Field Evaluation of an Electrochemical Probe for in Situ Screening of Heavy Metals in Groundwater

The use of an electrochemically based probe for in situ determination of heavy metals in groundwater is described. The in situ probe, consisting of a microlithographically fabricated iridium ultramicroelectrode array sensor (UMEA), a custom-built miniaturized potentiostat and microcontroller, is con...

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Bibliographic Details
Published in:Environmental science & technology 1998-01, Vol.32 (1), p.131-136
Main Authors: Herdan, Janet, Feeney, Rosemary, Kounaves, Samuel P, Flannery, Anthony F, Storment, Christopher W, Kovacs, Gregory T. A, Darling, R. Bruce
Format: Article
Language:English
Subjects:
Analysis methods
Applied sciences
Chemistry
Contamination
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
environmental degradation
Exact sciences and technology
Freshwater
Groundwater
Metals
natural resources
Natural water pollution
Pollution
Pollution, environment geology
waste management
water management
water resources
Water treatment and pollution
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Summary:The use of an electrochemically based probe for in situ determination of heavy metals in groundwater is described. The in situ probe, consisting of a microlithographically fabricated iridium ultramicroelectrode array sensor (UMEA), a custom-built miniaturized potentiostat and microcontroller, is connected to a laptop computer for control and data acquisition. The utility of this probe for rapid on-site screening of heavy metals was shown by conducting a proof-of-concept field demonstration at a metals contaminated landfill site located at Hanscom Air Force Base in Bedford, MA. Using the electroanalytical technique of square wave anodic stripping voltammetry (SWASV), the sensor was used to measure both the labile and total pH
ISSN:0013-936X
1520-5851
DOI:10.1021/es970389z