TY - JOUR
T1 - Adsorption studies of Dichloromethane on some commercially available GACs
T2 - Effect of kinetics, thermodynamics and competitive ions
AU - Khan, Moonis Ali
AU - Kim, Seong wook
AU - Rao, Rifaqat Ali Khan
AU - Abou-Shanab, R. A I
AU - Bhatnagar, Amit
AU - Song, Hocheol
AU - Jeon, Byong Hun
PY - 2010/6
Y1 - 2010/6
N2 - The objective of this work was to compare the effectiveness of four commercially available granular activated carbons (GACs); coconut (CGAC), wood (WGAC), lignite (LGAC) and bituminous (BGAC) for the removal of dichloromethane (DCM) from aqueous solution by batch process. Various parameters such as thermodynamics, kinetics, pH, concentration of adsorbate, dosages of adsorbent and competitive ions effect on DCM adsorption were investigated. Maximum adsorption capacity (45.5. mg/g for CGAC) was observed at pH 6.0-8.0. The kinetics data indicate better applicability of pseudo-second-order kinetics model at 25 and 35°C. Freundlich model was better obeyed on CGAC, WGAC, and BGAC, while LGAC followed Langmuir model. The adsorption process for 100. mg/L initial DCM concentration on CGAC was exothermic in nature. The adsorption of DCM on various adsorbents involves physical adsorption process. The adsorption of DCM over a large range of initial concentration on CGAC and LGAC is effective even in presence of ionic salts.
AB - The objective of this work was to compare the effectiveness of four commercially available granular activated carbons (GACs); coconut (CGAC), wood (WGAC), lignite (LGAC) and bituminous (BGAC) for the removal of dichloromethane (DCM) from aqueous solution by batch process. Various parameters such as thermodynamics, kinetics, pH, concentration of adsorbate, dosages of adsorbent and competitive ions effect on DCM adsorption were investigated. Maximum adsorption capacity (45.5. mg/g for CGAC) was observed at pH 6.0-8.0. The kinetics data indicate better applicability of pseudo-second-order kinetics model at 25 and 35°C. Freundlich model was better obeyed on CGAC, WGAC, and BGAC, while LGAC followed Langmuir model. The adsorption process for 100. mg/L initial DCM concentration on CGAC was exothermic in nature. The adsorption of DCM on various adsorbents involves physical adsorption process. The adsorption of DCM over a large range of initial concentration on CGAC and LGAC is effective even in presence of ionic salts.
KW - Dichloromethane
KW - Granular activated carbons
KW - Kinetics
KW - Point of zero charge
KW - Thermodynamics
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U2 - 10.1016/j.jhazmat.2010.02.032
DO - 10.1016/j.jhazmat.2010.02.032
M3 - Article
C2 - 20211523
AN - SCOPUS:77951498076
SN - 0304-3894
VL - 178
SP - 963
EP - 972
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -