بهینه‌سازی تولید کربن فعال از پوست بادام در جذب آلاینده‌های محلول نفتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای مهندسی عمران- محیط زیست، دانشگاه تربیت مدرس، تهران

2 استاد، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس، تهران

3 دانشیار، دانشکده مهندسی عمران و محیط زیست، دانشگاه تربیت مدرس، تهران

چکیده

کربن فعال محصول ارزشمندی است که کاربردهای محیط‌زیستی‌ و صنعتی بسیاری دارد و لذا تولید آن از مواد زائد کم ارزش، یک اقدام اقتصادی- محیط‌زیستی‌ محسوب می‌شود. با توجه به تعدد عوامل مؤثر بر خواص جذبی کربن فعال تولیدی، به‌منظور شناخت عوامل اصلی تأثیرگذار و بهینه‌سازی فرایند تولید کربن فعال، از طراحی آزمایش به‌روش تاگوچی استفاده شد. بر اساس تحلیل نتایج در این روش، نسبت آغشتگی و عامل فعالساز در مقایسه با سایر عوامل، به‌ترتیب بیشترین تأثیر را بر عدد یدی کربن فعال‌ پوست بادام داشتند. در این تحقیق با بهینه‌سازی فرایند فعالسازی شیمیایی پوست بادام درختی، کربن فعال با عدد یدی 1331 میلی‌گرم بر گرم تولید شد. آزمایش‌های جذب نشان داد که سینتیک جذب هیدروکربن‌های محلول نفتی روی کربن فعال پوست بادام از واکنش مرتبه دوم تبعیت کرده و نزدیک به 95 درصد جذب طی 30 دقیقه اول اتفاق افتاده است. همچنین داده‌های ایزوترم جذب از مدل ایزوترم فروندلیچ به‌خوبی تبعیت کردند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Optimization of Activated Carbon Production from Almond Shell for Adsorption of Soluble Oil Contaminants

نویسندگان [English]

  • Amirhossein Sayyahzadeh 1
  • Hossein Ganjidoust 2
  • Bita Ayati 3
چکیده [English]

Activated carbon is a valuable product that has many industrial and environmental applications and therefore it’s production from cheap wastes, is an economic-environmental action. According to the multiplicity of factors that affect adsorption properties of produced activated carbon, the design of experiments via Taguchi method was used to identify the main factors and optimization of  activated carbon production. Based on the results, the impregnation ratio and activating reagent have the greatest impact on iodine number of almond shell activated carbon compared to other factors. In this study, activated carbon was produced with iodine number equal to 1331 mg/g, by optimization of chemical activation almond shell. Adsorption experiments showed that adsorption kinetics of dissolved petroleum hydrocarbons on activated carbon derived has followed from second-order reaction. Near to 95% of adsorption was happened during the first 30 minutes of process. Also the adsorption isotherm data were well followed from Freundlich isotherm model.

کلیدواژه‌ها [English]

  • Activated carbon
  • Chemical Activation
  • Petroleum Hydrocarbons
  • Adsorption
  • Almond Shell
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