Collect 200 L groundwater from FW021 pH = 3.25 Nitrate = 1,911 mg/L Uranium = 1.38 mg/L Tc-99 = 30,974 pCi/L Peristaltic pump FW021 Plastic tank Test Solution.

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Presentation transcript:

Collect 200 L groundwater from FW021 pH = 3.25 Nitrate = 1,911 mg/L Uranium = 1.38 mg/L Tc-99 = 30,974 pCi/L Peristaltic pump FW021 Plastic tank Test Solution Preparation

Tracer 100 mg/L Br - pH adjustment 8 g/L HCO 3 - Electron donor 20 mM glucose Observation Precipitate formed after HCO 3 - U decreased from ~ 10 to 2  M Tc decreased from 30,000 to 28,000 pCi/L Test Solution Preparation

Test solution mixing with N 2 :CO 2 gas (80 %:20%) Gas bubbles Sparge stones Compressed N 2 :CO 2

Sampling composition of test solution during injection Syringe Filtering samples