Porous magnetic carbon sheets from biomass as an adsorbent for the fast removal of organic pollutants from aqueous solution

Zhang, Shouwei; Zeng, Meiyi; Li, Jiaxing; Li, Jie; Xu, Jinzhang; Wang, Xiangke

doi:10.1039/c3ta14604a

Cited by 284 publications

(148 citation statements)

References 37 publications

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“…The maximum adsorption capacities of MB onto Fe 3 O 4 /mSiO 2 -C 18 sorbent obtained from Langmuir equation at 25°C, 35°C and 45°C are 363.64 mg g À1 , 287.35 mg g À1 and 213.68 mg g À1 , respectively, with the adsorption equilibrium constants of 0.256 L mg À1 , 0.131 L mg À1 , and 0.127 L mg À1 . These values are superior to or comparable with those in most of the related works reported previously [10,22,30,[42][43][44][45][46] except for the porous magnetic carbon sheet [47] (Table S1). The Freundlich adsorption intensity parameters are higher than 1.5, also demonstrating the strong adsorption trend of MB onto the sorbent.…”

Section: Adsorption Isotherm Analysis and Thermodynamic Parameterssupporting

confidence: 63%

One-pot synthesis of C18-functionalized core–shell magnetic mesoporous silica composite as efficient sorbent for organic dye

Zhang

Zeng

Wang

et al. 2015

Journal of Colloid and Interface Science

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a b s t r a c tIn this work, a facile one-pot strategy was proposed for the synthesis of C 18 -functionalized core-shell magnetic mesoporous silica composite (Fe 3 O 4 /mSiO 2 -C 18 ). The Fe 3 O 4 /mSiO 2 -C 18 composite, with an average size of 80 nm and a functionalized mesoporous silica shell of about 30 nm in thickness, has excellent adsorption ability toward methylene blue dye (MB) due to the large surface area (303 m 2 g À1 ) and the abundant hydrophobic C 18 groups. The adsorption equilibrium was achieved within 20 min and the adsorption behavior of MB on Fe 3 O 4 /mSiO 2 -C 18 composite fitted the pseudo-second-order kinetic model well (k 2 = 1.29 Â 10 À2 g mg À1 min À1 , q e = 144.72 mg g À1 , h o = 270.27 mg g À1 min À1 under 25°C and an initial MB concentration of 10 mg L À1 ). Langmuir and Freundlich isothermal adsorption models can both be used to describe the adsorption process and the maximum Langmuir adsorption capacity of MB on Fe 3 O 4 /mSiO 2 -C 18 at 25°C and pH 7.5 is 363.64 mg g À1 . Thermodynamic parameters show that the adsorption reaction is exothermic and spontaneous (DH 0 = À63.49 kJ mol À1 , DG 0 = À7.80 kJ mol À1 ). Ionic strength and pH affected the adsorption slightly. In addition, the MB adsorbed sorbent can be readily separated from water solution by an external magnet because of the high magnetic saturation value (22.62 emu g À1 ). After being regenerated by treatment with acidic methanol, the sorbent could be reused for at least 5 cycles with a little decrease in adsorption capacity.

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Section: Adsorption Isotherm Analysis and Thermodynamic Parameterssupporting

confidence: 63%

One-pot synthesis of C18-functionalized core–shell magnetic mesoporous silica composite as efficient sorbent for organic dye

Zhang

Zeng

Wang

et al. 2015

Journal of Colloid and Interface Science

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“…They include carbon nanotubes (singlewalled, SWCNTs or multi-walled, MWCNTs), carbon nanofibers, fullerene, graphene and derivatives, and amorphous carbonaceous composites [25][26][27][28]. C-ENMs characteristically have exceptionally high surface area, which make them ideal candidates for adsorption of pollutants [27,[29][30][31]. In addition, the surfaces of these inherently hydrophobic materials can be functionalized to target specific pollutants via chemical or electrical interactions [32].…”

Section: Carbonaceous Nanomaterialsmentioning

confidence: 99%

“…2 As an example, using SWCNTs to remove lead (Pb) in water via adsorption could cost an average of $2.2/g-Pb, 3 assuming an average adsorption capacity of 75 mg-Pb/g-CNT and considering only the cost of the SWNCTs. The cost may be reduced by several factors since many C-ENMs may be recoverable and reusable several times [30,410,480]. CNTs are relatively more expensive than most other engineered nanomaterials; hence, C-ENM remediation/treatment may be rather expensive.…”

Section: Broad Overview Of Performance and Costmentioning

confidence: 99%

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Adeleye

Conway

Garner

et al. 2016

Chemical Engineering Journal

690

229

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“…Moreover, adsorptive materials incorporating magnetic nanoparticles were able to control the binding process and simplified the separation and purification processes. Adsorption was achieved by dispersing nanoparticles in solution and separating them from matrix with an external magnetic field [16][17][18]. In comparison with conventional separation techniques, such as filtration, centrifugation and precipitation, magnetic separation technology is a promising technique with its easy operation and fast separation.…”

Section: Introductionmentioning

confidence: 99%

Methylene Blue Adsorption by Novel Magnetic Chitosan Nanoadsorbent

Zhu

Zhang

Yan

2016

J. of Wat. & Envir. Tech.

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A novel magnetic nanoadsorbent (magnetic chitosan modified by N,N-bis (carboxymethyl) glutamic acid, G-MCTS for short) was prepared by covalent binding of tetrasodium of N,N-bis (carboxymethyl) glutamic acid onto the surface of chitosan-coated Fe 3 O 4 nanoparticles. The adsorbent was characterized by scanning electron microscopy, infrared spectrum, vibrating sample magnetometer and X-ray powder diffractometer. It was found that G-MCTS had a spherical structure with a particle size ranging from 100 − 150 nm and a saturation magnetization value of 21 emu/g. Meanwhile, the adsorption performances of G-MCTS were tested with adsorption of methylene blue. Correspondingly, the adsorption effect factors (initial concentration, solution pH, contact time and temperature), adsorption kinetics, isotherms and adsorption thermodynamics were investigated in detail. Results showed that the adsorption could reach equilibrium within 30 min, besides, the adsorption kinetics accepted the pseudo-second-order kinetic model, and the adsorption isotherm data fit with Freundlich model as well as Langmuir model. More importantly, the maximum adsorption capacity was 3.3 g/g obtained by Langmuir model and the adsorption capacity was more than 90% of the initial saturation adsorption capacity after being used for four times. All of these results indicated that, G-MCTS can serve as an effective adsorbent for the adsorption of methylene blue.

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Porous magnetic carbon sheets from biomass as an adsorbent for the fast removal of organic pollutants from aqueous solution

Abstract: Carbon-stabilized Fe/Fe3C nanoparticles with excellent adsorption capacity for dyes were fabricated through a facile in situ synthetic strategy.

Cited by 284 publications

References 37 publications

One-pot synthesis of C18-functionalized core–shell magnetic mesoporous silica composite as efficient sorbent for organic dye

One-pot synthesis of C18-functionalized core–shell magnetic mesoporous silica composite as efficient sorbent for organic dye

Engineered nanomaterials for water treatment and remediation: Costs, benefits, and applicability

Methylene Blue Adsorption by Novel Magnetic Chitosan Nanoadsorbent

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