Kinetic and equilibrium studies of cobalt adsorption on apricot stone activated carbon

Abbas, Moussa; Kaddour, Samia; Trari, M.

doi:10.1016/j.jiec.2013.06.030

Cited by 225 publications

(79 citation statements)

References 32 publications

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“…The weak intensity of this peak indicates that this sample contains a small amount of carboxyl groups [53]. The band at 1599 cm -1 indicates the presence of (C-H, -C=C-and aromatic C=C) groups [54]. Moreover, the band at 1440 cm -1 may correspond to the O-H bending band.…”

Section: Adsorption Of Methyl Orange By the Synthesized Activated Carbonmentioning

confidence: 95%

Adsorption capability of activated carbon synthesized from coconut shell

Islam¹,

Ang²,

Gharehkhani³

et al. 2016

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Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m 2 /g with a pore volume of 1.032 cm 3 /g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The field emission scanning electron microscopy image showed the presence of well-developed pores on the surface of the activated carbon. The presence of important functional groups was shown by the Fourier transform infrared spectroscopy spectrum. The adsorption of methyl orange onto the activated carbon reached 100% after 12 min. Kinetic analysis indicated that the adsorption of methyl orange solution by the activated carbon followed a pseudo-second-order kinetic mechanism (R 2 > 0.995). Therefore, the results show that the produced activated carbon can be used as a proper adsorbent for dye containing effluents.

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Section: Adsorption Of Methyl Orange By the Synthesized Activated Carbonmentioning

confidence: 95%

Adsorption capability of activated carbon synthesized from coconut shell

Islam¹,

Ang²,

Gharehkhani³

et al. 2016

Carbon letters

View full text Add to dashboard Cite

show abstract

“…At high P/Po values, the isotherm show a small capillary condensation step and presents a hysteresis loop that is of H4 type. The hysteresis loop, observed for P/Po > 0.5 can be due to capillary condensation in narrow slit-shaped mesopores [27] concluding the presence of both micro-porosity and a small part of meso-porosity [28]. The volume of N 2 adsorbed at high relative pressure although not significant, is attributed to the presence of substantial presence of mesopores [29,30].…”

Section: Materials Characterizationmentioning

confidence: 99%

Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

et al. 2017

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Abstract:The presence of arsenic in water supplies is a major problem for public health and still concerns large parts of population in Southeast Asia, Latin America and Europe. Removal of arsenic is usually accomplished either by coagulation with iron salts or by adsorption with iron oxides or activated alumina. However, these materials, although very efficient for arsenic, normally do not remove other undesirable constituents from waters, such as chlorine and organo-chlorine compounds, which are the results of water chlorination. Activated carbon has this affinity for organic compounds, but does not remove arsenic efficiently. Therefore, in the present study, iron modified activated carbons are investigated as alternative sorbents for the removal of arsenic(V) from aqueous solutions. In addition, modified activated carbons with magnetic properties can easily be separated from the solutions. In the present study, a simple and efficient method was used for the preparation of magnetic Fe 3 (Mn 2+ )O 4 (M:Fe and/or Mn) activated carbons. Activated carbons were impregnated with magnetic precursor solutions and then calcinated at 400 • C. The obtained carbons were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherms, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), Fourier Transform Infrared Spectrometry (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements. Their adsorption performance for As(V) was evaluated. The iron impregnation presented an increase in As(V) maximum adsorption capacity (Q max ) from about 4 mg g −1 for the raw carbon to 11.05 mg g −1 , while Mn incorporation further increased the adsorption capacity at 19.35 mg g −1 .

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“…4,6 Therefore, we should urgently nd an effective method to remove heavy metal contaminants from aquatic systems and keep the pollutant amount at the minimum standard appropriate for living organisms. To this end, numerous techniques (e.g.…”

Section: Introductionmentioning

confidence: 99%

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

2018

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Porous carboxymethyl chitosan (PCMC) beads were synthesized via ionic coacervation/chemical crosslinking, using polyethylene glycol (PEG) as a porogen and calcium chloride and glutaraldehyde as physical and chemical cross-linkers. The as-synthesized PCMC beads were characterized using SEM, EDS, BET, TGA, FTIR and XPS analysis and then tested for the removal of Co(II) from aqueous solution. The effects of the initial pH, Co(II) concentration and temperature were investigated. It was found that the adsorption equilibrium is reached within 6 h and the maximum adsorption capacity is 46.25 mg g À1 .In addition, the kinetics and equilibrium data are well described by pseudo-second-order kinetics and the Langmuir isotherm model. Moreover, the desorption and re-adsorption performance was also studied, and the results revealed that the prepared new adsorbent still showed good adsorption performance after five cycles of regeneration. Finally, the adsorption mechanism, including chemical and physical adsorption, was proposed on the basis of the microstructure analysis, adsorption kinetics and isotherm results, and chemical adsorption was found to be the main adsorption mechanism during the process of the removal of Co(II).

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Kinetic and equilibrium studies of cobalt adsorption on apricot stone activated carbon

Cited by 225 publications

References 32 publications

Adsorption capability of activated carbon synthesized from coconut shell

Adsorption capability of activated carbon synthesized from coconut shell

Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

Fast removal of Co(ii) from aqueous solution using porous carboxymethyl chitosan beads and its adsorption mechanism

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