کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
153816 456540 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biosorption of acidic dyes from aqueous solution by Paenibacillus macerans: Kinetic, thermodynamic and equilibrium studies
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Biosorption of acidic dyes from aqueous solution by Paenibacillus macerans: Kinetic, thermodynamic and equilibrium studies
چکیده انگلیسی

Batch studies were conducted for thermodynamic, kinetics and equilibrium studies on the biosorption of Acid Blue 225 (AB 225) and Acid Blue 062 (AB 062) from aqueous solution by Paenibacillus macerans. The operating variables studied were initial dye concentration, biomass concentration, contact time, temperature and solution pH. Results show that the pH value of 1 is favorable for the biosorption of dyes. The biosorption data have been analysed using Langmuir, Freundlich and Tempkin isotherms. The isothermal data for biosorption followed Langmuir Model. The biosorption processes conformed to the pseudo-second-order rate kinetics. Thermodynamic parameters such as enthalpy, entropy, and Gibb's free energy changes were also calculated and it was found that the biosorption of dyes by Paenibacillus macerans was a spontaneous process. The biosorption mechanism of biomass was explained by FT-IR spectroscopy and the FT-IR spectrum confirmed the presence of –COOH, CO, and –NH2 groups in the biomass structure. The maximum adsorption efficiency of AB 225 and AB 062 is 94.98 mg g−1 and 95.08 mg g−1, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 150, Issue 1, 15 July 2009, Pages 122–130
نویسندگان
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