طراحی و سنتز نانوکامپوزیت سرامیکی بر بستر گاما آلومینای اصلاح‌شده به‌منظور حذف آلاینده‎های آلی از پساب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد مهندسی شیمی، دانشگاه صنعتی سهند

2 استادیار شیمی، پژوهشگاه نیرو

3 دانشیار مهندسی شیمی، دانشگاه صنعتی سهند

چکیده

در پژوهش حاضر، نانوکامپوزیت سه‌جزئی آلومینا/کیتوسان- خاک رس (Al/Cs/C) با استفاده از روش پلیمریزاسیون درجا سنتز شد و به‌عنوان یک جاذب کارامد و کم‌هزینه برای حذف آلایندۀ آنیونی رنگینۀ متیل اورانژ از محلول ­های آبی، ارزیابی و بررسی شد. آلومینای فعال یک جاذب متخلخل معدنی است که به‌عنوان پایۀ نانوکامپوزیت‌ مورد نظر انتخاب شد. به‌منظور بهبود خواص فیزیکی آلومینا و ساخت جاذب سازگار با محیط زیست، از زیست‌پلیمر کیتوسان به‌عنوان تقویت‌کنندۀ کامپوزیت استفاده شد. در ادامه برای افزایش ظرفیت جذب جاذب و اصلاح کامپوزیت از ذرات خاک رس بهره گرفته شد. آزمون­ های مختلفی شامل پراش پرتو ایکس (XRD)، طیف‌سنجی فرو سرخ (FTIR) و میکروسکوپ الکترونی روبشی نشر میدانی  (FESEM) برای مطالعۀ ساختار نمونه‌ها استفاده شد. با توجه به ایزوترم لانگمویر ظرفیت جذب بیشینه برای جاذب سنتزشده برابر با 33/133 میلی‎گرم بر گرم گزارش شد. سینتیک شبه درجۀ دوم در جذب سطحی یون متیل اورانژ بهترین تطابق را با داده ­های آزمایشگاهی داشته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Design and Synthesis of Ceramic Nanocomposites on Modified Gamma Alumina Substrate to Remove Organic Contaminants from Wastewater

نویسندگان [English]

  • Maryam Noormohammadi 1
  • Morteza Faghihi 2
  • Mohammad Zabihi 3
1 M. Sc. in Chemical Engineering, Sahand University of Technology
2 Assistant Professor of Niroo Research Institute
3 Associate Professor of Chemical Engineering, Sahand University of Technology
چکیده [English]

In the present study, three-component alumina-chitosan-clay nanocomposite (Al/Cs/C) using in situ polymerization method was evaluated as an efficient and a low-cost adsorbent for the removal of methyl orange dye as an anionic contaminant from aqueous solutions. Activated alumina is a porous mineral adsorbent that was selected as the substrate of the nanocomposite. In order to improve the physical properties of alumina and make an environmentally friendly adsorbent, chitosan biopolymer was used as a composite reinforcement. In continued, the clay particles were applied to increase the adsorption capacity of the adsorbent and modification of the composite. The various structural analysis including X ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM) were evaluated to study the morphology of the fabricated samples. The highest adsorption capacity for the prepared adsorbent was 133.33 mg/g, according to Langmuir isotherm. There is a good agreement between the pseudo second order kinetics and the experimental data.

کلیدواژه‌ها [English]

  • Adsorption
  • Nanocomposite
  • Alumina
  • Chitosan
  • Clay
  • Methyl Orange

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مهندسی شیمی ایران
دوره 21، شماره 121 - شماره پیاپی 121
خرداد و تیر 1401
صفحه 85-100

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