Spectroelectrochemical Sensor for Technetium Applicable to the Vadose Zone

Technical Report · Mon Jun 23 04:00:00 EDT 2003

DOI:https://doi.org/10.2172/811916· OSTI ID:811916

Heineman, William R ^[1]; Seliskar, Carl J; Bryan, Samuel A; Hubler, Timothy L

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1. University of Cincinnati, Dept. of Chemistry

The general aim of this project is to continue the design and implementation of a new sensor technology that offers the unprecedented levels of specificity needed for analysis of the complex chemical mixtures found at DOE sites nationwide. The new sensor concept combines the elements of electrochemistry, spectroscopy and selective partitioning into a single device that provides three levels of selectivity. The specific goal of this project is the development of a sensor for technetium (Tc) that is applicable to characterizing and monitoring the Vadose Zone and associated subsurface water at the Hanford site. The first goal is a sensor that determines technetium in the chemical form pertechnetate (TcO{sub 4}{sup -}). This report summarizes work during 6/16/01-6/15/02 of a three-year project that began on 9/15/99. During this period our efforts have focused on four areas that are discussed in the following sections. Electrochemistry of pertechnetate (TcO{sub 4}{sup -}) at bare ITO and film-coated ITO electrodes; Enhancing sensitivity by increasing analyte absorptivity; Development and characterization of selective films; and Improved field portable spectroelectrochemical sensor.

• Research Organization: University of Cincinnati, Dept. of Chemistry, P.O. Box 210172, Cincinnati, OH 45221-0172 (US)
• Sponsoring Organization: USDOE Office of Science (SC); USDOE Office of Environmental Management; Office of Science & Technology (US)
• DOE Contract Number: FG07-96ER62311
• OSTI ID: 811916
• Report Number(s): DOE-ER62311 (2003); ID: 070010
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTIVITY
DESIGN
ELECTROCHEMISTRY
GROUND WATER
HANFORD RESERVATION
MONITORING
PERTECHNETATE
PERTECHNETATES
SENSITIVITY
SENSOR
SOIL CHEMISTRY
SPECIFICITY
SPECTROELECTROCHEMISTRY
SPECTROMETERS
TECHNETIUM
VADOSE ZONE