فهرس المقالات Mixed Matrix Membrane

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  1 - Ultrasonic Assisted Removal of humic acids (HAs) from aqueous solutions on Uultrasonically polysulfone/ X% Fe2O3 mixed matrix membrane, An Experimental Design Methodology
  Fereydoon Khazali Shahnaz Davoudi
  10.30495/jptc.2023.72322.1258
  In the present study, the applicability of PSF/Fe2O3 mixed matrix membrane synthesis for eliminating humic acid rapidly from aqueous solutions. Identical techniques, including FT-IR, XRD and SEM has been utilized to characterize this novel material. The investigation sh أکثر

  In the present study, the applicability of PSF/Fe2O3 mixed matrix membrane synthesis for eliminating humic acid rapidly from aqueous solutions. Identical techniques, including FT-IR, XRD and SEM has been utilized to characterize this novel material. The investigation showed the applicability of PSF/Fe2O3 mixed matrix membrane as an available, suitable and low-cost adsorbent for proper deletion of humic acid from aqueous media. Also, the impacts of variables including initial humic acids (HAs) concentration (X1), pH (X2), adsorbent dosage (X3), sonication time (X4) came under scrutiny using central composite design (CCD) under response surface methodology (RSM). Additionally, the impacts of the pH of the solution, the amount of nanoparticles, concentration of humic acids (HAs), and contact time were investigated. The experiments have been designed utilizing response surface methodology. In this current article the values of 12 mg L-1, 0.03g, 7.0, 4.0 min were considered as the ideal values for humic acids (HAs) concentration, adsorbent mass, pH value and contact time respectively. The kinetics and isotherm studies proved the appropriateness of the second-order and Langmuir models for the kinetics and isotherm of the adsorption of humic acids (HAs) on the adsorbent. The adsorbent was proved to be recyclable for more than once. Since almost 99.5% of humic acids (HAs) was deleted with ideal adsorption capacities of 105 mg g−1 for humic acid (HAs). The overall results confirmed that PSF/Fe2O3 mixed matrix membrane could be a promising adsorbent material for humic acids (HAs) removal from aqueous solutions. تفاصيل المقالة
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  2 - Removal of Humic Acids (HAs) in Drinking Water by Adsorption onto Polysulfone/Fe2O3 Mixed Matrix Membrane: Study kinetics and Isotherm Analysis
  Moslem Rahmani piani Maryam Abrishamkar Bijan Mombini Godajdar Mina Hossieni
  The present study delineates the applicability of polysulfone/ X% Fe2O3 mixed matrix membranes as a low-cost and non-toxic natural adsorbent. It was used to remove humic acids (HAs) rapidly from aqueous solutions. The polysulfone/ X% Fe2O3 mixed matrix membranes were ch أکثر

  The present study delineates the applicability of polysulfone/ X% Fe2O3 mixed matrix membranes as a low-cost and non-toxic natural adsorbent. It was used to remove humic acids (HAs) rapidly from aqueous solutions. The polysulfone/ X% Fe2O3 mixed matrix membranes were characterized by BET, FT-IR, XRD, and SEM. The humic acids (HAs) removal by the developed adsorbent was investigated using the batch adsorption technique and all parameters influencing the removal efficiency such as dose of adsorbent and pH were considered. The optimal conditions for the humicacids (HAs) removal were found to be 5, 120-160 min, 10 mg/L, and 0.1 g for pH, contact time and adsorbent dosage respectively. The rapid adsorption of the humic acids (HAs) is an advantage of this adsorbent. The adsorption capacity of humic acids (HAs) onto polysulfone/ X% Fe2O3 mixed matrix membrane was reasonably constant in the pH range of 5–7 but decreased as the pH exceeded 5. Various isotherm models were used to fit the experimental equilibrium data. Equilibrium data obtained have been fitted to the Langmuir, Freundlich, and Dubinin–Radushkevich adsorptionisotherms. Langmuir's model best fits the experimental results. Kinetic modeling showed that the pseudo-second-order equation was the most appropriate for the description of humic acids (HAs) for PSF, PSF/5% Fe2O3, and PSF/10% Fe2O3 mixed matrix membrane were found to be 13.333, 10.309, and 7.874 mg/g, respectively. The overall results confirmed that polysulfone/ X% Fe2O3 mixed matrix membrane could be a promising adsorbent material for humic acids (HAs) removal from aqueous solutions. تفاصيل المقالة
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  3 - Evaluation of CO2/CH4 Gas Separation in PVA and PVC Mixed Matrix Membrane Permeation Models
  Elaheh Gandomkar Ghalhari Samaneh Koudzari Farahani Abdolreza Moghadassi Ezzatollah Joudaki Seyyed Mohsen Hosseini
  The purpose of this paper is to examine, predict and compare gas transport behavior of mixed matrix membranes (MMMs) combined with porous particles with different polymeric matrix. In this regard, composite flat sheet membranes are prepared from different amounts of pol أکثر

  The purpose of this paper is to examine, predict and compare gas transport behavior of mixed matrix membranes (MMMs) combined with porous particles with different polymeric matrix. In this regard, composite flat sheet membranes are prepared from different amounts of poly(Polyvinyl alcohol) (PVA) and poly vinyl chloride (PVC) Gas permeability were studied for the prepared membranes. Then these membranes modelled were performed by Maxwell, and the results of Maxwell model with the experimental data were compared and the percentage of error was shown. Studied results showed that despite higher permeability emissions of carbon dioxide with PVC membrane grid with carbon nanotubes in the membrane of PVA but Maxwell model for PVA membranes without any additive as a polymeric membrane has provided more acceptable results. تفاصيل المقالة
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  4 - مروری بر غشاهای نانوصافش بستر مختلط بر‎پایه پلی سولفون و پلی اترسولفون/ نانوذرات کربنی
  نادر غلامی حسین مهدوی
  باوجود‎آنکه فناوری غشایی نسبت به روش های متداول جداسازی، دارای مزایایی مانند توانایی حذف بالا، انعطاف پذیری عملیات، اثربخشی بهتر در جداسازی است، ولی گرفتگی محدودیت اصلی در به‎کارگیری بیشتر فناوری غشایی است که دلیل اصلی آن آب گریزی ذاتی مواد سازنده غشا است. برای أکثر

  باوجود‎آنکه فناوری غشایی نسبت به روش های متداول جداسازی، دارای مزایایی مانند توانایی حذف بالا، انعطاف پذیری عملیات، اثربخشی بهتر در جداسازی است، ولی گرفتگی محدودیت اصلی در به‎کارگیری بیشتر فناوری غشایی است که دلیل اصلی آن آب گریزی ذاتی مواد سازنده غشا است. برای غلبه بر این اشکال از غشاهای نانوچندسازه استفاده می شود. در بین فرایندهای غشایی، نانوصافش (NF) کاربردهایی در تصفیه انواع آب‎های زیرزمینی و سطحی، تصفیه پساب و پیش عملیات نمک زدایی دارد. از آنجا که فرایند NF در فشار پایین تری انجام می شود، از دید مصرف انرژی فرایندی بسیار با صرفه تر است. در این مقاله مروری، اصلاح غشاهای پلی سولفون/پلی اترسولفون در رابطه با عملکرد ضدگرفتگی و سازوکار کاهش گرفتگی برپایه روش‎های متفاوت اصلاح غشا بررسی شده است. این بررسی نشان می‎دهد که آب‎دوستی در سطح غشا پلی‎سولفون/پلی اترسولفون بهبود می یابد. همچنین، مطالعه‎ای جامع در باره ساخت غشاهای نانوچندسازه ای به‎دست آمده از به‎کارگیری نانوذرات در غشا بسپاری بستر مختلط، ویژگی و کاربرد آن ها با پرکننده های آلی (مانند گرافن و نانولوله کربنی) انجام شده است. روش های شناسایی به‎کارگرفته‎شده برای غشاهای اصلاح شده نیز موردبررسی قرارگرفته است. تفاصيل المقالة