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Remediation and Treatment Technology Development and Support. Raul Dominguez Guillermo Brailly Mentor: Prabhakar Pant Florida International University Miami, FL. Agenda. Background Task Assigned Research on Mercury Speciation Laboratory Support Documentation Future Work Conclusion.
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Mentor: Prabhakar Pant
Florida International University
The study of Mercury concentration in soil samples collected from the Oak Ridge National Laboratories is important because it will help the analysis of the Total Maximum Daily Load (TMDL) as required by the U.S. Environmental Protection Agency (USEPA) and National pollutant discharge elimination system (NPDES).
The Hanford site lies beside the Columbia River. During WWII and the Cold War the Hanford site was used to create uranium fuel for the production of plutonium for the nations weapons program. The site is still contaminated to this day. The contaminants were expected to dissipate naturally, but they haven’t. This project is of high importance because by understanding the fate and transport of the uranium, where it goes, where it comes from, how much of it will attach to soil, and how much will dissolve into ground water, we will be able to prevent any further contamination.
1) The soil samples are kept frozen, in order to prevent any lose of Hg. Refrigeration keeps microorganism in the soil from turning the inorganic Hg into elemental Hg.
2) The samples are labeled to distinguish the depth and exactly where at Oak Ridge the samples were collected. This sample is labeled “MB E-10ft(M2)”
3) The samples retain a lot of moister during the refrigeration process, as can be seen by the ice in the soil.
4) When working with different samples I changed my gloves in between each sample to prevent errors caused by cross contamination.
5) If the samples get heated they begin to lose mercury. There fore we placed the samples in large beakers and set them to dry in a air sentry.
6) Paper towels were placed over the
samples to prevent cross contamination.
7) In order to obtain accurate results the samples must be homogenized thoroughly, after being air dried properly.
8) Once the samples have been homogenized they are taken back to the lab for analysis with the Direct Mercury Analyzer.
Soil samples set to dry on January 28, 2008
Chemical Properties of Mercury
to:Dr. Leonel Lagos - ARC,
Prabhakar Pant - ARC
and my partner.