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- Title
Microfiltration of Anionic Dyes Using Titanium Dioxide Membranes on Porous Ceramic and Stainless Steel Tubes.
- Authors
Porer, John J.; Shuzhong Zhuang
- Abstract
Filtration studies using titanium dioxide membranes fused on porous ceramic and stainless steel tubes were performed for solutions of sodium nitrate and of the anionic dyes, C.I. Direct Red 2 and Acid Red 1. Results showed that the charge or ionic nature of the membrane surface was responsible for the ion rejections and decreased as the salt concentration was raised from 50 to 5000 ppm. Salt rejections ranged from 2-77% and dye rejections ranged from 19-99% over the salt concentrations and temperatures used. It was possible to correlate the Debye length in angstroms and the percent conductivity rejection versus the solution conductivity. It appears the same factors are influencing both variables because of the similarity of the curves and indicates that an equation similar to the Grahame equation would give a good correlation of the data.
- Subjects
TITANIUM dioxide; DYES &; dyeing; STAINLESS steel; STEEL tubes; IONS; SOLUTION (Chemistry)
- Publication
Textile Chemist & Colorist, 1997, Vol 29, Issue 4, p29
- ISSN
0040-490X
- Publication type
Article