اصلاح غشاهای نانو تصفیه توسط نانوذره‌های آهن اکسید و گرافن اکسید

نوع مقاله : علمی-پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه اراک، اراک

چکیده

در این پژوهش تلاش شد با استفاده­ هم­زمان از نانوصفحه­ های گرافن اکسید و نانو ذره‌های آهن اکسید، ویژگی‌های غشاهای پلی اتر سولفون بهبود داده شود. برای این منظور غلظت­ های گوناگون نانوذره‌های Fe3O4 و GO با مجموع غلظت ثابت تهیه شد و اثر افزایش این نانوذره‌ها در شار آب خالص، پس­زنی Na2SO4 و ویژگی‌های ضد گرفتگی مورد بررسی قرار گرفت. برای تجزیه و تحلیل غشاها از طیف سنجی تبدیل فوریه فروسرخ، تصویرهای میکروسکوپ الکترونی روبشی نشر میدانی و میکروسکوپ نیروی اتمی استفاده شد. عملکرد جداسازی غشاها توسط آزمایش­ های زاویه تماس، اندازه ­گیری تخلخل، محتوای آب، شار آب خالص و همچنین پس ­دهی نمک مورد ارزیابی قرار گرفتند. نتیجه‌ها نشان داد که با افزایش نانوذره‌های آهن، شار آب خالص  از 12L /m2h در غشای اصلاح نشده به 48L /m2h در نسبت 375/0: 125/0 از نانوذره‌های Fe3O4:GO افزایش می ­یابد. افزون بر این، برای غشای M4 بیش­ترین میزان پس زنی Na2SO4 (61%) به دست آمد. همچنین بهترین ویژگی‌های ضد گرفتگی در غشا دارای 125/0 درصد وزنی از نانوذره‌های آهن اکسید و 375/0 درصد وزنی از نانوذره‌های گرافن اکسید  با نرخ بازیابی شار 85 درصد دیده شد.

کلیدواژه‌ها

موضوعات

مراجع

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