بررسی اثر اصلاح ساختاری فوم پلی‌یورتان با کربن فعال بر جذب آلاینده‌های نفتی از آب

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، دانشکده مهندسی شیمی، دانشگاه صنعتی اصفهان

2 دانشیار بیوتکنولوژی محیط زیست، دانشکده مهندسی شیمی، دانشگاه صنعتی اصفهان

چکیده

هدف از این پژوهش بررسی میزان جذب آلاینده‌های نفتی توسط فوم پلی‌یورتان و بررسی اثر اصلاح ساختاری آن با کربن فعال به‌صورت کامپوزیت بر درصد جذب و راندمان جذب آلاینده‌های نفتی بود. برای این کار ابتدا جاذب‌های خالص و کامپوزیت سنتز شدند و برای حذف نفت‌ خام از محلول‌های با غلظت‌های مختلف 20 تا 280 گرم در لیتر از نفت خام استفاده شد. نتایج آزمایش‌ها نشان داد که بهترین درصد وزنی کربن فعال در ساختار فوم پلی‌یورتان 5 درصد است که موجب افزایش درصد جذب تا 21 درصد شده است. حضور کربن فعال در ساختار فوم‌ها باعث افزایش شدید آب‌گریزی جاذب‌های کامپوزیت شد و راندمان جذب را در جاذب‌ کامپوزیت با 5 درصد کربن فعال تا 73 درصد در غلظت اولیه 20 گرم در لیتر از نفت خام افزایش داد. مطالعات تعادلی جذب نشان داد که برای تمامی جاذب‌ها، مدل‌های ردلیچ- پترسون و لانگمیر، داده‌های ایزوترم را بهتر توصیف می‌کنند. به‌منظور احیای جاذب‌ها از روش احیای شیمیایی با حلال‌های نفتی تولوئن و پترولیوم اتر استفاده شد که موجب افزایش راندمان و درصد جذب جاذب‌های فوم خالص و کامپوزیت شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Structural Modification of Polyurethane Foam by Activated Carbon on the Adsorption of Oil Contaminants from Water

نویسندگان [English]

  • Amir Ahmad Nikkhah 1
  • Hamid Zilouei 2
  • Ali Reza Keshavarz 1
1 . MSc Student, Department of Chemical Engineering, Isfahan University of Technology, Isfahan
2 Assoc. Prof. of Environmental Biotechnology, Isfahan University of Technology, Isfahan
چکیده [English]

This study investigates both the capacity of pure polyurethane foam in adsorbing oil contaminants and the effect of its structural modification by activated carbon (composite) on the performance of the foam in terms of adsorption capacity and efficiency. To this end, pure polyurethane foam and its activated carbon composites were synthesized and crude oil removal tests were conducted with initial crude oil concentrations of 20 to 280 g/L. Experimental results showed that the optimum weight percentage of activated carbon introduced into the foam structure was 5% wt, which enhanced adsorption capacity by up to 21%. The presence of activated carbon in the foam structure increased the hydrophobicity of the composites while, at the optimal concentration of activated carbon, its adsorption efficiency increased by up to 73% for an initial oil concentration of 20 g/L. Equilibrium studies showed that the Langmuir and Redlich-Peterson isotherms were the fitting ones for oil removal adsorption description. Chemical recovery of the sorbents used was performed using oil solvents (toluene and petroleum ether), which confirmed enhancement in both adsorption efficiency and capacity of the pure sorbent foam and the composite adsorbent.

کلیدواژه‌ها [English]

  • Oil contamination
  • Adsorption
  • Polyurethane Foam
  • Activated carbon
  • Composite

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