کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7792584 1500656 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative study of calcium alginate, activated carbon, and their composite beads on methylene blue adsorption
ترجمه فارسی عنوان
بررسی مقایسه ای آلژینات کلسیم، کربن فعال و دانه های کامپوزیتی آنها بر جذب متیلن آبی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Three adsorbents, calcium alginate beads (AB), sodium hydroxide activated carbon based coconut shells (C), and calcium alginate/activated carbon composite beads (ACB) were prepared. Their textural properties were characterized by N2-adsorption at −196 °C and scanning electron microscopy. The porosity, surface area and total pore volume of C > ACB > AB, but AB adsorbent was more acidic function groups more than the other adsorbents. Adsorption experiments were conducted to examine the effects of adsorbent dosage, pH, time, temperature and initial concentration of methylene blue. Methylene blue adsorption on C, AB and ACB was observed at pH > 6 to avoid the competition of H+. The amount of dye adsorbed increases as the adsorbent dosage increase. Adsorption of dye follows pseudo-second order mechanism. Thermodynamic studies show spontaneous and endothermic nature of the overall adsorption process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 102, 15 February 2014, Pages 192-198
نویسندگان
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