 TECHNICAL
MEMORANDUM
MTBE (Methyl t-Butylether) Removal
Effectiveness
Seagull® IV water purifiers with RS-1SG Cartridge
A
single RS-1SG cartridge was evaluated for removal of MTBE over a
test duration of 1,000 gallons.
The Seagull IV system with RS-1SG cartridge was installed on a test
stand and operated for one minute on/one minute off at a flow rate
of one gpm.
At the selected test points, the system was removed from the test
stand and challenged by pumping one liter of water spiked with MTBE
into the system. Influent, Effluent and Blank (control) samples
were taken at each test point.
Samples were analyzed by a certified, outside testing laboratory
using gas chromatography, with a mass spectrometer (Methods 5242/8260A).
The laboratory reported that influent (before) levels were exceedingly
high, more than 500 to 700 times highest levels of MTBE reported
to date, and more than 800 times levels normally used in removal
evaluations. This resulted in atmospheric contamination in the lab
and initial saturation of the GC column. This may explain the slight
amount 0.003 mg/l detected at the 500 gallons point.
Results are as follows:
| Concentration
(mg/l) |
| Date |
Gallons
At Test |
Before |
After |
%
Reduction |
| 5/16/00 |
500 |
12.800 |
0.003* |
99.98 |
| 5/16/00 |
1,000 |
17.600 |
>0.002 |
99.99 |
Conclusion: As seen by the results, removal effectiveness,
even at these exceedingly high influent concentrations, was excellent.
|
