Organic Analysis at the Hanford Nuclear Site

Campbell, James A.; Stromatt, R.W.; Smith, Mary Ellen; Koppenaal, David W.; Bean, R.M.; Jones, Thomas; Strachan, Denis M.; Babad, H.

doi:10.1021/ac00096a711

Cited by 39 publications

(11 citation statements)

References 5 publications

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“…Simulant Solution) and actual waste (Tank 241-C-112) at PNNL/Hanford, April 2000 • 30 presentations at scientific meetings • 14 original research articles published in scientific journals 3 The implications of this research are as follows:…”

Section: +mentioning

confidence: 99%

“…Introduction. The required remediation of over 300 underground nuclear waste storage tanks at USDOE sites together with the associated needs to characterize and monitor the chemical compositions of the tanks themselves presents a major scientific challenge (1)(2)(3)(4)(5)(6). In addition to the previously identified chemical complexity of such storage materials, the added dimensions of limited tank access and harsh chemical and radiological environment preclude the straightforward application of well-established laboratory-based chemical analysis techniques to this national problem.…”

Section: Technical Reportmentioning

confidence: 99%

“…The simulant solution, like the actual waste solution resulting from dissolution by elixir, is a complex, high pH (pH = 10) mixture with high concentrations of such oxyions as NO 3 − , NO 2 − , SO 4 2− , SO 3 2− , and PO 4 2− .…”

Section: ------------------------------------------------------------mentioning

confidence: 99%

“…[ 3 ] + passes all of the three levels of sensor interrogation. The capability of simultaneously monitoring the electrochemical and optical events of the rhenium complex, and by extension the analogous technetium complex, was demonstrated (18).…”

Section: +mentioning

confidence: 99%

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Design and Development of a New Hybrid Spectroelectrochemical Sensor

Heineman¹,

Seliskar²,

Ridgway³

1999

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Progress report RESEARCH OBJECTIVEThe general aim of this project is to design and implement a new sensor technology that offers the unprecedented levels of specificity needed for analysis of the complex chemical mixtures found at USDOE 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. We have had three major goals:• Demonstration of the general sensor concept on seven model systems • Development of a prototype sensor for ferrocyanide with associated instrumentation • Testing prototype sensor for ferrocyanide on waste tank simulant (U-Plant-2 Simulant Solution) provided by PNNL and then on actual tank waste (Tank 241-C-112) at PNNL/Hanford RESEARCH PROGRESS AND IMPLICATIONSThis report summarizes work during the period 9/15/96 to 9/14/00. The project was funded for three years; the fourth year was a no cost extension. During this time we accomplished the following goals:• Sensor concept demonstrated with an indium tin oxide coated glass guided wave device over-coated with the selective film The implications of this research are as follows:• Combining electrochemistry and spectroscopy in a single device to form a sensor with improved selectivity is feasible.• The spectroelectrochemical sensor concept is applicable to the analysis of complex samples such as are found at DOE sites, as demonstrated by the determination of ferrocyanide in real sample from a Hanford waste tank.• The sensor concept is broadly applicable; sensors for other compounds of interest to DOE could be developed.A no-cost extension of one year was requested to enable us to demonstrate the novel sensor concept for the determination of ferrocyanide on a real sample of tank waste at the Hanford site.To this end, a portable sensor package including a sensor microcell and associated instrumentation was developed and successfully demonstrated on Hanford tank simulant solution at the University of Cincinnati (UC). Based on this success, a UC graduate student, Mike Stegemiller, traveled to Hanford during the period April 1 -8, 2000, to test the sensor on simulant at the Radiochemical Processing Laboratory at PNNL. Working with our collaborator, Dr. Sam Bryan at PNNL, and a technician from PNNL, Mr. Richard Sell, Mr.Stegemiller was able to demonstrate that the sensor worked on their simulant solution. Based on that success, they analyzed a real sample from Tank 241-C-112 for ferrocyanide. The sensor gave a result of 1.0 mM ferrocyanide and the accepted FTIR method gave 0.67 mM. The relatively good agreement between the sensor and the laboratory method attests to the practical utility of this type of sensor for DOE needs. PLANNED ACTIVITIESBecause this grant has ended and the proposed research has been completed, no further experimental work is planned. Submission of manuscripts describing research from this project to scientific journals will continue until all results relating to this project have been published.This n...

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confidence: 99%

Section: Technical Reportmentioning

confidence: 99%

Section: ------------------------------------------------------------mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

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Design and Development of a New Hybrid Spectroelectrochemical Sensor

Heineman¹,

Seliskar²,

Ridgway³

1999

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“…In the past few years, the organic species present in core and auger samples from Hanford waste tanks have been quantitatively determined quite successfully at Pacific Northwest National Laboratory(a) (Campbell et al 1994a(Campbell et al , 1994b. Complete organic speciation of select waste tanks has provided very important information about the identity of organics added to the tanks and the degradation products formed by thermal and radiolytic aging.…”

Section: Introductionmentioning

confidence: 99%