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      저자 : Amira Abdelrasoul (검색결과 2 건)
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        Prediction of power consumption and performance in ultrafiltration of simulated latex effluent using non-uniform pore sized membranes

        Amira Abdelrasoul,Huu Doan,Ali Lohi,Chil-Hung Cheng 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.3

        Tha aim of the present study was to develop a series of numerical models for an accurate prediction of the power consumption in ultrafiltration of simulated latex effluent. The developed power consumption model incorporated fouling attachment, as well as chemical and physical factors in membrane fouling, in order to ensure accurate prediction and scale-up. This model was applied to heterogeneous membranes with non-uniform pore sizes at a given operating conditions and mem- brane surface charges. Polysulfone flat membrane, with a membrane molecular weight cutoff (MWCO) of 60,000 dalton, at different surface charges was used under a constant flow rate and cross-flow mode. In addition, the developed models were examined using various membranes at a variety of surface charges so as to test the overall reliability and accuracy of these models. The power consumption predicted by the models corresponded to the calculated values from the experimental data for various hydrophilic and hydrophobic membranes with an error margin of 6.0% up to 19.1%.

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        Applications and mechanisms of free and immobilized laccase in detoxification of phenolic compounds - A review

        Amin Rostami,Amira Abdelrasoul,Zahra Shokri,Zeinab Shirvandi 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.4

        Phenolic compounds are present in different concentrations in the effluent from numerous industrial andagricultural activities. These compounds are harmful to living organisms due to their high toxicity, hence indicating aserious environmental concern. Although conventional methods such as chemical, physical, and physicochemical procedureshave been widely used for treating phenol-contaminated wastewaters, they are not useful owing to some shortcomings. Compared to conventional procedures, much attention has been recently devoted to enzymatic methodsbecause of high catalytic efficiency, mild operating conditions and environmentally friendly feature. Among variousenzymes, laccases have demonstrated a superior potential for removing phenolic contaminants. Thus, this review summarizesthe up-to-date literature on the use of free and immobilized laccases from different microbial source in thedegradation and remediation of phenolic pollutants in batch processes and continuous reactors. In general, examplesthrough the review approve that free laccases as well as immobilized laccases onto inorganic, organic (natural or synthetic)and hybrid supports show excellent performance in the remediation of phenolic compounds from wastewater. In contrast to immobilized laccases, free laccases suffer from high prices, low operative stability, and inability to recoverand reuse in their native forms. Moreover, the possible mechanisms associated with oxidation of phenolic compoundsby the laccase-catalyzed systems are assessed.

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