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The rejection of anionic dyes and salt from water solutions using a polypropylene microfilter

✍ Scribed by John J. Porter; Arlindo C. Gomes

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 547 KB
Volume: 128
Category: Article
ISSN: 0011-9164
DOI: 10.1016/s0011-9164(00)00025-4

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✦ Synopsis

Previous work reported by this laboratory showed that inorganic membranes such as stainless steel and ceramic microfilters were capable of rejecting anionic dyes and sodium nitrate from water solutions. It was of interest to see if this were possible with organic membranes such as propylene microfilters. Experimental data are presented showing that a polypropylene microfilter will reject both salt and Direct Red 2 from aqueous solutions when the conductivity of the solution is below 500/~Siemens. The use of microfiltration to remove color is an important phenomenon considering that microfiltration comprises the largest fraction of the total membrane production in the world and is now used commercially for tertiary biological wastewater treatment. The effect ofpH and salt concentration on the filtration rate and color rejection is also presented.

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