Ultrasonic-assisted sodium hypochlorite oxidation of activated carbons for enhanced removal of Co(II) from aqueous solutions

Liu, Wei Feng; Zhang, Jian; Cheng, Cheng; Tian, Gui-Peng; Zhang, Chenglu

doi:10.1016/j.cej.2011.09.004

Cited by 58 publications

(17 citation statements)

References 25 publications

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“…Based on the data in Table 1, the equilibrium data agreed well with the Freundlich isotherm equation. This result indicated the occurrence of multilayer adsorption [30]. The relevant parameter of the Freundlich constant 1/n was less than 1, indicating a favorable adsorption process [30].…”

Section: Adsorption Isothermsmentioning

confidence: 90%

Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge

Kong

Wang

Shu

et al. 2016

Desalination and Water Treatment

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A B S T R A C TActivated carbon (AC) developed from loofah sponge with phosphoric acid activation was applied to absorb cefalexin (CEX) in aqueous solution. AC was characterized by N 2 adsorption-desorption isotherms and Fourier transform infrared spectroscopy (FTIR). Factors influencing the adsorption process were investigated. The equilibrium adsorption isotherms and kinetics of CEX were also studied. The results showed that AC prepared from loofah sponge had rough surface and abundant pores. The determination results of specific surface area (810.12 m 2 /g) and average pore size (5.28 nm) suggested the high adsorption capability. At low concentration, the AC could adsorb about 95% of CEX. The adsorption effect was independent of the temperature and pH. The maximum adsorption amount of CEX was about 55.11 mg/g at 308 K. The equilibrium data agreed well with Freundlich isotherm equation (R 2 = 0.9957) at 308 K, which indicated multilayer adsorption. FTIR analysis suggested the existence of phosphorus-containing functional groups, C-O bond, and C=C bond on the surface of AC of which the peak intensity of AC after adsorption was slightly lower after adsorption, indicating that the AC surface groups interacted with or were covered by the CEX species.

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Section: Adsorption Isothermsmentioning

confidence: 90%

Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge

Kong

Wang

Shu

et al. 2016

Desalination and Water Treatment

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“…28.16 [54] poly(MVE-alt-MA-1) 29.97 Present study Ni 2+ cellulose acetate/zeolite composite fiber 16.95 [55] NaA/xanthan gum-alginate composite 45.87 [56] poly(styrene-co-maleic anhydride) microspheres 47.9 [57] poly(MVE-alt-MA-1) 67. 45 Present study Co 2+ activated carbons 65.79 [58] magnetic multiwalled carbon nanotube/iron oxide composites 8.84 [59] ammonium molybdophosphate-polyacrylonitrile 9.43 [60] poly(MVE-alt-MA-1) 71.29 Present study …”

Section: Comparison Of the Maximum Sorption Capacities With Other Adsmentioning

confidence: 97%

Preparation of porous resin with Schiff base chelating groups for removal of heavy metal ions from aqueous solutions

Cegłowski

Schroeder

2015

Chemical Engineering Journal

128

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“…Peaks around 1120 cm ¡1 and 970 cm ¡1 can be attributed to C-O bonds, such as those found in phenol, ester, and ether groups (20). The peak at 1560 cm ¡1 is related to aromatic ring stretching or presence of a highly conjugated CHO group.…”

Section: Resultsmentioning

confidence: 99%

“…Yang et al (19) applied adequate dosage of NaOCl to oxidize CNTs in adsorption performance. In addition, NaOCl oxidation of activated carbons for enhanced removal of Co (II) from aqueous solutions was reported by Liu et al (20). The ability of NaOCl to oxidize various functional groups is well established in organic chemistry.…”

Section: Introductionmentioning

confidence: 95%

Chemical Oxidation of Multi-Walled Carbon Nanotube by Sodium Hypochlorite for Production of Graphene Oxide Nanosheets

Abdolkarimi-Mahabadi

Manteghian

2015

Fullerenes, Nanotubes and Carbon Nanostructures

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Carbon nanotubes (CNTs) were chemically oxidized to produce graphene oxide (GO) nanosheets via a simple method. Pristine CNTs were treated with sulfuric acid and acid-treated CNTs were oxidized with sodium hypochlorite (NaOCl) to obtain peeled CNTs and consequently GO nanosheets. Transmission electron microscopy and atomic force microscopy were used to determine the morphology of synthesized GO nanosheets and peeled CNTs, respectively. UV-vis spectroscopy, Raman spectroscopy, Fourier transform infrared, and thermal gravimetric analysis were used to characterize the product structure. The UV-vis spectroscopy revealed peak absorption at 245 nm, which is similar to what is seen on CNT unzipping in producing GO nano-ribbons.

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Ultrasonic-assisted sodium hypochlorite oxidation of activated carbons for enhanced removal of Co(II) from aqueous solutions

Cited by 58 publications

References 25 publications

Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge

Isotherm, kinetic, and thermodynamic equations for cefalexin removal from liquids using activated carbon synthesized from loofah sponge

Preparation of porous resin with Schiff base chelating groups for removal of heavy metal ions from aqueous solutions

Chemical Oxidation of Multi-Walled Carbon Nanotube by Sodium Hypochlorite for Production of Graphene Oxide Nanosheets

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