Removal of endotoxin from water by microfiltration through a microporous polyethylene hollow-fiber membrane.

Abstract:

:The microporous polyethylene hollow-fiber membrane has a unique microfibrile structure throughout its depth and has been found to possess the functions of filtration and adsorption of endotoxin in water. The membrane has a maximum pore diameter of approximately 0.04 micron, a diameter which is within the range of microfiltration. Approximately 10 and 20% of the endotoxin in tap water and subterranean water, respectively, was smaller than 0.025 micron. Endotoxin in these water sources was efficiently removed by the microporous polyethylene hollow-fiber membrane. Escherichia coli O113 culture broth contained 26.4% of endotoxin smaller than 0.025 micron which was also removed. Endotoxin was leaked into the filtrate only when endotoxin samples were successively passed through the membrane. These results indicate that endotoxin smaller than the pore size of the membrane was adsorbed and then leaked into the filtrate because of a reduction in binding sites. Dissociation of 3H-labeled endotoxin from the membrane was performed, resulting in the removal of endotoxin associated with the membrane by alcoholic alkali at 78% efficiency.

journal_name

Appl Environ Microbiol

authors

Sawada Y,Fujii R,Igami I,Kawai A,Kamiki T,Niwa M

doi

10.1128/AEM.51.4.813-820.1986

subject

Has Abstract

pub_date

1986-04-01 00:00:00

pages

813-20

issue

4

eissn

0099-2240

issn

1098-5336

journal_volume

51

pub_type

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