شیمى کاربردى روز

شیمى کاربردى روز

بررسی جذب رنگ کریستال ویولت با جاذب کرایوژلی گرافن اکسید-باسورین

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
1 گروه شیمی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
2 گروه شیمی، واحد کرج ، دانشگاه آزاد اسلامی، کرج، ایران
3 گروه شیمی، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران
چکیده
در این پژوهش، یک کریوژل بر پایه باسورین و گرافن اکسید با نام گرافن اکسید-باسورین که با یون‌های کلسیم پیوند عرضی شده بود، تهیه و برای توانایی آن در حذف رنگ کریستال ویولت از محلول‌های آبی مورد بررسی قرار گرفت. این کریوژل با استفاده از روش ساده فریزدرایینگ ساخته شد و ویژگی‌های ساختاری و فیزیکوشیمیایی آن با روش‌های مختلفی از جمله پراش پرتو ایکس برای بررسی بلورینگی، میکروسکوپ الکترونی روبشی نشر میدانی برای مطالعه مورفولوژی، طیف‌سنجی مادون قرمز تبدیل فوریه برای شناسایی گروه‌های عاملی و آزمون برونوئر–امت–تلر برای تعیین سطح ویژه مورد آنالیز قرار گرفت. کارایی جذب تحت شرایط مختلف شامل زمان تماس، غلظت اولیه رنگ، مقدار pH، دما و دوز جاذب ارزیابی شد. نتایج نشان داد که کریوژل گرافن اکسید-باسورین بیشترین ظرفیت جذب 200،08 میلی گرم بر گرم را به دست آورد. بررسی‌های سینتیکی نشان داد که مدل شبه مرتبه اول بهترین انطباق را با داده‌ها دارد، در حالی که داده‌های تعادلی بیشترین تطابق را با ایزوترم لانگمویر نشان دادند. علاوه بر این، این ماده در طی پنج چرخه متوالی بازیابی، بازدهی بالای حذف رنگ را حفظ کرد. در مجموع، این کرایوژل به عنوان یک جاذب زیست‌تخریب‌پذیر و دوستدار محیط زیست با چشم‌انداز قوی برای کاربرد در تصفیه فاضلاب‌های آلوده به رنگ و سامانه‌های تصفیه صنعتی مطرح می‌شود.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Investigation of Crystal Violet Adsorption Using a Graphene Oxide–Bassorin Cryogel Adsorbent

نویسندگان English

sina azadi 1
hossein anarakiardakani 2
morteza rouhani 1
zohreh mirjafary 1
shahrzad abdolmohammadi 3
1 Department of Chemistry, SR.C, Islamic Azad University, Tehran, Iran
2 Department of Chemistry, Ka.C, Islamic Azad University, Karaj, Iran
3 Department of Chemistry, ST.C, Islamic Azad University, Tehran, Iran
چکیده English

In this research, a calcium-ion crosslinked cryogel based on Bassorin and graphene oxide (GO-BR) was prepared and examined for its potential to eliminate crystal violet (CV) from aqueous solutions. The cryogel was obtained through a straightforward freeze-drying technique and its structural and physicochemical properties were analyzed by multiple methods, including X-ray diffraction (XRD) to study crystallinity, field emission scanning electron microscopy (FESEM) to observe morphology, Fourier-transform infrared spectroscopy (FTIR) for functional groups, and Brunauer–Emmett–Teller (BET) analysis for surface area estimation. The adsorption efficiency was assessed under diverse conditions such as contact duration, starting dye level, pH value, temperature, and sorbent dosage. Results demonstrated that the GO-BR cryogel achieved a maximum uptake capacity of 200.08 mg/g. Kinetic investigations showed that the pseudo-first-order model best described the adsorption process, while the equilibrium behavior followed the Langmuir isotherm. Furthermore, the material sustained high removal efficiency through five successive regeneration cycles. Overall, GO-BR emerges as an environmentally friendly and biodegradable sorbent with strong prospects for scalable application in dye-contaminated wastewater treatment and industrial purification systems.

کلیدواژه‌ها English

Cryogel
Crystal Violet
Dye Adsorption
Natural Polymer
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