Characterization of heterogeneity of activated carbons by utilizing the benzene adsorption data

Activated carbons were prepared from Lapsi seed stone by the treatment with H2SO4 and HNO3 for the removal of Ni (II) ions from aqueous solution. Two activated carbon have been prepared from Lapsi seed stones by treating with conc.H2SO4 and a mixture of H2SO4 and HNO3 in the ratio of 1:1 by weight for removal of Ni(II) ions. Chemical characterization of the resultant activated carbons was studied by Fourier Transform Infrared Spectroscopy and Boehm titration which revealed the presence of oxygen containing surface functional groups like carboxyl, lactones and phenols in the carbons. The optimum pH for nickel adsorption is found to be 5. The adsorption data were better fitted with the Langmuir equations than Freundlich adsorption equation to describe the equilibrium isotherms. The maximum adsorption capacity of Ni (II) on the resultant activated carbons was 28.25.8 mg g-1 with H2SO4 and 69.49 mg g-1 with a mixture of H2SO4 and HNO3. The waste material used in the preparation of the activated carbons is inexpensive and readily available. Hence the carbons prepared from Lapsi seed stones can act as potential low cost adsorbents for the removal of Ni (II) from water. DOI: http://dx.doi.org/10.3126/jie.v9i1.10680Journal of the Institute of Engineering, Vol. 9, No. 1, pp. 166–174

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Effects of Gasifying Agents on the Characterization of Nut Shell-derived Activated Carbon

Adsorption Science & Technology ◽

10.1177/026361749501200309 ◽

1995 ◽

Vol 12 (3) ◽

pp. 247-258 ◽

Cited By ~ 14

Author(s):

C. Nguyen ◽

A. Ahmadpour ◽

D.D. Do

Keyword(s):

Carbon Dioxide ◽

Activated Carbon ◽

Activated Carbons ◽

Benzene Adsorption ◽

Surface Areas ◽

Activating Agent ◽

Micropore Size ◽

Adsorptive Properties ◽

Insight Into

Activated carbon was prepared from nut shells using a conventional two-stage method: carbonization followed by activation. Activation with steam or carbon dioxide as activating agent produced a range of chars of different burn-off. These were characterized for their total and micropore surface areas, and benzene adsorption capacity. Benzene adsorption measurement provided an insight into the effect of porosity development on the adsorptive properties of the adsorbent. It was found that activated carbon products from nut shells were comparable, in terms of adsorption characteristics, with activated carbons from other lignocellulosic precursors. The evolution of porosity of the resulting carbons shows that carbon dioxide is the preferable agent for the production of activated carbon with a narrow micropore size distribution.

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Adsorption of Organic Compounds from Aqueous Solutions on Activated Carbons

Water Science & Technology ◽

10.2166/wst.1991.0210 ◽

1991 ◽

Vol 24 (7) ◽

pp. 269-276 ◽

Cited By ~ 3

Author(s):

J. Choma ◽

M. Jaroniec

Keyword(s):

Aqueous Solutions ◽

Organic Compounds ◽

Activated Carbons ◽

Structural Heterogeneity ◽

Quantitative Characterization ◽

Isotherm Equation ◽

Gamma Distribution Function ◽

Adsorption Data ◽

Dilute Aqueous Solutions

A three-parameter isotherm equation is applisd for describing adsorption of organic compounds From dilute aqueous solutions on microporous activated carbons. This isotherm equation corresponds to the gamma distribution function that characterizes structural heterogeneity of the micropores. Parameters of this isotherm equation permit a quantitative characterization of the structural and energetic heterogeneities of activated carbons. Adsorption isotherms of phenol and benzoic acid from dilute aqueous solutions on the Filtrasarb-400 activatsd carbon are used to illustrate the method of characterization of carbonaceous adsorbents on the basis of the liquid-solid adsorption data.

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Characterization of activated carbons by ktilizink the nitroken adsorption data

Materials Chemistry and Physics ◽

10.1016/0254-0584(88)90109-5 ◽

1988 ◽

Vol 20 (2) ◽

pp. 179-189 ◽

Cited By ~ 3

Author(s):

J. Choma ◽

M. Jaroniec

Keyword(s):

Activated Carbons ◽

Adsorption Data

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Production and characterization of activated carbons from neem bark (Azadirachta indica)

International Journal of Environmental Science and Technology ◽

10.1007/s13762-021-03405-z ◽

2021 ◽

Author(s):

C. E. Ouedraogo ◽

K. N. Aboua ◽

D. B. Soro ◽

M. Diarra ◽

L. Meité ◽

...

Keyword(s):

Azadirachta Indica ◽

Activated Carbons

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Preparation and Characterization of Carbon Supported Nano-Nickel and its Sorption Behavior for Zinc from Aqueous Solutions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.510-511.271 ◽

2012 ◽

Vol 510-511 ◽

pp. 271-276 ◽

Cited By ~ 1

Author(s):

Tayyaba Asim ◽

R. Ahmed ◽

M.S. Ansari

Keyword(s):

Morphological Study ◽

Aqueous System ◽

Effect Of Temperature ◽

Vacuum Drying ◽

Sorption Behavior ◽

Nickel Deposition ◽

Adsorption Data ◽

Nano Nickel ◽

The Mean

Nickel deposited on carbon has been used as adsorbent to recover Zn (II) from aqueous system. The adsorbent was synthesized by depositing nickel nitrate on carbon under inert conditions and decomposing it to nickel by raising the temperature, washing and vacuum drying. Various techniques including XRD, FTIR, and SEM were employed for its characterization. FTIR showed that the nickel deposition enhanced the carbon functionalization due to presence of OH, C=O and C-O groups.Average crystallite size ofabout 9 nm was determined from XRD. Nickel deposition resulted in further division particles as indicated from the morphological study. Zn (II) was subjected to adsorptionon the synthesized adsorbent. It was observed that the rate of adsorption increased significantly on the nickel deposited carbon than the carbon alone. Morris-Weber, Lagergren and Reichenberg models were applied to find out the type and rate of adsorption employingfirst and second order rate equations.The adsorption data were applied toLangmuir, Freundlich and D-R isotherms and values of isotherm constants were calculated and were higher for Ni/C than carbon alone. The mean free energy of zinc sorption on carbon and Ni/C are 16.67 and 18.26 kJmol-1 which shows chemisorption. Thermodynamic studies were done to find out the effect of temperature on sorption. Positive values of ΔH and negative values of ΔG show endothermic and spontaneous type of sorption.

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Comparative studies on the removal of copper (II) by Ulva fasciata activated carbon and commercially activated carbon

Polish Journal of Chemical Technology ◽

10.2478/v10026-012-0108-z ◽

2012 ◽

Vol 14 (4) ◽

pp. 88-94 ◽

Cited By ~ 2

Author(s):

R.P. Suresh Jeyakumar ◽

V. Chandrasekaran

Keyword(s):

Activated Carbon ◽

Activated Carbons ◽

Synthetic Wastewater ◽

Batch Adsorption ◽

First Order ◽

Ulva Fasciata ◽

Adsorption Data ◽

Pseudo Second Order ◽

Pseudo First Order ◽

Adsorbent Dose

Abstract In this work, the efficiency of Ulva fasciata sp. activated carbons (CCUC, SCUC and SSUC) and commercially activated carbon (CAC) were studied for the removal of Cu (II) ions from synthetic wastewater. Batch adsorption experiments were carried out as a function of pH, contact time, initial copper concentration and adsorbent dose. The percentage adsorption of copper by CCUC, SSUC, SCUC and CAC are 88.47%, 97.53%, 95.78% and 77.42% respectively. Adsorption data were fitted with the Langmuir, Freundlich and Temkin models. Two kinetic models pseudo first order and the pseudo second order were selected to interpret the adsorption data.

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