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New Mexico State University URCAS 2008. Minority Access To Research Careers. “Water Purification by Modified Soil Sorbents”. By, Nicholas G. Beltran beltrann@nmsu.edu Mentor: Dr. Antonio S. Lara alara@nmsu.edu Department of Chemistry and Biochemistry.

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new mexico state university urcas 2008

New Mexico State UniversityURCAS 2008

Minority Access To Research Careers

water purification by modified soil sorbents

“Water Purification by Modified Soil Sorbents”

By,

Nicholas G. Beltran

beltrann@nmsu.edu

Mentor: Dr. Antonio S. Lara

alara@nmsu.edu

Department of Chemistry and Biochemistry

new mexico solution to a new mexico problem

New Mexico solution to a New Mexico problem

Appropriate solution

to uranium contamination has a great impact on citizens worldwide, especially New Mexicans and people along the US-Mexico border.

overall problem
Overall Problem
  • 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
specific problem
Specific Problem

Currently

fast,inexpensive

method

to remove uranium from water

DOES NOT EXIST

causes of the problem
Causes of the problem
  • Uranium is a naturally-occurring element
  • All are alpha emitters
  • If incorporated into the body may cause health effects
where can uranium be found
Where can uranium be found?
  • Rocks / Soil
  • Air
  • Water
  • Food
  • EPA Setting Standards for Safe Drinking water

(Uranium has a limit of 30 parts per billion)

effects of the problem
Effects of the problem
  • 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
effects of the problem1
Effects of the problem
  • 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.
causes of the problem1
Causes of the problem

Re-opening of U mines

With the re-opening of U mines, there will be an increase of exposure

possible solution
Possible Solution

SOILS WORK!

  • Readily Available
  • Manageable
  • Inexpensive
  • Large surface area
  • Cation Exchange Capacity

icp ms results
ICP/MS Results

Berino Soil

Gallup Soil

four corners new mexico
Four Corners / New Mexico

Gallup

Gallup

Grants

Grants

future research
Future Research
  • Inductively Coupled Plasma / Mass Spectrograph

Versus

  • 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
future research1
Future Research
  • LS 55 Luminescence Spectrometer
    • Phosphorescencemeasurement

Excitation

245 nm

Emission

515 nm

future research ls 55 luminescence spectrometer allows measurment of phosphorescence
Future ResearchLS 55 Luminescence SpectrometerAllows measurment of phosphorescence
  • Uranium Nitrate or

Uranyl Nitrate

UO2(NO3)2 • 6H2O

  • When exposed to ultraviolet light, U is visible as a faint green glow

Uranyl Nitrate 100 ppm phosphorescing

future research2
Future Research
  • LS 55 Luminescence Spectrometer
  • Laser Induced Breakdown Spectroscopy (LIBS)
  • QUASI
    • Binding site distribution
  • Inductively Coupled Plasma / Mass Spectrograph (ICP/MS)
future research3
Future Research
  • For a complete solution to uranium contamination
    • Bacterial Field Assay
      • Provide reliable detection of toxicity in potential drinking water.
  • Is there something else?
references acknowledgements
References&Acknowledgements
  • 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
thank you

Thank You

Any questions, comments, concerns?

water purification by modified soil sorbents1

“Water Purification by Modified Soil Sorbents”

By,

Nicholas G. Beltran

beltrann@nmsu.edu

Mentor: Dr. Antonio S. Lara

alara@nmsu.edu

Department of Chemistry and Biochemistry