who can elaborate on this?
Iodine treatment should be used in conjunction with a prefiltering step if used on suspect water sources, due to its inability to inactivate bacteria that are attached to the surfaces of filterable materials.
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http://www.backpackgeartest.org/reviews/Water%20Treatment/Chemical%20Treatment/Pristine%20Water%20Purification/Dr.%20Ryan%20Jordan/Long%20Term%20Report/
PRISTINE WATER TREATMENT SYSTEM
FINAL REPORT
RYAN JORDAN
CONCLUSIONS
1. Pristine treatment resulted in an average reduction of bacteria attached to sediment/detritis surfaces of about 7 log units (i.e., if there were 10,000,000 bacteria initially present, their numbers were reduced to 1). Iodine resulted in a log reduction of about 2 units.
2. Pristine treatment effectively killed all bacteria not attached to sediment/detritis surfaces. Iodine resulted in a log reduction of approximately 3-4 units, leaving final bacterial concentrations of 1 – 1,000 organisms.
RECOMMENDATIONS
Iodine treatment should be used in conjunction with a prefiltering step if used on suspect water sources, due to its inability to inactivate bacteria that are attached to the surfaces of filterable materials.
Pristine is more effective than iodine at inactivating bacteria that are both attached and nonattached, within the limitations of this study.