Chromium isotope fractionations resulting from electroplating, chromating and anodizing: Implications for groundwater pollution studies

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43914730" target="_blank" >RIV/60461373:22310/17:43914730 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/17:00000165 RIV/60460709:41330/17:73836

Result on the web

<a href="http://dx.doi.org/10.1016/j.apgeochem.2017.03.009" target="_blank" >http://dx.doi.org/10.1016/j.apgeochem.2017.03.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apgeochem.2017.03.009" target="_blank" >10.1016/j.apgeochem.2017.03.009</a>

Result language

angličtina

Original language name

Chromium isotope fractionations resulting from electroplating, chromating and anodizing: Implications for groundwater pollution studies

Original language description

A number of shallow aquifers in industrial regions have been polluted by toxic Cr(VI). At some sites, spontaneous reduction of dissolved Cr(VI) to insoluble Cr(III) has been observed. Precipitation of nontoxic Cr(III) is accompanied by a Cr isotope fractionation, with the residual Cr(VI) becoming enriched in the heavier isotope Cr-53, and depleted in the lighter isotope Cr-52. Thus far, delta Cr-53 values of the contamination source have been poorly constrained. These values are needed to quantify the extent of Cr(VI) reduction in the aquifers. We present delta Cr-53 values of solutions generated during Cr-electroplating, chromating and anodizing at nine industrial sites. The source chemical, CrO3, had a mean delta Cr-53 of 0.0%(0). A small-to-negligible Cr isotope fractionation was observed between the solutions of the plating baths and the source chemical. Across all sample types, the mean delta Cr-53(VI) value was 0.2%(0). The mean delta Cr-53(VI) value of contaminated groundwater in the same region, studied previously, was significantly higher (2.9%o), indicating Cr(VI) reduction. Based on low delta Cr-53(VI) values of plating baths and rinsewaters as potential contamination sources, and their low variability, we suggest that most aquifer delta Cr-53(VI) values higher than 1.0%(0) are a result of in-situ Cr(VI) reduction. (C) 2017 Published by Elsevier Ltd.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/GA15-21373S" target="_blank" >GA15-21373S: Isotope mass balance for chromium-contaminated sites based on 53Cr/52Cr ratios of solid and liquid samples</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

Applied Geochemistry

ISSN

0883-2927

e-ISSN

—

Volume of the periodical

80

Issue of the periodical within the volume

5

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

134-142

UT code for WoS article

000400219000010

EID of the result in the Scopus database

2-s2.0-85016482843