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A
Remote and Affordable Detection System for Cr(VI) in Groundwater--Eltron
Research, Inc., 4600 Nautilus Court South, Boulder, CO
80301-3241; 303-530-0263, www.eltronresearch.com
Dr.
Michael T. Carter, Principal Investigator,
Ms.
Eileen E. Sammells, Business Official, e
DOE
Grant No. DE-FG02-03ER83646
Amount:
$749,835
Chromium contamination is a widespread problem within the DOE
complex. This project will develop a
compact, portable, low-cost detection system for the electrochemical
monitoring of hexavalent chromium in groundwater.
The novel electrocatalytic approach employs robust, screen-printed
electrodes that can specifically detect Cr(VI) in the presence of Cr(III) using
a simple flow injection analysis system. The
monitoring system will provide a reliable and affordable detection scenario for
the evaluation and remediation of groundwater.
Phase I fabricated miniaturized sensors on chips, proved the technical
feasibility of the detection method, and characterized the sensor under a
variety of conditions including electrolyte concentration, electrolyte pH,
applied electrode potential, and flow rate.
Sensitivity, linear dynamic range, detection limits, and response times
for this amperometric method were determined and potential interferences present
in DOE groundwater were also investigated. During
Phase II, the methods and apparatus will be refined and optimized to produce a
robust, sensitive system for the reliable detection of hexavalent chromium in
groundwater.
Commercial
Applications and Other Benefits as
described by awardee: Electrochemical
detection of chromium(VI) in water should provide a low-cost, portable solution
for on-site, in situ testing in industrial and personal environmental
evaluations. The technology should
find applications in drinking water and wastewater analysis, process effluent
analysis, electroplating, metal finishing, and environmental remediation.