فصلنامه علمی کارافن

فصلنامه علمی کارافن

سنتز کربن فعال از پوست گردو با استفاده از فسفریک اسید برای حذف رنگ واکنشی قرمز درخشانHE-3B ازپساب‌های نساجی

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان
1 گروه آموزشی صنایع کاربردی، دانشگاه ملی مهارت، تهران، ایران.
2 گروه آموزشی هنر، دانشگاه ملی مهارت، تهران، ایران.
چکیده
در این مطالعه از پوست گردو به عنوان ماده خام اولیه برای سنتز جاذب کربن فعال استفاده و کارایی آن برای حذف رنگ واکنشی قرمز درخشانHE-3B ناشی از پساب‌های نساجی بررسی شد. آزمایش‌های تعادلی جذب در محدوده غلظتی 60-10 میلی‌گرم ‌بر ‌لیتر و در سه دمای 25، 35 و °C 45 انجام شد. بر طبق نتایج، در دماهای بالاتر ظرفیت جذب جاذب کاهش یافت. همچنین با افزایش غلظت رنگ، ظرفیت جذب افزایش و درصد حذف رنگ کاهش یافت. بر این اساس ظرفیت جذب در بیشترین حالت 55/33 میلی گرم بر گرم در غلظت 60 میلی گرم بر لیتر و حداکثر میزان جداسازی رنگ 7/87 درصد در غلظت 10 میلی‌گرم بر لیتر و در دمای °C25 بوده است. داده‌های تعادلی در سه دما، با هم‌دماهای لانگمایر و فرندلیچ مدل سازی شد، که در این میان مدل لانگمایر به طور کلی با ضریب همبستگی بالا تطابق بهتری با داده‌های تعادلی داشت. محاسبات ترمودینامیکی نشان داد فرایند جذب خودبه‌خودی(0> ΔG)، گرمازا (0>ΔH) و همراه با کاهش آنتروپی (0>ΔS) است. میزان آنتالپی واکنش 97/35- کیلوژول بر مول حاصل شد که نشان‌دهنده این است که جذب فیزیکی غالب بوده و نیروهای واندروالس نقش اصلی را بر عهده دارند. نتایج این مطالعه نشان داد که جاذب سنتز شده برای حذف رنگ واکنشی HE-3B از پساب‌های آبی موثر است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesis of activated carbon from walnut shell activated by phosphoric acid for reactive dye brilliant red HE-3B removal from textile wastewater

نویسندگان English

soodabeh khalili 1
Fatemeh Bagheri 1
Zoya Salahshoor 2
1 Department of Applied Industries engineering, Technical and Vocational University (TVU), Tehran, Iran.
2 Department of Arts, Technical and Vocational University (TVU), Tehran, Iran.
چکیده English

In the present work, walnut shell was used as the main raw material for synthesizing activated carbon adsorbent, and its efficiency was investigated for the removal of reactive dye Brilliant Red HE-3B from textile wastewater. Adsorption equilibrium experiments were conducted within the concentration range of 10–60 mg/L at three temperatures of 25, 35, and 45°C. According to the results, with the increase in temperature, the adsorption capacity decreases. Also, as the dye concentration increased, the adsorption capacity increased while the dye removal percentage decreased. The maximum adsorption capacity was 33.55 mg/g at an initial dye concentration of 60 mg/L, and the highest dye removal efficiency was 87.7% at C0=10 mg/L and a temperature of 25°C. Equilibrium data at the three temperatures were analyzed by the Langmuir and Freundlich isotherm models, and the Langmuir isotherm presented a better agreement according to the higher correlation coefficient. Thermodynamic calculations revealed that the adsorption process was spontaneous (Δ𝐺<0), exothermic (ΔH<0), and accompanied by a decrease in entropy (ΔS<0). The enthalpy of the reaction was obtained -35.97 kJ/mol, indicating that physical adsorption dominated and Van der Waals forces played a major role. The results of this study demonstrated that the synthesized adsorbent is effective for the removal of the reactive dye Brilliant Red HE-3B from aqueous wastewater.

کلیدواژه‌ها English

Adsorption
Activated carbon
reactive dye brilliant red HE-3B
thermodynamic studies
walnut shell
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دوره 22، شماره 3
فنی و مهندسی
پاییز 1404
صفحه 400-425

  • تاریخ دریافت 26 دی 1403
  • تاریخ بازنگری 10 فروردین 1404
  • تاریخ پذیرش 06 اردیبهشت 1404