Influence of ultrafiltration membrane characteristics on adsorptive fouling with dextrans
| Main Authors: | Susanto, Heru , Ulbricht, Mathias |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Terbitan: |
Elsevier
, 1995
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| Subjects: | |
| Online Access: |
http://eprints.undip.ac.id/36315/1/heru_JMS1.pdf http:// www.elsevier.com/locate/memsci/ http://eprints.undip.ac.id/36315/ |
Daftar Isi:
- This paper presents a detailed investigation of fouling mechanisms for ultrafiltration membranes with polysaccharides obtained by studying membraneâsolute (static adsorption) and membraneâsoluteâsolute interactions (ultraï¬ltration (UF)). Two polyethersulfone (PES) membranes and one stabilized cellulose (cellulosic) membrane with a nominal cut-off of 10 kg/mol and dextrans with average molar mass (M )of4, 10 and 15 kg/mol were used. The membranes before and after static adsorption of dextran were characterized by captive bubble contact angle and tangential streaming potential measurements as well as ultraï¬ltration sieving curves for polyethylene glycols. Signiï¬cant water ï¬ux reductions (4â15%), which also correlated with dextran molar mass, and changes of the other membrane characteristics occurred after static dextran adsorption for the PES membranes. An empirical model to describe the correlation between the relative water ï¬ux reduction and the concentration of solute had also been proposed. In contrast, no signiï¬cant changes could be detected for the cellulosic membrane. Signiï¬cant membraneâsolute interactions had also been conï¬rmed in the ultraï¬ltration experiments with dextrans where irreversible fouling had been observed for the PES but not for the cellulosic membranes. The results provide fundamental information for a better understanding of fouling by polysaccharides. In particular, it had been conï¬rmed that hydrophilic and neutral dextrans can signiï¬cantly foul PES membranes via adsorption to the surface of the membrane polymer. On this basis, methods for control of this fouling can be properly developed.