Catalytic Reduction of Hexaminecobalt(III) by Pitch‐based Spherical Activated Carbon (PBSAC)

Chen, Yu; Mao, Yan-Peng; Zhu, Hai-Song; Cheng, Jing-yi; Long, Xiang‐li; Wang, Yuan

doi:10.1002/clen.200900256

Cited by 6 publications

(1 citation statement)

References 16 publications

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“…The adsorption process has proven as the best water treatment technology because of high efficiency, rapid phase separation, and low consumption of organic solvents. Many substances have been applied as solid-phase extractors including activated carbon, silica gel, ion-exchange resins, polymers, and other adsorbents [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Mahmoud

Yakout

Elserw

et al. 2016

CLEAN Soil Air Water

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Nanosilica (NSi) was functionalized by oxalic acid (NSi-Ox) and tartaric acid (NSi-Tar) using solvent-free microwave-assisted approach. The two surface-modified NSi sorbents were characterized by Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, and thermal gravimetric analysis. NSi-Ox and NSi-Tar sorbents were examined for the removal of Co(II) from aqueous solutions by the batch adsorption technique. Removal of Co(II) was carried out at different controlling parameters such as pH, contact time, sorbent mass, and interfering ions. The maximum Co(II) uptake values were identified as 733.3 and 1026.7 mmol g À1 for NSi-Ox and NSi-Tar, respectively, and these were higher than the identified value by NSi sorbent (440 mmol g À1 ). This trend is mainly due to the surface functionalization with several active groups. The adsorption isotherms were evaluated using Langmuir and Freundlich models and the results were better fitted to the Langmuir model (R 2 ¼ 0.983 and 0.989 for NSi-Ox and NSi-Tar, respectively). Kinetic studies were performed and the experimental data were found in good agreement with the pseudosecond-order model. The thermodynamic parameters were also determined. The potential applications of NSi sorbents for removal of Co(II) from drinking tap water and sea water samples were successfully achieved using microcolumn studies.

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Section: Introductionmentioning

confidence: 99%

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Mahmoud

Yakout

Elserw

et al. 2016

CLEAN Soil Air Water

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Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon

Mao

Chen

Cheng

et al. 2011

CLEAN Soil Air Water

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A novel method has been put forward to retrofit the wet ammonia desulfurization process to realize the combined removal of sulfur dioxide and nitric oxide by introducing soluble cobalt(II) salt into aqueous ammonia solution. The active constituent of scrubbing NO from the flue gases is the CoðNH 3 Þ 2þ 6 produced by ammonia coordinating with Co 2þ . The regeneration of CoðNH 3 Þ 2þ 6can be realized under the catalysis of activated carbon so as to sustain a high NO removal efficiency for a long time. In this paper, the adsorption-reduction behavior of CoðNH 3 Þ 3þ 6 on activated carbon has been researched using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. A conclusion can be drawn from the results that cobalt ions in the aqueous solution are adsorbed by activated carbon and most of them are reduced to Co 2þ ions, and some of the Co 2þ ions are further reduced into metallic cobalt. The results also demonstrate that the functional groups on the surface of carbon take part in this redox reaction. The C-H groups on the carbon surface are oxidized into C-OH, and then some of the hydroxyl groups are further oxidized into carbonyl or carboxyl groups.

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Melamine modification of spherical activated carbon and its effects on acetylene hydrochlorination

Han

Wang

Zhang

et al. 2014

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Catalytic Reduction of Hexaminecobalt(III) by Pitch‐based Spherical Activated Carbon (PBSAC)

Cited by 6 publications

References 16 publications

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon

Melamine modification of spherical activated carbon and its effects on acetylene hydrochlorination

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Catalytic Reduction of Hexaminecobalt(III) by Pitch‐based Spherical Activated Carbon (PBSAC)

Cited by 6 publications

References 16 publications

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Adsorption Behavior of Solvent‐Free Microwave Assisted Nanosilica‐Functionalized Carboxylic Acids for the Removal of Cobalt (II) from Water

Adsorption–Reduction Behavior of Co(NH3) on Activated Carbon

Melamine modification of spherical activated carbon and its effects on acetylene hydrochlorination

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Product

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About

Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon