بررسی آزمایشگاهی حذف ماده رنگزای کاتیونی بلور بنفش از آب با استفاده از کربن فعال تهیه شده از هسته و پوسته سنجد

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده مهندسی شیمی و نفت، دانشگاه تبریز، تبریز، ایران، صندوق پستی: 16471-51666

چکیده

حذف رنگزای بلور بنفش به کمک جاذب کربن فعال تهیه شده از هسته و پوسته سنجد مورد بررسی قرار گرفت. تأثیر پارامترهایی از قبیل دوز جاذب، زمان تماس، غلظت اولیه­ رنگزا، pH محلول و دما بررسی شد. نتایج نشان داد که بیش‌ترین مقدار حذف ماده رنگزا در 8=pH، دمای محیط، زمان تماس 45 دقیقه و دوز  g/l1 کربن فعال تهیه شده از هسته سنجد در محلول با غلظت اولیه رنگزا برابر با ppm 50 و دوز g/l 1.5 کربن فعال تهیه شده از پوسته سنجد در محلول با غلظت اولیه رنگزا برابر با ppm 30 اتفاق می­افتد. تحت شرایط بهینه، بازدهی حذف بلور­ بنفش توسط جاذب­های تهیه شده از هسته و پوسته سنجد، به ترتیب 98.67 و 96.22 درصد به دست آمد. حداکثر ظرفیت جذب برای جاذب­های تهیه شده از هسته و پوسته سنجد نیز به ترتیب 89.2 وmg/g  44.8 به دست آمد. نتایج آزمایش­ها به خوبی با مدل لانگمویر مطابقت داشت. همچنین مشخص گردید که فرآیند حذف رنگزای بلور بنفش از مدل سینتیکی شبه­مرتبه دوم پیروی کرده و فرآیند خودبخودی می­باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental Study on the Crystal Violet Dye Removal from Water Using Activated Carbon Prepared from Oleaster Seed and Peel

نویسندگان [English]

  • M.J. Athari
  • M. Tahmasebpoor
Faculty of Chemical and Petroleum Engineering, University of Tabriz, P.O. Box: 51666-16471, Tabriz, Iran
چکیده [English]

Crystal violet dye removal was investigated using activated carbon adsorbent prepared from oleaster peel and seed. The effects of the various parameters were examined, including the adsorbent dosage, the contact time, the initial dye concentration, pH, and temperature. The results showed that the maximum dye removal capacity occurred at a contact time of 45 minutes, pH=8, ambient temperature, the dose of 1 g/L, and initial dye concentration of 50 ppm for the adsorbent prepared from oleaster seed and the dose of 1.5 g/L and initial dye concentration of 30 ppm for the adsorbent prepared from oleaster peel. Under optimal conditions, the crystal violet dye removal efficiencies were obtained as
98.67 % and 96.22 % for adsorbents prepared from seed and peel, respectively. The maximum adsorption capacity for adsorbents prepared from oleaster seed and peel was 89.2 and 44.8 mg/g, respectively. The experimental results were in good agreement with the Langmuir isotherm. Moreover, it was found that the crystal violet dye removal followed the pseudo-second-order kinetic model as a spontaneous process.

کلیدواژه‌ها [English]

  • Crystal violet removal
  • Activated carbon
  • Adsorption
  • Oleaster seed
  • Oleaster peel

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