کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8869515 | 1622608 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of CO2 activated biochar from solid wastes of a beer industry and its application for methylene blue adsorption
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
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چکیده انگلیسی
An alternative activated biochar was developed from barley malt bagasse (BMB) through pyrolysis followed by CO2 activation. The materials BMB, biochar and activated biochar (CO2-biochar) were characterized and tested as adsorbents for the removal of methylene blue (MB) from aqueous solutions. Adsorption kinetics, equilibrium and thermodynamics were studied. It was found that BMB and biochar presented surface area values lower than 1â¯m2 gâ1, while CO2-biochar was a typical mesoporous material with surface area around 80â¯m2 gâ1. As consequence, the adsorption potential for methylene blue was in the following order CO2-biocharâ¯â«â¯biocharâ¯>â¯BMB. Adsorption kinetics of MB on CO2-biochar followed the pseudo-second order model. Langmuir presented the best fit with the equilibrium adsorption isotherms. The maximum adsorption capacity was 161â¯mgâ¯gâ1. MB adsorption on CO2-biochar was spontaneous, favorable and exothermic. Pyrolysis followed by CO2 activation was a suitable route to produce an alternative mesoporous adsorbent from barley malt bagasse.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 78, August 2018, Pages 630-638
Journal: Waste Management - Volume 78, August 2018, Pages 630-638
نویسندگان
Mauro A. Franciski, Enrique C. Peres, Marcelo Godinho, Daniele Perondi, Edson L. Foletto, Gabriela C. Collazzo, Guilherme L. Dotto,