Colloidal-facilitated transport of inorganic contaminants in ground water. Part 1. Sampling considerations. Research report, Feb 88-Sep 90

Technical Report · Sat Dec 01 04:00:00 EST 1990

OSTI ID:5615456

Puls, R W; Eychaner, J H; Powell, R M

Investigations at Pinal Creek, Arizona, evaluated routine sampling procedures for determination of aqueous inorganic geochemistry and assessment of contaminant transport by colloidal mobility. Sampling variables included pump type and flow rate, collection under air or nitrogen, and filter pore diameter. During well purging and sample collection, suspended particle size and number as well as dissolved oxygen, temperature, specific conductance, pH, and redox potential were monitored. Laboratory analyses of both unfiltered samples and the filtrates were performed by inductively coupled argon plasma, atomic absorption with graphite furnace, and ion chromatography. Scanning electron microscopy with Energy Dispersive X-ray was also used for analysis of the filtered particulates. Suspended particle counts consistently required approximately twice as long as the other field-monitored indicators to stabilize. High-flow-rate pumps entrained normally nonmobile particles. Differences in elemental concentrations using different filter-pore sizes were generally not large with only two wells having differences greater than 10 percent in most elemental concentrations, although trends showed increasing concentrations with increasing filter pore sizes in most wells. Similar differences (>10%) were observed for some wells when samples were collected under nitrogen rather than in air.

• Research Organization: Environmental Protection Agency, Ada, OK (USA). Robert S. Kerr Environmental Research Lab.
• OSTI ID: 5615456
• Report Number(s): PB-91-168419/XAB; EPA--600/M-90/023
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ARIZONA
CHEMISTRY
CHROMATOGRAPHY
COLLOIDS
CONTAMINATION
DEVELOPED COUNTRIES
DISPERSIONS
ELECTRON MICROSCOPY
ENVIRONMENTAL TRANSPORT
FEDERAL REGION IX
FIELD TESTS
GEOCHEMISTRY
GROUND WATER
HYDROGEN COMPOUNDS
ION EXCHANGE CHROMATOGRAPHY
MASS TRANSFER
MICROSCOPY
MOBILITY
MONITORING
NORTH AMERICA
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PH VALUE
POLLUTION
REDOX POTENTIAL
SCANNING ELECTRON MICROSCOPY
SEPARATION PROCESSES
SIZE
TESTING
USA
WATER
WATER POLLUTION