Remediation of groundwater contaminated by chromium and arsenic at sites in the UK and Alaska

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Torrance, Keith and Keenan, Helen and Munk, LeeAnn (2010) Remediation of groundwater contaminated by chromium and arsenic at sites in the UK and Alaska. In: Scottish Environmental Technology Network Conference 2010, 2010-05-07 - 2010-05-07. (Unpublished)

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Abstract

Groundwater pollution by potentially toxic metals is an on-going issue in areas with a legacy of industrial or mining activity. Remediation of hexavalent chromium (Cr(+6)) to the less mobile and less toxic trivalent form (Cr(+3)) by chemical reduction may have the undesirable effect of mobilising other metal contaminants present in soil and groundwater. Arsenic, for example, can also be chemically reduced from the pentavalent As(+5) species, which is largely immobile, to the highly mobile trivalent As(+3) species, if a remediation process is set up with the sole purpose of addressing chromium contamination. The mobility of metal species, such as arsenic, is controlled by a wide range of chemical and bio-chemical parameters, as shown in Figure 1. This project will investigate the electro-chemical and bio-chemical environment needed to optimise remediation of mixed chromium and arsenic plumes, with an emphasis on nanoscale bio-mineralisation and bio-sorbants

ORCID iDs

Torrance, Keith ORCID logoORCID: https://orcid.org/0000-0002-2396-6575, Keenan, Helen ORCID logoORCID: https://orcid.org/0000-0003-0970-5392 and Munk, LeeAnn;
CORE (COnnecting REpositories)