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Minority Access To Research Careers
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By,Nicholas G. Beltran
Mentor: Dr. Antonio S. [email protected]
Department of Chemistry and Biochemistry
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Appropriate solution to uranium contamination has a great
impact on citizens worldwide, especially New Mexicans and people along the US-
Mexico border.
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Uranium is toxic Radioactivity Chemical toxicity
People are vulnerable to toxic uranium water – this is especially true in New Mexico
New Mexico is the uranium capital of the world (Grants, NM)
New surge in uranium mining expected
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Currently
FAST, INEXPENSIVE method
to remove uranium from waterDOES NOT EXIST
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Uranium is a naturally-occurring element
All are alpha emitters
If incorporated into the body may cause health effects
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Rocks / Soil
Air
Water
Food
EPA Setting Standards for Safe
Drinking water
(Uranium has a limit of 30 parts per
billion)
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Radioactive (U-235) Natural abundance 0.72%
Chromosomal damage
Alpha particles get into the body and are destructive to tissue and cells
Chromosomal breakage may result in translocation
Genetic mutations
May cause birth defects in future generations
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Chemical toxicity (U-238) Natural abundance 99.3%
Heavy metal chemistry (Poisonous to humans)
Kidney damage
U deposits in the brain from the blood stream
Risk for developing nervous system toxicity as a result of uranium accumulation in the brain.
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With the re-opening of U mines, there will be an increase of exposure
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Readily Available
Manageable
Inexpensive
Large surface area
Cation Exchange Capacity
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Gallup Soil•
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Gallup
Grants
Gallup
Grants
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Inductively Coupled Plasma / Mass SpectrographVersus
LS 55 Luminescence Spectrometer
ICP/MS
Very sensitive down to 1 ppb
But, volume does not remain constant
LS 55 Luminescence Spectrometer
Volume of the sample remains constant
Volume and Soil Surface Area used as a control
But, limit of detection ~500 ppb
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Emission515 nm
LS 55 Luminescence SpectrometerPhosphorescence measurement
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Uranium Nitrate or
Uranyl NitrateUO2(NO3)2 • 6H2O
When exposed to ultraviolet light, U is visible as a faint green glow
Uranyl Nitrate 100 ppm phosphorescing
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LS 55 Luminescence Spectrometer
Laser Induced Breakdown Spectroscopy (LIBS)
QUASI
Binding site distribution
Inductively Coupled Plasma / Mass Spectrograph (ICP/MS)
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For a complete solution to uranium contamination
Bacterial Field Assay
Provide reliable detection of toxicity in potential drinking water.
Is there something else?
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EPA. (2006) Uranium Location Database Compilation. EPA 402-R-05-009. Office of Radiation and Indoor Air, Radiation Protection Division (6608J), Washington, DC. Available at http://www.epa.gov/radiation/docs/tenorm/402-r-05-009.pdf
Southwest Research and Information Center (SRIC). (2007) Uranium Impact Assessment Program. Available at http://www.sric.org/uranium/
Environmental & Occupational Health. Available at http://www.gulflink.osd.mil/medsearch/EnviornmentalOccupationa/DepletedUranium_home.shtml
http://www.viaggimagazine.it/VM/guide/stati-uniti/cartina-new-mexico.jpg
National Institutes of Health (NIH) Grant No. GMO 7667-30
Minority Access to Research Careers (MARC) Program
Special thanks to Dr. Lara, Dr. Parra, Dr. Ulery
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Any questions, comments, concerns?
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By,Nicholas G. Beltran
Mentor: Dr. Antonio S. [email protected]
Department of Chemistry and Biochemistry