Metals in ground water: sampling artifacts and reproducibility
Technical Report
·
OSTI ID:7200228
Field studies evaluated sampling procedures for determination of aqueous inorganic geochemistry and assessment of contaminant transport by colloidal mobility. Research at three different metal-contaminated sites has shown that 0.45 um filtration has not removed potentially mobile colloids, when samples have been collected using low pumping flow rates (approx. 0.2-0.3 L/min). However, when pumping velocities greatly exceed formation groundwater flow velocities, large differences between filtered and unfiltered samples are observed, and neither are representative of values obtained with the low flow-rate pumped samples. There was a strong inverse correlation between turbidity and representativeness of samples.
- Research Organization:
- Environmental Protection Agency, Ada, OK (United States). Robert S. Kerr Environmental Research Lab.
- OSTI ID:
- 7200228
- Report Number(s):
- PB-92-227479/XAB; EPA--600/J-92/307
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COLLOIDS
CONTAMINATION
DATA COVARIANCES
DISPERSIONS
DISSOLVED GASES
ELEMENTS
ENVIRONMENTAL TRANSPORT
FILTRATION
FLOW RATE
FLUIDS
GASES
GROUND WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
METALS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
POLLUTION
PUMPING
SAMPLING
SEPARATION PROCESSES
SOLUTES
TURBIDITY
WATER
WATER POLLUTION
WATER WELLS
WELLS
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COLLOIDS
CONTAMINATION
DATA COVARIANCES
DISPERSIONS
DISSOLVED GASES
ELEMENTS
ENVIRONMENTAL TRANSPORT
FILTRATION
FLOW RATE
FLUIDS
GASES
GROUND WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
METALS
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
POLLUTION
PUMPING
SAMPLING
SEPARATION PROCESSES
SOLUTES
TURBIDITY
WATER
WATER POLLUTION
WATER WELLS
WELLS