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Seyed Mahmoud Mousavi,Mohammad Ali Haj Asgarkhani,Ehsan Saljoughi 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.9
Cellulose acetate butyrate/TiO2 hybrid membranes were prepared via phase inversion by dispersing the TiO2 nanoparticles in casting solutions. The influence of TiO2 nanoparticles on the morphology and performance of membranes was investigated. The scanning electron microscope images and experiments of membrane performance showed that the membrane thickness and pure water flux were first increased by adding the TiO2 nanoparticles to the casting solution up to 4 wt% and then decreased with the addition of further nanoparticles to it. The obtained results indicated that the addition of TiO2 in the casting solution enhanced the rejection and permeate flux in filtration of bovine serum albumin solution. Furthermore, increasing the TiO2 nanoparticle concentration in the casting solution increased the flux recovery and consequently decreased the fouling of membrane.
Vahideh Ghaffarian,Seyed Mahmoud Mousavi,Maesumeh Bahreini,Hossein Jalaei 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
In this study, biodegradable polymer of poly (butylene succinate) (PBS) was blended with polyethersulfone (PES) to prepare a novel semi-biodegradable membrane. The effect of blend ratio and coagulation bath temperature (CBT) was investigated on membrane characteristics including membrane morphology, mechanical strength and also treatment ability. Moreover, Fourier transform infrared (FTIR) spectrum, thermal stability, biodegradation and contact angle of the membranes were studied. Results demonstrated that the wastewater permeation through the prepared membranes was increased by blending the polymers and reached to maximum at blend ratio of 50/50. The wastewater treatment of PES/PBS blend membranes was improved by increasing PBS content.
Fariba Sadat Kamelian,Seyed Mahmoud Mousavi,ALI AHMADPOUR,Vahideh Ghaffarian 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.8
In the present study, preparation of acrylonitrile-butadiene-styrene (ABS) membrane was investigated viaphase inversion method. ABS membrane is sensitive to preparation conditions. Therefore, the effect of solvent/nonsolventtype and concentration of additive and ABS was evaluated on the morphology, tensile strength and car washwastewater treatment. Polyethylene glycol was used as an additive. The results show that nonsolvent type significantlyaffects the morphology and consequently the flux and rejections of the pollution indices. Increasing concentration ofadditive and ABS in the casting solution leads to formation of denser and thinner membranes that have lower flux andhigher rejections of the pollution indices.
Use of membrane separation in enzymatic hydrolysis of waste paper
Narges Milani Rad,Seyed Mahmoud Mousavi,Masoumeh Bahreini,Ehsan Saljoughi 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.3
A three-stage process containing phosphoric acid pretreatment, enzymatic hydrolysis, and membrane filtration was performed on waste paper as a lignocellulosic material. In the first two stages, the effect of phosphoric acid concentration, enzyme loading, hydrolysis time, and substrate concentration on the amount of products was investigated. At the third stage using a proper membrane, the effect of substrate concentration and transmembrane pressure (TMP) on yield of the reducing sugars was studied. The novelty of the present study was to demonstrate the application of ultrafiltration membrane on the enzymatic hydrolysis process of waste paper. The reducing sugars concentration was determined by using the 3,5-dinitrosalicylic acid (DNS) reagent method. According to the results, a value of 0.5% was determined as the optimum concentration for phosphoric acid in the pretreatment stage. The reducing sugars yield was obtained as 67.4% in this concentration. Moreover, for the enzymatic hydrolysis of waste paper, the suitable amounts of cellulase enzyme loading and hydrolysis time were determined as 50 mg/g substrate and 48 h, respectively. In the filtration stage, increase of substrate concentration and decrease of TMP resulted in higher rejection of the reducing sugars. The experimental results revealed that the highest rejection was 19.2% at TMP of 3 bar and substrate concentration of 100 g/L.
Bahareh Rastegar,Ehsan Saljoughi,Seyed Mahmoud Mousavi,Shirin Kiani 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9
Hydrophilic membranes composed of polyphenylsulfone (PPSU)/polyethylene glycol hexadecyl ether (Brij-58), with noticeable properties and performance in the filtration of dye solution, were prepared for the first time. Scanningelectron microscopy (SEM) images were utilized to examine the morphology of the obtained membranes. Attenuatedtotal reflection Fourier-transform infrared (ATR-FTIR) spectra, water contact angle, water uptake capacity, andtensile properties of the membranes confirmed that Brij-58 remained in the structure of the obtained membranes dueto the high molecular weight of the additive. Higher water contact angle and water uptake capacity obtained withincreasing the Brij-58 concentration showed enhanced membrane hydrophilicity. The addition of Brij-58 and increasingits concentration was followed by a constant increase in pure water flux (PWF) and antifouling property of themembrane. According to the results, the incorporation of 10 wt% Brij-58 into the polymeric solution contributed toalmost 54-fold higher water flux and approximately 36% higher flux recovery ratio (FRR), while the rejection ofdisperse blue was only slightly reduced.