ABSTRACT
Cellulose acetate (CA) and cellulose acetate phthalate (CAP) were used as additives (1â¯wt%, 3â¯wt%, and 5â¯wt%) to prepare polyphenylsulfone (PPSU) hollow fiber membranes. Prepared hollow fiber membranes were characterized by surface morphology using scanning electron microscopy (SEM), surface roughness by atomic force microscopy (AFM), the surface charge of the membrane was analyzed by zeta potential measurement, hydrophilicity by contact angle measurement and the functional groups by fourier transform infrared spectroscopy (FTIR). Fouling resistant nature of the prepared hollow fiber membranes was evaluated by bovine serum albumin (BSA) and molecular weight cutoff was investigated using polyethylene glycol (PEG). By total organic carbon (TOC), the percentage rejection of PEG was found to be 14,489â¯Da. It was found that the hollow fiber membrane prepared by the addition of 5â¯wt% of CAP in PPSU confirmed increased arsenic removal from water as compared to hollow fiber membrane prepared by 5â¯wt% of CA in PPSU. The removal percentages of arsenic with CA-5 and CAP-5 hollow fiber membrane was 34% and 41% with arsenic removal permeability was 44.42â¯L/m2h bar and 40.11â¯L/m2h bar respectively. The increased pure water permeability for CA-5 and CAP-5 hollow fiber membrane was 61.47â¯L/m2h bar and 69.60â¯L/m2â¯h bar, respectively.
Subject(s)
Arsenic/chemistry , Arsenic/isolation & purification , Cellulose/analogs & derivatives , Drinking Water/chemistry , Membranes, Artificial , Ultrafiltration/methods , Water Purification/methods , Cellulose/chemistry , Hydrophobic and Hydrophilic Interactions , Molecular Weight , Permeability , Porosity , Surface Properties , Water Pollutants, Chemical/chemistry , Water Pollutants, Chemical/isolation & purificationABSTRACT
In this work, poly(MBAAm-co-SBMA) zwitterionic polymer nanoparticles were synthesized in one-step via distillation-precipitation polymerization (DPP) and were characterized. [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA) as monomer and N, N'-methylene bis(acrylamide) (MBAAm) as cross-linker are used for the synthesis of nanoparticles. As far as our knowledge, this is the first such report on the synthesis of poly(MBAAm-co-SBMA) nanoparticles via DPP. The newly synthesized nanoparticles were further employed for the surface modification of polysulfone (PSF) hollow fiber membranes for dye removal. The modified hollow fiber membrane exhibited the improved permeability (56 L/ m2 h bar) and dye removal (>98% of Reactive Black 5 and >80.7% of Reactive orange 16) with the high permeation of salts. Therefore, the as-prepared membrane can have potential application in textile and industrial wastewater treatment.