Evaluation of four well-casing materials for monitoring selected trace-level organics in ground water
In this study we examined four well casing materials, polyvinyl chloride (PVC), teflon, stainless steel 304 (SS 304) and stainless steel 316 (SS 316), to determine their suitability for monitoring selected trace level organic constituents in ground water. Analyte solutions containing pieces of the different well casings were compared to controls that did not contain well casing material. The aqueous test solution contained approximately 2 mg/l of each of the following organic substances: hexahydro-1,3,5-triazine (RDX), trinitrobenzene (TNB), cis- and trans-1,2-dichlorobenzene(CDCE and TDCE), m-Nitrotoluene(MNT), trichloroethylene(TCE), chlorobenzene(CLB), and o-, p-, and m-dichlorobenzene(ODCB, PDCB, and MDCB). Mercuric chloride was added to prevent biodegradation of the analytes. The two sets of isomers for DCE and DCB were selected to examine the effect of structure on sorption. Samples were taken after 0 hour, 1 hour, 8 hours, 24 hours, 72 hours, 7 days (168 hours), and approximately 6 weeks (1000 hours). There was no loss of any analyte in the samples that contained either type of stainless steel casing, although both types of casing rusted. The greatest losses were seen in samples that contained teflon casings, especially for the chlorinated organics. Losses of PDCB and MDCB were the greatest, 16% and 18%, respectively, after only 8 hours. While losses were also observed for the samples containing PVC casing, the rate ofloss was much slower, and usually 24 hours or more elapsed before losses were significant (more than 5%). After the 1000-hour samples were taken, the casings were rinsed and placed in clean vials containing fresh water and left for three days to allow for desorption.
- Research Organization:
- Cold Regions Research and Engineering Lab., Hanover, NH (USA)
- OSTI ID:
- 6946244
- Report Number(s):
- AD-A-216502/5/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORINATED ALIPHATIC HYDROCARBONS
MONITORING
CHLORINATED AROMATIC HYDROCARBONS
GROUND WATER
CONTAMINATION
NITRO COMPOUNDS
TRIAZINES
WELL CASINGS
CHEMICAL COMPOSITION
COMPARATIVE EVALUATIONS
ECOLOGICAL CONCENTRATION
NITROBENZENE
PVC
SORPTION
STAINLESS STEEL-304
STAINLESS STEEL-316
TRACE AMOUNTS
WATER POLLUTION
ALLOYS
AROMATICS
AUSTENITIC STEELS
AZINES
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CHROMIUM-NICKEL-MOLYBDENUM STEELS
CORROSION RESISTANT ALLOYS
HALOGENATED ALIPHATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HEAT RESIS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HETEROCYCLIC COMPOUNDS
HIGH ALLOY STEELS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLLUTION
POLYMERS
POLYVINYLS
STAINLESS STEELS
STEEL-CR17NI12MO3
STEEL-CR19NI10
STEELS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)