Mercury and Organic Carbon Interaction in Sediments

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Mercury and Organic Carbon Interaction in
Sediments

• DOE Fellow Amy Pahmer
• Mentor Weihua Zhang

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Overview

• Low East Fork Poplar Creek
• Mercury Speciation
• Elemental mercury Hg0
• Methyl mercury CH3Hg
• Total organic carbon
• The interaction between dissolved organic carbon
  and mercury

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Why is it done?

• Understand
• The Transformation fates of Hg
• Transport
• Potential remedial actions that could minimize
  the impact of mercury on the environment.

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What do we use?

• Sequential extraction
• Water, ammonium acetate, potassium hydroxide
• Centrifugal ultra-filtration device 
• Centrifuge separate substances of greater and
  lesser density
• ultra-filtration semi permeable membrane

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