حذف سرب با نانو ساختارهای آلی فلزی آهن و بنزن تری کربوکسیلات از محلول آبی
الموضوعات :
1 - دانشگاه صنعتی قم
الکلمات المفتاحية: مواد آلی فلزی, تصفیه پساب , جذب سطحی, سرب, همدما,
ملخص المقالة :
فلزات سنگین به‌طور شیمیایی تخریب نمی‌شوند به‌منظور جلوگیری از ورود و انباشته شدن این آلاینده سمی همراه با پساب کارخانه‌ها به محیط زیست تاکنون روش‌های مختلفی بکارگیری شده است، ولی یافتن روش‌های نوین با کارایی بیشتر در این حوزه ضروری است. در این تحقیق دسته نوینی از ترکیبات موسوم به مواد آلی فلزی برای حذف سرب پساب صنعتی مورد استفاده قرار گرفته است. این مواد آلی فلزی، حاوی آهن و بنزن تری کربوکسیلات است. برای شناسایی مشخصات این مواد از تصاویر میکروسکوپ الکترونی و هم‌دماهای جذب و واجذب نیتروژن استفاده شده است. جهت تعیین شرایط بهینه به‌کارگیری این مواد در حذف سرب از پساب، اثر پارامترهای: زمان (10-120دقیقه)، مقدار جاذب (5/0-2/0میلی‌گرم بر لیتر)، (pH (5/12-5/3 و درجه حرارت (10-75سانتیگراد) بررسی شد. نتایج نشان می‌دهد که ترکیب MIL-100Fe)) دارای کارایی بهتری نسبت به دیگر مواد این تحقیق بوده و حذف کامل سرب با غلظت اولیه mg/l10 و با دوز جاذب mg/l25/0، در دمای 50 درجه سانتیگراد، 4/3 pH= و زمان تماس 120 دقیقه حاصل شد. ویژگی های دیگر این ماده در حذف سرب پساب صنعتی مانند: خواص مغناطیسی، قابلیت استفاده مجدد در پنج دوره متوالی، سطح وسیع، هزینه پائین، راندمان بالا و بکارگیری آسان، آن را گزینه ایده‌آلی برای استفاده در مقیاس گسترده ساخته است.
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