مجله علوم، مهندسی و فناوری هسته‌ای

تهیه کامپوزیت گرافن اکسید- نیکل هگزاسیانو فرات برای حذف مؤثر استرانسیم از پسماندهای آبی: مشخصه‌یابی و کاربرد

نوع مقاله : مقاله پژوهشی

نویسندگان

نورالله دلیجه 1
طاهر یوسفی 2
حسن آقایان 2
مهدی پروینی 1
حسین قاسمی مبتکر 2
رامین یاوری 2

1 پژوهشکده مهندسی شیمی گاز و نفت، دانشگاه سمنان. کدپستی: 19111-35131، سمنان - ایران

2 پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران

https://doi.org/10.24200/nst.2023.1342
چکیده
در این پژوهش ابتدا گرافن اکسید به روش هامر تهیه گردید و سپس نانو ذرات نیکل هگزاسیانو فرات روی آن تثبیت شد. محصول به وسیله میکروسکوپ الکترونی روبشی (SEM) و طیف­‌سنجی مادون قرمز تبدیل فوریه (FTIR) مشخصه‌یابی شد. نتایج این مشخصه‌یابی، موفقیت­‌آمیز بودن تهیه گرافن اکسید و تثبیت نانوذرات بر روی آن را تأیید کردند. سپس ترکیب گرافن اکسید-نیکل هگزاسیانو فرات برای جذب یون استرانسیم از محیط آبی به روش پیمانه‌­ای استفاده شد. اثر پارامترهای مهم مانند pH، زمان و غلظت اولیه استرانسیم بر روی میزان جذب بررسی شد. بررسی اثر pH نشان داد که جذب استرانسیم در محدوده 1 تا 7 افزایش یافته و بعد از رسیدن به حداکثر جذب، ثابت و یا به طور ناچیزی کاهش می‌­یابد. در شرایط بهینه ظرفیت جذب حدود 140 میلی گرم بر گرم جاذب به دست آمد. داده­‌های سینتیکی جذب یون­‌های استرانسیم توسط گرافن اکسید اصلاح شده با مدل‌­های سینتیکی شبه مرتبه اول و شبه مرتبه دوم بررسی و نتایج نشان دادند که داده‌­های تجربی مطابقت بهتری با معادله سینتیکی شبه مرتبه دوم دارد (999/0=2(R. هم‌چنین نتایج نشان می‌­دهند که ایزوترم جذبی لانگمویر تطابق بهتری با فرایند جذب دارد (973/0=2(R. بنابراین می‌­توان گفت که نحوه پراکندگی جاذب در سطح و بین لایه‌­ها به صورت هموژن می‌­باشد و تثبیت جاذب با روش ذکر شده با پراکندگی مطلوب ذرات جاذب بر بستر گرافن اکسید انجام پذیرفته است. تخمین مقدار فاکتور جداسازی (1(0<RL< با استفاده از نمودار لانگمویر نشان می‌دهد که فرایند جذب یون بر روی سطح جاذب مطلوب می­‌باشد.

کلیدواژه‌ها

جذب
گرافن اکسید
نیکل هگزاسیانو فرات
استرانسیم
جاذب
پسماند آبی

عنوان مقاله English

Preparation of graphene oxide and nickel hexacyanoferrate composite for the effective removal of strontium ion from aqueous solution; characterization and application

نویسندگان English

N. Delijeh 1
T. Yousefi 2
H. Aghayan 2
M. Parvini 1
H. Ghasemi Mobtaker 2
R. Yavari 2
1 Gas and Petroleum Chemical Engineering School, Semnan University, Postal Code: 35131-19111, Semnan - Iran
2 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box:11365-8486, Tehran-Iran
چکیده English

In the current work, the graphene oxide was synthesized through Hummer’s method and modified with nickel hexacyanoferrate nanoparticles. The product was characterized by a Scanning Electron Microscope (SEM) and Fourier Transform Infrared spectroscopy (FTIR). The characterization results confirm the successful synthesis of graphene oxide and the immobilization of nanoparticles on it. The obtained graphene oxide-nickel hexacyanoferrate (GO-NiHCF) was applied for the removal of Sr(II) from the aqueous media in the batch method. The influence of effective factors such as pH, time, and initial concentration of strontium on adsorption was studied. The pH study showed that Sr(II) uptake increases in the pH range of 1-7 and the uptake reduces slightly or remains constant at higher pH values. The adsorption capacity under optimum conditions was obtained at about 140 mg g-1 adsorbent. The kinetic data of Sr(II) sorption by GO-NiHCF were investigated by pseudo-first-order and pseudo-second-order models. The results showed that the kinetic data fitted well to the pseudo-second-order rate model. The equilibrium data suggest the data are relatively fitted well to the Langmuir adsorption isotherm. Therefore, it can be understood that adsorbents’ dispersion on graphene oxide sheets or interlayers is homogenous. The separation factor(RL) value extracted from the Langmuir curve was estimated as 0<RL<1, showing the sorption behavior is favorable.

کلیدواژه‌ها English

Adsorption
Graphene oxide
Nickel Hexacyanoferrate
Strontium
Adsorbent
Wastewater
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