by soluble chromium-processing wastes between 1911 and 1963. Site A was characterized by lower mean Cr(VI) concentrations (2 mg L-1) and lower mean delta53CrCr(VI) values (1.84 per mille) in groundwater than site B (200 mg L-1 and 2.89 per mille, respectively). delta53CrCr(VI) values were strongly positively correlated with dissolved organic carbon (DOC; p = 0.002), but not with dissolved ferrous iron [Fe(II)], or divalent manganese [Mn(II)], indicating that DOC may have played a major role in spontaneous reduction of the mobile carcinogenic Cr(VI) to immobile non-toxic Cr(III). At site B, the supply of DOC may be nearly unlimited, due to the presence of a buried organic meadow mat at a depth of six meters below the ground surface. At site A, contaminated groundwater has been extracted and treated since 1995. The mean delta53CrCr(VI) values of the residual aqueous contamination at site A significantly decreased over the past 15 years (p < 0.05), possibly suggesting re-oxidation and remobilization of previously precipitated pollutant Cr.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/GA15-21373S" target="_blank" >GA15-21373S: Izotopová hmotová bilance lokalit znečištěných chrómem podle poměru četnosti 53Cr/52Cr pevných a kapalných vzorků</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Chemical Geology

ISSN

0009-2541

e-ISSN

—

Svazek periodika

481

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

74-84

Kód UT WoS článku

000425892100007

EID výsledku v databázi Scopus

2-s2.0-85041578141