A chromate-contaminated site in southern Switzerland – Part 1: Site characterization and the use of Cr isotopes to delineate fate and transport

Wanner, Christoph; Eggenberger, Urs; Kurz, Daniel; Zink, Sonja; Mäder, Urs

doi:10.1016/j.apgeochem.2011.11.009

Cited by 49 publications

(53 citation statements)

References 24 publications

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“…Remediation techniques based on coprecipitation have been considered and/ or applied to, for example, waste water and waste materials (e.g. Curti, 1999;Hua et al, 2007;Wanner et al, 2012;Prieto et al, 2013) aiming at reducing the environmental mobility of Cr(VI). The amount of precipitated chromate measured in our samples obtained via the rapid Cr(VI)-calcite coprecipitation procedure, increased with increasing Cr concentration added at the beginning of the precipitation process (Table 3, Fig.…”

Section: Incorporation Of Chromium Into Calcitementioning

confidence: 99%

“…Cr isotopes have been employed in tracking contamination plumes (Blowes, 2002;Wanner et al, 2012), to trace the oxygenation of Earth's early atmosphere and hydrosphere (Frei et al, 2009(Frei et al, , 2012Bonnand et al, 2011;Crowe et al, 2013), the development of recently weathered soils (Berger and Frei, 2014), as well as the riverine Cr transport pathway and its relation to the open ocean (Bonnand et al, 2013). Cr is sensitive to pO 2 with the oxidation of Cr(III) to Cr(VI) typically catalyzed by MnO 2 leading to the mobilization of Cr(VI) (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fractionation behavior of chromium isotopes during coprecipitation with calcium carbonate: Implications for their use as paleoclimatic proxy

Rodler

Sánchez-Pastor

Fernández-Dı́az

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Incorporation Of Chromium Into Calcitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fractionation behavior of chromium isotopes during coprecipitation with calcium carbonate: Implications for their use as paleoclimatic proxy

Rodler

Sánchez-Pastor

Fernández-Dı́az

et al. 2015

Geochimica et Cosmochimica Acta

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“…Izbicki et al (2008Izbicki et al ( , 2012 traced Cr sources and Cr(VI) reduction in groundwater of the Mojave desert, USA. Berna et al (2010), Raddatz et al (2010), Gao et al (2010), andWanner et al (2012) used d 53 Cr data to provide evidence for Cr(VI) reduction in anthropogenic contaminant plumes.…”

Section: Introductionmentioning

confidence: 99%

Chromium isotope fractionation factors for reduction of Cr(VI) by aqueous Fe(II) and organic molecules

Kitchen

Johnson

Bullen

et al. 2012

Geochimica et Cosmochimica Acta

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“…CSIA has been used to study the fate of various groundwater pollutants, such as monoaromatic and polyaromatic hydrocarbons (Blum et al, 2009;Vieth et al, 2005;Griebler et al, 2004), MTBE (Kolhatkar et al, 2002;Zwank et al, 2005), chlorinated ethenes Sherwood Lollar et al, 2000), perchlorate (Sturchio et al, 2012), nitrate (Deutsch et al, 2006;Ging et al, 1996;Seiler, 2005;Zhang et al, 2012), and chromium (VI) (Wanner et al, 2012a). However, except for the identification of nitrate sources, it has so far not been used to examine diffuse pollution at the catchment scale.…”

Section: S R Lutz Et Al: Potential Use Of Csia In River Monitoringmentioning

confidence: 99%

A model-based assessment of the potential use of compound-specific stable isotope analysis in river monitoring of diffuse pesticide pollution

Lutz

Meerveld

Waterloo

et al. 2013

Hydrol. Earth Syst. Sci.

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Abstract. Compound-specific stable isotope analysis (CSIA) has, in combination with model-assisted interpretation, proven to be a valuable approach to quantify the extent of organic contaminant degradation in groundwater systems. CSIA data may also provide insights into the origin and transformation of diffuse pollutants, such as pesticides and nitrate, at the catchment scale. While CSIA methods for pesticides have increasingly become available, they have not yet been deployed to interpret isotope data of pesticides in surface water. We applied a coupled subsurface-surface reactive transport model (HydroGeoSphere) at the hillslope scale to investigate the usefulness of CSIA in the assessment of pesticide degradation. We simulated the transport and transformation of a pesticide in a hypothetical but realistic twodimensional hillslope transect. The steady-state model results illustrate a strong increase of isotope ratios at the hillslope outlet, which resulted from degradation and long travel times through the hillslope during average hydrological conditions. In contrast, following an extreme rainfall event that induced overland flow, the simulated isotope ratios dropped to the values of soil water in the pesticide application area. These results suggest that CSIA can help to identify rainfallrunoff events that entail significant pesticide transport to the stream via surface runoff. Simulations with daily rainfall and evapotranspiration data and one pesticide application per year resulted in small seasonal variations of concentrations and isotope ratios at the hillslope outlet, which fell within the uncertainty range of current CSIA methods. This implies a good reliability of in-stream isotope data in the absence of transport via surface runoff or other fast transport routes, since the time of measurement appears to be of minor importance for the assessment of pesticide degradation. The analysis of simulated isotope ratios also allowed quantification of the contribution of two different reaction pathways (aerobic and anaerobic) to overall degradation, which gave further insight into the transport routes in the modelled system. The simulations supported the use of the commonly applied Rayleigh equation for the interpretation of CSIA data, since this led to an underestimation of the real extent of degradation of less than 12 % at the hillslope outlet. Overall, this study emphasizes the applicability and usefulness of CSIA in the assessment of diffuse river pollution, and represents a first step towards a theoretical framework for the interpretation of CSIA data in agricultural catchments.

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A chromate-contaminated site in southern Switzerland – Part 1: Site characterization and the use of Cr isotopes to delineate fate and transport

Cited by 49 publications

References 24 publications

Fractionation behavior of chromium isotopes during coprecipitation with calcium carbonate: Implications for their use as paleoclimatic proxy

Fractionation behavior of chromium isotopes during coprecipitation with calcium carbonate: Implications for their use as paleoclimatic proxy

Chromium isotope fractionation factors for reduction of Cr(VI) by aqueous Fe(II) and organic molecules

A model-based assessment of the potential use of compound-specific stable isotope analysis in river monitoring of diffuse pesticide pollution

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