ارزیابی عملکرد غشای نانو تصفیه پلی اتر سولفون/ تیتانیوم اکسید اصلاح شده به منظور تصفیه پساب دارای کروم سولفات

نوع مقاله : علمی-پژوهشی

نویسندگان

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

چکیده

در این پژوهش غشاهای نانوتصفیه ترکیبی با معرفی نانوذره‌های اولئیک اسید-تیتانیوم اکسید (OA-TiO2) بر پایه­ پلی اتر سولفون (PES) با استفاده از روش وارونگی فاز ساخته شدند. نخست نانوذره‌های (OA-TiO2) سنتز شدند و غلظت ­های گوناگون از نانوذره‌های سنتز شده برای تهیه­ غشاهای نانوتصفیه مورد استفاده قرار گرفتند. نانوذره‌های سنتز شده توسط طیف‌سنجی فروسرخ تبدیل فوریه (FT-IR)، میکروسکوپ الکترونی روبشی نشر میدانی (FESEM) و آنالیز XRD مشخص شدند. افزون بر این، ریخت‌شناسی غشاها با استفاده از تصویرهای FESEM و تصویرهای سه بعدی سطح مورد بررسی قرار گرفت. عملکرد جداسازی غشاها توسط زاویه تماس، شار آب خالص (PWF)، نسبت بازیابی شار (%FRR) و میزان پس­ دهی Na2SO4 و CrSO4 مورد ارزیابی قرار گرفت. بالاترین مقدار شار خالص آب (L/m2h 206/18) برای M2 با 42% افزایش در مقایسه با غشای PES بدون نانوذره به دلیل افزایش غلظت هیدرولیکی و پراکندگی بهتر نانوذره‌هایOA-TiO2  در فشار 5/4 مگاپاسکال به‌دست آمد. بالاترین مقدار پس ­دهیNa2SO4  (5/%81) برای M3 و بالاترین حذف CrSO4  (4/%80) برای M5 در فشار 5/4 مگاپاسکال آشکار شد که می­توان آن را به علت افزایش دافعه­ ی الکترواستاتیک و سازوکار­های جذب نسبت داد. ترکیب نانوذره‌های OA-TiO2 در PES باعث افزایش  %FRR  به 83%  و بهبود ویژگی‌ها ضد گرفتگی شد.

کلیدواژه‌ها

موضوعات


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