مهندسی شیمی ایران

مهندسی شیمی ایران

سنتز، ارزیابی و مطالعۀ سینتیک و ایزوترم جذب اکسید دوفلزی Fe-Mg برای حذف یون آرسنیک پنج‌ظرفیتی (As(V)) از محلول آبی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 کارشناسی ارشد مهندسی شیمی، دانشگاه صنعتی سهند
2 دانشیار مهندسی شیمی، دانشگاه صنعتی سهند
3 استادیار مهندسی شیمی، پژوهشگاه نیرو
چکیده
در پژوهش حاضر، سنتز نانوکامپوزیت اکسید دوفلزی Fe-Mg برای جذب سطحی یون آرسنیک پنجظرفیتی، بااستفادهاز روش ساده و یکمرحله­ای هم­رسوبی انجامشد. مشخصه‌یابی جاذب سنتزشده بااستفادهاز XRD، FT-IR، BET، EDX انجامشد. نتایج نشانداد که این جاذب دارای ساختاری آریخت (آمورف)، سطح فعال مناسب (149/52m2/g) و گروه‌های عاملی هیدروکسیل است که در حذف یون آرسنیک بسیار مؤثرند. بهعلاوه، نتایج BET نشانداد که جاذب ساختار متوسط روزنه دارد که برای حذف فلزات سنگین مناسب است. هم‌چنین، با بررسی تصاویر FESEM و TEM شکل نانوذرات آن بهصورت کروی و اندازۀ ذرات سنتزشده کمتر از 100nm تعیینشد. هم‌چنین، برای تعیین دقیق اندازۀ ذرات از نرمافزارهای بررسی تصاویر ریخت‌شناسی نیز استفادهشد. سینتیک و ایزوترم جذب، بررسی‌شد و ظرفیت جذب بیشینه بااستفادهاز ایزوترم لانگمویر 188/68mg/g بهدستآمد که ظرفیت جذب بسیار بالایی برای جذب یون آرسنیک است. بررسی مدل­های سینتیک جذب نشانداد که مدل سینتیک شبه درجۀ دوم با داده‌های تجربی انطباق بهتری دارد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Synthesis, Evaluation and Study of Kinetics and Adsorption Isotherm of Fe-Mg Bimetallic Oxide for As(V) Removal from Aqueous Solution

نویسندگان English

H. Malekzadeh 1
M. Zabihi 2
M. Faghihi 3
1 M. Sc. in Chemical Engineering, Sahand University of Technology
2 Associate Professor of Chemical Engineering, Sahand University of Technology
3 Assistant Professor of Chemical Engineering, Niroo Research Institute
چکیده English

In this study, a Fe-Mg bimetallic oxide nanocomposite was synthesized via a simple one-step co-precipitation method for As(V) adsorption.
The synthesized adsorbent was characterized using XRD, FT-IR, BET, and EDX. The results indicate an amorphous structure, proper surface area (149.52 m²/g), and the presence of hydroxyl functional groups, which are highly effective in arsenic ion removal. In addition, the BET results showed that the adsorbent has a mesoporous structure, which is suitable for the removal of heavy metals. Furthermore, examination of FESEM and TEM images revealed spherical nanoparticles with a size of less than 100 nm for the synthesized particles. Also, morphological image review software was used to determine the exact size of the particles.
The adsorption kinetics and equilibrium isotherms were investigated, revealing a maximum adsorption capacity of 188.68 mg/g using the Langmuir isotherm. This signifies a remarkably high adsorption capacity for arsenic ions. Examining the adsorption kinetics models showed that the pseudo-second order kinetic model has a better fit with the experimental data.

کلیدواژه‌ها English

Nanocomposite
Bimetallic Oxide
Adsorption
Arsenic Ion
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