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ساخت غشاهای نانوفیلتراسیون بر پایه پلی‌اتر‌سولفون و اصلاح شده با نانوفیلرهای سیلیسی و کربنی برای افزایش کارائی شار و حذف آلاینده‌ها از پساب | ||
| نشریه مهندسی عمران امیرکبیر | ||
| دوره 54، شماره 3، خرداد 1401، صفحه 1175-1190 اصل مقاله (1.2 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/ceej.2021.19388.7155 | ||
| نویسندگان | ||
| فرزاد مهرجو1؛ افسانه شهبازی* 2؛ علیرضا پورخباز1 | ||
| 1دانشکده منابع طبیعی و محیط زیست، دانشگاه بیرجند، بیرجند، ایران | ||
| 2پژوهشکده علوم محیطی، دانشگاه شهید بهشتی، تهران، ایران | ||
| چکیده | ||
| فناوری نانوفیلتراسیون یک نوع فرآیند غشایی فشار محور میباشد که به دلیل ارزاﻥ بودن و سازگاری با محیط زیست برای حذف رنگهای آلی، فلزات سنگین و نمکها از پساب، مورد توجه بوده است. در این پژوهش از نانوفیلرهای سیلیسی PMO-PPD و کربنی CQDs در ساخت غشاء برای مقایسه کارائی آنها در سیستم نانوفیلتراسیون استفاده شد. با بررسی آنالیزهای FE-SEM، TEM، XRD، FTIR، زاویه تماس (Bare PES=63، نانوفیلرهای PMO-PPD=53/2 و CQDs=56/4 درجه)، تخلخل (Bare PES=66/7، نانوفیلرهای PMO-PPD=76/3 و CQDs=74 درصد) و اندازهگیری شعاع حفرات (Bare PES=3/68، نانوفیلرهای PMO-PPD=5/13 و CQDs=5/05 نانومتر)، سنتز موفقیت آمیز نانوفیلرها و حضور آنها در غشاهای ساخته شده تایید شدند. غشاهای ساخته شده با درصد وزنی0/5 درصد با مقادیر L/M2h 47/1 و 43/8 به ترتیب برای نانوفیلرهای PMO-PPD و CQDs شار بالاتری به نسبت غشاء فاقد نانوفیلر (Bare PES) با مقدار L/M2h 17/6 داشتند و آب دوستی بهتر این نانوفیلرها را نشان می دهد. پارامترهای ضدگرفتگی مشخص کردند که هر دو نانوفیلر خصوصیات ضدگرفتگی غشاء را بهبود بخشیدند. میزان حذف آلاینده ها برای غشاهای Bare PES (21/5 درصد NaCl، 61/5 درصد MO و 63/2 درصد Pb)، PES-PMO-PPD 0.5 wt.% (24/8 درصد NaCl، 85/2 درصد MO و 71/1 درصد Pb) و PES-CQDs 0.5 wt.% (27/93 درصد NaCl، 72/93 درصد MO و 89/76 درصد Pb) بودند. که درصد حذف آلاینده ها در غشاهای دارای نانوفیلر بیشتر از PES Bare بوده است. متفاوت بودن خصوصیات شار، ضدگرفتگی و حذف آلاینده ها از پساب برای مقایسه نانوفیلرهای PMO-PPD و CQDs، به دلیل تفاوت در نوع گروههای عاملی موجود در این دو نانوفیلر بوده است. نتایج نشان دادند که غشاهای ساخته شده برای فناوری نانوفیلتراسیون در جهت بهبود شار و حذف آلاینده ها از پساب بسیار کارآمد بوده است. | ||
| کلیدواژه‌ها | ||
| فناوری؛ شار؛ PMO-PPD؛ CQDs؛ ضدگرفتگی | ||
| موضوعات | ||
| آلودگی آب ، فاضلاب؛ مدیریت آب و فاضلاب شهری؛ مدیریت منابع آب؛ مهندسی آب و فاضلاب؛ مهندسی محیط زیست | ||
| عنوان مقاله [English] | ||
| Fabrication of nanofiltration membranes based on polyethersulfone and modified with silica and carbon nanofillers to increase the efficiency of flux and treatment of pollutants from wastewater | ||
| نویسندگان [English] | ||
| Farzad Mehrjo1؛ Afsaneh Shahbazi2؛ Alireza Pourkhabbaz1 | ||
| 1Environmental, Faculty of Environmental and Natural Resources, University of Birjand, Birjand, Iran. | ||
| 2SBU | ||
| چکیده [English] | ||
| Nanofiltration technology is a type of pressure-based membrane process that has been considered due to its cost and environmental compatibility to remove organic dyes, heavy metals, and salts from wastewater. In this study, nanofillers of PMO-PPD silica and carbon CQDs were used in the fabrication of membranes to compare their efficiency in the nanofiltration system. By successful analysis of FE-SEM, TEM, XRD, FTIR, contact angle (Bare PES = 63, nanofillers of PMO-PPD = 53.2 and CQDs = 56.4 °), porosity (Bare PES = 66.7, nanofillers of PMO-PPD = 76.3 and CQDs = 74 %), and measurement of pore radius (Bare PES = 3.68, nanofillers of PMO-PPD = 5.13 and CQDs = 05.05 nm), the successful synthesis of nanofillers and their presence in the fabricated membranes were confirmed. Fabricated membranes with a weight percentage of 0.5 % with values of 47.1 and 43.8 L/M2h for PMO-PPD and CQDs nanofillers, respectively, higher flux than membrane without nanofillers (PES Bare) with a value of 17.6 L/M2h and show better hydrophilicity of these nanofillers. Antifouling parameters showed that both nanofillers improved the antifouling properties of the membrane. Removal rate of contaminants were for the membranes of Bare PES (21.5 % NaCl, 61.5 % MO, and 63.2 % Pb), PES-PMO-PPD 0.5 wt.% (24.8% NaCl, 85.2 % MO, and 1 71.1 % Pb), and PES-CQDs were 0.5 wt.% (27.93 % NaCl, 72.93% MO, and 89.76% Pb). The percentage of contaminant removal in nanofiller membranes was higher than PES Bare. The different characteristics of flux, antifouling, and removal of contaminants from the wastewater for comparison of PMO-PPD and CQDs nanofillers were due to the difference in the type of functional groups in these two nanofillers. The results showed that the fabricated membranes for nanofiltration technology were very effective in improving the flux and removing contaminants from the wastewater. | ||
| کلیدواژه‌ها [English] | ||
| Technology, Flux, PMO-PPD, CQDs, Antifouling | ||
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| مراجع | ||
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