scholarly journals Adsorption Isotherm and Kinetic Studies of Pentachlorophenol Removal from Aqueous Solution onto Coconut Shell-based Granular Activated Carbon

2018 ◽  
Vol 11 (2) ◽  
pp. 68-78
Author(s):  
Mohd Hafizuddin ◽  
Siti Rozaimah S ◽  
Hassimi Abu Hasan ◽  
Reehan Adnee Abd. ◽  
Siti Nur Hatika ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Isotherm ◽  
Granular Activated Carbon ◽  
Kinetic Studies ◽  
Coconut Shell

scholarly journals Adsorption of Phenol from Aqueous Solution Using Activated Carbon prepared from Coconut Shell

2017 ◽  
Vol 29 (1) ◽  
pp. 9-13
Author(s):  
Masuma Sultana Ripa ◽  
Rafat Mahmood ◽  
Sabrina Khan ◽  
Easir A Khan
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Isotherm ◽  
Iodine Number ◽  
Chemical Engineering ◽  
Coconut Shell ◽  
Physical Activation ◽  
Batch Adsorption ◽  
Adsorption Model ◽  
Solution Ph

Adsorption separation of phenol from aqueous solution using activated carbon was investigated in this work. The adsorbent was prepared from coconut shell and activated by physical activation method. The coconut shell was first carbonized at 800°C under nitrogen atmosphere and activated by CO2 at the same temperature for one hour. The prepared activated carbon was characterized by Scanning Electron Microscope (SEM) and BET Surface Analyzer and by the determination of iodine number as well as Boehm titration. The iodine number indicates the degree of relative activation of the adsorbent. The equilibrium adsorption isotherm phenol from aqueous solution was performed using liquid phase batch adsorption experiments. The effect of experimental parameters including solution pH, agitation time, particle size, temperature and initial concentration was investigated. The equilibrium data was analyzed using Langmuir and Freundlich adsorption model to describe the adsorption isotherm and estimate the adsorption isotherm parameters. The results indicate the potential use of the adsorbent for removal of phenol from the aqueous solution.Journal of Chemical Engineering, Vol. 29, No. 1, 2017: 9-13

scholarly journals Isotherms and Kinetic Studies on the Adsorption of Cd(II) onto Activated Carbon Prepared from Coconut (Cocos nucifera) Shell

2019 ◽  
Vol 40 ◽  
pp. 78-83
Author(s):  
Rajeshwar Man Shrestha ◽  
Sahira Joshi
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Cocos Nucifera ◽  
Kinetic Studies ◽  
Coconut Shell ◽  
Isotherm Models ◽  
Order Model ◽  
Batch Mode ◽  
Adsorbent Dose

Activated carbon prepared coconut shell using Phosphoric acid as an activating agent was investigated to find the feasibility ofits application for removal of Cd(II) from aqueous solution through the adsorption process. The activated carbon thus prepared has been characterized by SEM, XRD, FTIR. SEM morphology has revealed the pores of different diameters while FTIR showed the presence of surface functional groups such as carboxyl, phenolic and lactones. Batch mode kinetics and isotherm studies were carried out to evaluate the effects of contact time, adsorbent dose and pH. The optimum pH, contact time and adsorbent dose needed for the adsorption of the heavy metal have been found to be 6, 180 minutes and 2 g/L respectively. Langmuir and Freundlich isotherm models have been employed to analyze the adsorption equilibrium data. It was found that the adsorption isotherm of Cd(II) onto the activated carbon was the best described by Langmuir with an adsorption capacity of 33.71 mg/g. Kinetic studies showed that a pseudo second-order model was more suitable than the pseudo first-order model. It has been concluded that the activated carbon prepared from coconut shell can be used as an effective adsorbent for the removal of Cd(II) from aqueous solution.

scholarly journals Adsorption Study of Cobalt on Treated Granular Activated Carbon

2012 ◽  
Vol 9 (1) ◽  
pp. 335-339 ◽  
Author(s):  
Y. V. Hete ◽  
S. B. Gholase ◽  
R. U. Khope
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Isotherm ◽  
Benzoic Acid ◽  
Granular Activated Carbon ◽  
Freundlich Isotherm ◽  
Adsorption Study

This study is carried out for the removal of cobalt from aqueous solution using granular activated carbon in combination withp-nitro benzoic acid at temperature 25±1°C. The adsorption isotherm of cobalt on granular activated carbon has been determined and the data fitted reasonably well to the Langmuir and Freundlich isotherm for activated carbon.

Surface modified granular activated carbon for enhancement of nickel adsorption from aqueous solution

2009 ◽  
Vol 26 (6) ◽  
pp. 1748-1753 ◽  
Author(s):  
Sang-Hoon Byeon ◽  
Dhamodaran Kavitha ◽  
Kanagasabai Ponvel ◽  
Kyung-min Kim ◽  
Chang-Ha Lee
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Surface Modified ◽  
Nickel Adsorption

Simultaneous adsorption of nitrogenous heterocyclic compounds by granular activated carbon: parameter optimization and multicomponent isotherm modeling

RSC Advances ◽  
2014 ◽  
Vol 4 (75) ◽  
pp. 39732-39742 ◽  
Author(s):  
Ajay Devidas Hiwarkar ◽  
Vimal Chandra Srivastava ◽  
Indra Deo Mall
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Parameter Optimization ◽  
Heterocyclic Compounds ◽  
Granular Activated Carbon ◽  
Isotherm Modeling ◽  
Simultaneous Adsorption ◽  
Multicomponent Isotherm

Granular activated carbon used for simultaneous adsorption of pyrrole and indole from aqueous solution.

scholarly journals Adsorption of Nitrate onto ZnCl2-Modified Coconut Granular Activated Carbon: Kinetics, Characteristics, and Adsorption Dynamics

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Lingjie Liu ◽  
Min Ji ◽  
Fen Wang
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Kinetic Studies ◽  
Surface Characteristics ◽  
Electrostatic Attraction ◽  
Batch Adsorption ◽  
Dynamic Adsorption ◽  
Batch Experiments ◽  
Nitrate Adsorption ◽  
Pseudo Second Order

Coconut granular activated carbon (CGAC) was modified by impregnating with ZnCl2solution to remove nitrate from aqueous solutions. Sorption isotherm and kinetic studies were carried out in a series of batch experiments. Nitrate adsorption of both ZnCl2-modified CGAC and CGAC fitted the Langmuir and Freundlich models. Batch adsorption isotherms indicated that the maximum adsorption capacities of ZnCl2-modified CGAC and CGAC were calculated as 14.01 mgN·g−1and 0.28 mgN·g−1, respectively. The kinetic data obtained from batch experiments were well described by pseudo-second-order model. The column study was used to analyze the dynamic adsorption process. The highest bed adsorption capacity of 1.76 mgN·g−1was obtained by 50 mgN·L−1inlet nitrate concentration, 20 g adsorbents, and 10 ml·min−1flow rate. The dynamic adsorption data were fitted well to the Thomas and Yoon–Nelson models with coefficients of correlationR2 > 0.834 at different conditions. Surface characteristics and pore structures of CGAC and ZnCl2-modified CGAC were performed by SEM and EDAX and BET and indicated that ZnCl2had adhered to the surface of GAC after modified. Zeta potential, Raman spectra, and FTIR suggested the electrostatic attraction between the nitrate ions and positive charge. The results revealed that the mechanism of adsorption nitrate mainly depended on electrostatic attraction almost without any chemical interactions.

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