Separation of macromolecular proteins and removal of humic acid by cellulose acetate modified UF membranes.
Surface modifying macromolecules (SMMs) were synthesized with various polyurethane pre polymers end-capped with different groups and blended into the casting solution of cellulose acetate (CA) to prepare surface modified ultra-filtration (UF) membranes for water filtration applications. The surface modification of the CA membranes was confirmed by the FTIR and static contact angle (SCA) measurements. The membranes so prepared had the typical characteristics of UF membranes as confirmed by scanning electron microscopy (SEM). Membrane properties were studied in terms of membrane compaction, percentage water content (%WC), pure water flux (PWF), membrane hydraulic resistance (Rm), molecular weight cut-off (MWCO), average pore size and porosity. The result showed that PWF, %WC, MWCO and pore size increased whereas the Rm decreased by the addition of SMMs. The significant effect of SMMs on the fouling by humic acid (HA) was also observed. It was found that the cSMM-3 membrane, in which SMM was synthesized with diethylene glycol (DEG) and hydroxyl benzene sulfonate (HBS) was blended, had the highest flux recovery ratio FRR (84.6%), as well as the lowest irreversible fouling (15.4%), confirming their improved antifouling properties. Thus, the SMM modified CA membranes had proven, to play an important role in the water treatment by UF.
PG & Research Department of Chemistry, Polymeric Materials Research Lab, Alagappa Government Arts College, Karaikudi, 630 003, India.
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Kanagaraj
PG & Research Department of Chemistry, Polymeric Materials Research Lab, Alagappa Government Arts College, Karaikudi, 630 003, India. Electronic address: nagimmm@yahoo.com.
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Nagendran
Department of Chemical and Biological Engineering, Industrial Membrane Research Institute, University of Ottawa, 161 Louis Pasteur St., Ottawa, ON, K1N 6N5, Canada. Electronic address: rana@uottawa.ca.
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Rana
Department of Chemical and Biological Engineering, Industrial Membrane Research Institute, University of Ottawa, 161 Louis Pasteur St., Ottawa, ON, K1N 6N5, Canada.
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Matsuura
D057219:Biofouling; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D006812:Humic Substances / Q000032:analysis*; D046911:Macromolecular Substances / Q000302:isolation & purification*; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D008970:Molecular Weight; D016062:Porosity; D011506:Proteins / Q000302:isolation & purification*; D017550:Spectroscopy, Fourier Transform Infrared; D014462:Ultrafiltration / Q000379:methods*; D014867:Water / Q000737:chemistry
D006812:Humic Substances; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D011506:Proteins; D014867:Water; C005062:acetylcellulose; D002482:Cellulose
Cellulose acetate; Humic acid; Protein separation; Surface modifying macromolecules; Ultra-filtration