مواد و فناوری‌های پیشرفته

مواد و فناوری‌های پیشرفته

ارزیابی سینتیکی حذف یون‌های فلزسنگین سرب از محلول‌ آبی به‌وسیله‌ی چهارچوب فلزی ـ آلی زیرکونیومی

نوع مقاله : مقاله کامل پژوهشی

نویسندگان
مهدی تکلو 1
سپهر شاکری زاده 1
ایمان مباشرپور 2
اسمعیل صلاحی 3
1 دانشجوی کارشناسی ارشد، پژوهشکده‌ی سرامیک، پژوهشگاه مواد و انرژی، کرج، ایران
2 دانشیار، پژوهشکده‌ی سرامیک، پژوهشگاه مواد و انرژی، کرج، ایران
3 استاد، پژوهشکده‌ی سرامیک، پژوهشگاه مواد و انرژی، کرج، ایران
10.30501/jamt.2026.568922.1352
چکیده
آلودگی فلزات سنگین به‌ویژه فلز سرب به ‌دلیل سمیت بالا، قابلیت تجمع در زنجیره‌های غذایی، پایداری شیمیایی و زیست‌تخریب‌ناپذیری به یکی از مهم‌ترین چالش‌های زیست‌محیطی و بهداشتی در سطح جهانی تبدیل شده است. ازاین‌رو، توسعه‌‌ی فناوری‌های کارآمد، اقتصادی و پایدار برای حذف این آلاینده‌های خطرناک از محیط‌های آبی اهمیت ویژه‌ای دارد. در این خصوص، پژوهش حاضر با سنتز و مشخصه‌یابی نوعی چهارچوب فلزی‌ ـ آلی زیرکونیومی (UiO-66) به‌عنوان جاذب با روش جذب سطحی به حذف کاتیون‌های فلزی دوظرفیتی سرب (Pb2+) از محلول آبی متمرکز شده است. همچنین، رفتار و سازوکار فرایند جذب ازطریق مدل‌های سینتیکی مختلف تحلیل شد. نتایج این پژوهش نشان داد که جاذب UiO-66 دارای ظرفیت جذب مناسبی معادل 46/114 میلی‌گرم بر گرم برای یون‌های Pb2+ است که بیانگر کارایی مناسب این ماده در جذب این نوع آلاینده‌ی فلزی است. تحلیل سینتیکی داده‌ها نشان داد که فرایند جذب به‌خوبی از مدل سینتیکی شبه‌مرتبه‌ی دوم (PSO) پیروی می‌کند که ضریب هم‌بستگی بسیار بالای آن (999/0= R2) گواه این امر است. در جمع‌بندی، این پژوهش ماده‌ی جاذب UiO-66 را به‌عنوان جاذبی پایدار و امیدبخش برای پالایش مؤثر آب‌های آلوده به سرب معرفی می‌کند.
کلیدواژه‌ها
چهارچوب فلزی ـ آلی
سولوترمال
سرب
جذب سطحی
مدل‌های سینتیکی
موضوعات

عنوان مقاله English

Kinetic Evaluation of the Removal of Heavy Metal Lead Ions from Aqueous Solution Using a Zirconium-Based Metal–Organic Framework (UiO-66)

نویسندگان English

Mahdi Takalo 1
Sepehr Shakerizadeh 1
Iman Mobasherpour 2
Esmaeil Salahi 3
1 MSc Student, Department of Ceramic, Materials and Energy Research Center, Karaj, Iran.
2 Associate Professor, Department of Ceramic, Materials and Energy Research Center, Karaj, Iran.
3 Professor, Department of Ceramic, Materials and Energy Research Center, Karaj, Iran.
چکیده English

Due to the high toxicity, chemical stability, bioaccumulation in food chains, and non-biodegradable nature of heavy metal contaminants, lead pollution, in particular, has emerged as one of the world's most significant environmental and public health issues. Therefore, the development of sustainable, economically viable, and efficient technologies for the removal of hazardous pollutants from water resources is of great importance. In this regard, the current study investigates the synthesis and characterization of a zirconium-containing metal-organic framework (UiO-66) as an adsorbent for the removal of divalent lead cations (Pb²⁺) from aqueous solutions through adsorption. In addition, the adsorption behavior and mechanism were investigated using various kinetic models. The results demonstrated that the UiO-66 adsorbent exhibits a considerable adsorption capacity of 114.46 mg/g for Pb²⁺ ions, indicating its effective performance in removing this heavy metal contaminant. Kinetic evaluation demonstrated that the adsorption behavior is best described by the pseudo-second-order model, with an excellent correlation coefficient (R² = 0.999), indicating that chemisorption predominates as the controlling mechanism of the process. In conclusion, the findings of this study introduce UiO-66 as a stable and promising adsorbent with significant potential for the efficient purification of lead-contaminated water.

کلیدواژه‌ها English

Metal-Organic Framework
Solvothermal
Lead
Adsorption
Kinetic Models
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مواد و فناوری‌های پیشرفته
دوره 15، شماره 1
بهار 1405
صفحه 1-14

  • تاریخ دریافت 06 دی 1404
  • تاریخ بازنگری 06 اسفند 1404
  • تاریخ پذیرش 26 اردیبهشت 1405