کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
150453 456450 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Congo Red adsorption by ball-milled sugarcane bagasse
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Congo Red adsorption by ball-milled sugarcane bagasse
چکیده انگلیسی

The adsorption of Congo Red (CR) by ball-milled sugarcane bagasse was evaluated in an aqueous batch system. CR adsorption capacity increased significantly with small changes in bagasse surface area. CR removal decreased with increasing solution pH from 5.0 to 10.0. Maximum adsorption capacity was 38.2 mg/g bagasse at a CR concentration of 500 mg/L. The equilibrium isotherm fitted the Freundlich model and the adsorption kinetics obeyed pseudo-second order equation. CR adsorption obeyed the intra-particle diffusion model very well with bagasse surface area in the range of 0.58–0.66 m2/g, whereas it was controlled by multi-adsorption stages with bagasse surface area in the range of 1.31–1.82 m2/g. Thermodynamic analysis indicated that the adsorption process is an exothermic and spontaneous process. Fourier transform infrared analysis of bagasse containing adsorbed CR indicated interactions between the carboxyl and hydroxyl groups of bagasse and CR function groups.


► CR adsorption capacity by ball-milled bagasse was 38.2 mg/g.
► Adsorption capacity increased with increasing bagasse surface area.
► Adsorption capacity was negatively affected by increasing pH.
► Adsorption by milled bagasse obeyed Freudlich isotherm and pseudo-second order model.
► Adsorption by balled-milled bagasse was exothermic and spontaneous.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 178, 15 December 2011, Pages 122–128
نویسندگان
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