Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar
Biochar from peanut shell was used as the precursor for the preparation of porous biochar by KOH activation. The pore structures of porous biochar also were characterized by scanning electron microscopy (SEM) and N2 adsorption/desorption. The adsorption performance for the removal of methylene blue...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2015-03-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2836_Han_Methylene_Blue_Removal_Biochar |
| _version_ | 1818215338771218432 |
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| author | Xiangyun Han Lei Chu Shaomin Liu Tianming Chen Cheng Ding Jinlong Yan Liqiang Cui Guixiang Quan |
| author_facet | Xiangyun Han Lei Chu Shaomin Liu Tianming Chen Cheng Ding Jinlong Yan Liqiang Cui Guixiang Quan |
| author_sort | Xiangyun Han |
| collection | DOAJ |
| description | Biochar from peanut shell was used as the precursor for the preparation of porous biochar by KOH activation. The pore structures of porous biochar also were characterized by scanning electron microscopy (SEM) and N2 adsorption/desorption. The adsorption performance for the removal of methylene blue (MB) was deeply investigated. The effects of impregnation ratio (KOH/biochar: w/w), activation temperature, and activation time on the removal of methylene blue by porous biochar were evaluated. In addition, the effects of initial MB concentration and pH value on the adsorption process were also studied. The optimum conditions for preparing porous biochar were obtained with 1.5:1 of impregnation ratio, 800 °C of activation temperature, and 90 min of the holding time in activation. Results indicated that the adsorption capacity was high even at higher initial MB concentrations. The adsorption process followed pseudo-second-order kinetics. The experimental adsorption isotherm was found to be best fitted with the Langmuir model, which implying that the adsorption of MB by porous biochar proceeded as a monolayer adsorption, and the maximum monolayer adsorption capacity of MB was 208 mg∙g-1. |
| first_indexed | 2024-12-12T06:34:30Z |
| format | Article |
| id | doaj.art-a8e2f7c739b3418cbf07e360dfdc8259 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-12T06:34:30Z |
| publishDate | 2015-03-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-a8e2f7c739b3418cbf07e360dfdc82592022-12-22T00:34:31ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-03-011022836284910.15376/biores.10.2.2836-2849Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell BiocharXiangyun Han0Lei Chu1Shaomin Liu2Tianming Chen3Cheng Ding4Jinlong Yan5Liqiang Cui6Guixiang Quan7School of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environment and Earth, Anhui University of Science and Technology, Huainan 232001, P. R. China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaSchool of Environmental Science and Engineering, Yancheng Institute of Technology, 9 Yingbin Avenue, Yancheng 224051, China; ChinaBiochar from peanut shell was used as the precursor for the preparation of porous biochar by KOH activation. The pore structures of porous biochar also were characterized by scanning electron microscopy (SEM) and N2 adsorption/desorption. The adsorption performance for the removal of methylene blue (MB) was deeply investigated. The effects of impregnation ratio (KOH/biochar: w/w), activation temperature, and activation time on the removal of methylene blue by porous biochar were evaluated. In addition, the effects of initial MB concentration and pH value on the adsorption process were also studied. The optimum conditions for preparing porous biochar were obtained with 1.5:1 of impregnation ratio, 800 °C of activation temperature, and 90 min of the holding time in activation. Results indicated that the adsorption capacity was high even at higher initial MB concentrations. The adsorption process followed pseudo-second-order kinetics. The experimental adsorption isotherm was found to be best fitted with the Langmuir model, which implying that the adsorption of MB by porous biochar proceeded as a monolayer adsorption, and the maximum monolayer adsorption capacity of MB was 208 mg∙g-1.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2836_Han_Methylene_Blue_Removal_BiocharKOH activationAdsorption kineticsAdsorption isothermsThermodynamic modeling |
| spellingShingle | Xiangyun Han Lei Chu Shaomin Liu Tianming Chen Cheng Ding Jinlong Yan Liqiang Cui Guixiang Quan Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar BioResources KOH activation Adsorption kinetics Adsorption isotherms Thermodynamic modeling |
| title | Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar |
| title_full | Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar |
| title_fullStr | Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar |
| title_full_unstemmed | Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar |
| title_short | Removal of Methylene Blue from Aqueous Solution using Porous Biochar Obtained by KOH Activation of Peanut Shell Biochar |
| title_sort | removal of methylene blue from aqueous solution using porous biochar obtained by koh activation of peanut shell biochar |
| topic | KOH activation Adsorption kinetics Adsorption isotherms Thermodynamic modeling |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_2_2836_Han_Methylene_Blue_Removal_Biochar |
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