Adsorption behavior of methylene blue on carbon nanotubes

Yao, Yunjin; Xu, Fang; Chen, Ming; Xu, Zhongxiao; Zhu, Zhiwen

doi:10.1016/j.biortech.2009.12.042

Cited by 686 publications

(301 citation statements)

References 33 publications

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“…As the table shows, the MB adsorption capacity of CGO fibre is higher than carbon nanotube, [12] graphene, [13] magnetic CGO, [24] magnetic chitosan/graphene oxide, [33] and graphene oxide/calcium alginate. [23] Furthermore, the Langmuir isotherm model can be described by a separation factor, which is defined by the following equation [34]: where k L is the Langmuir constant (L/mg) and C 0 is the initial dye concentration (mg/L).…”

Section: Adsorption Isothermmentioning

confidence: 97%

“…With the rapid development in nanotechnology, carbon nanomaterials have been investigated in water treatment, such as the carbon nanotubes [12] and graphene. [13] Graphene, an ideal two-dimensional sheet of hexagonally arrayed sp 2 -bonded carbon atoms, has drawn tense attentions due to its unique electronic, thermal, and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Removal of methylene blue from water by cellulose/graphene oxide fibres

Chen

et al. 2016

Journal of Experimental Nanoscience

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A novel and efficient cellulose/graphene oxide (CGO) fibre adsorbent was prepared by wet-spinning technique. The morphology and physicochemical properties of the CGO fibres were characterised by scanning electron microscope (SEM), Fourier transform infrared spectrometer, and thermo-gravimetric analysis. The equilibrium adsorption data were well fitted to the Langmuir models, and the adsorption capacity calculated from the Langmuir model reached 480.77 mg/g at 318 K. The adsorption kinetic studies revealed that pseudo-second-order model best describes the adsorption kinetic data. The thermodynamic parameters indicated that the adsorption was an endothermic and spontaneous process. Furthermore, the CGO fibre, which is very stable and easily separable, can be recycled with a dilute NaOH solution wash, retaining over 93% of the adsorption capacity after recycling three times.

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Section: Adsorption Isothermmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Removal of methylene blue from water by cellulose/graphene oxide fibres

Chen

et al. 2016

Journal of Experimental Nanoscience

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“…They investigated adsorption kinetics, adsorption capacity of the adsorbent, and the effects of adsorption dosage and solution pH values on removal efficiency of those cationic dyes [18]. Yao et al also investigated the effect of temperature on the equilibrium adsorption of methylene blue and methyl orange from aqueous solution using carbon nanotubes [19][20][21]. Ghaedi et al reported the removal of Alizarin red S and morin from wastewater using a multiwalled carbon nanotube [22].…”

Section: Introductionmentioning

confidence: 99%

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Wang

et al. 2012

Chemical Engineering Journal

197

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h i g h l i g h t s" Adsorption of methylene blue and acid red 183 on a MWCNT in single and binary dye systems was investigated. " MWCNT shows higher adsorption capacity to methylene blue in both systems. " A synergistic effect for basic and acid dyes occurs in a binary dye system. t r a c tA multiwalled carbon nanotube (MWCNT) was used as an adsorbent for removal of a cationic dye (methylene blue, MB) and acid dye (acid red 183, AR183) from aqueous solution in single and binary dye systems. Characterization of the MWCNT and MWCNT-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TG-DTA), zeta potential and elemental analysis. Adsorption tests showed that the MWCNT presented higher adsorption of MB than AR183 in single and binary dye systems, revealing that p-p stacking is the main driving force responsible for the dye-MWCNT interaction. In single dye systems, the MWCNT presented the maximum adsorption capacities of MB and AR183 at 59.7 and 45.2 mg/g, respectively. In a binary dye system, a synergistic effect due to electronic attraction between MB and AR183 was found at low AR183 concentration (10 mg/L), which promotes the adsorption of both dyes on the MWCNT. However, MB adsorption could be reduced at higher AR183 concentration (>20 mg/L) due to a strong electrostatic attraction between MWCNT-AR183.

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“…In fact, Freundlich equation was explained the equilibrium adsorption, which is must commonly written as [26][27][28][29]:…”

Section: Isotherm Adsorptionmentioning

confidence: 99%

“…From the slope and the intercept of the plots of t versus t/q, the k 2 and q e values of the pseudo-second-order kinetic model can be obtained, respectively (Fig. 7) [28]. The adsorption capacity of fenvalerate onto CMNTs at a certain time (q t , mg g -1 ) and the adsorption capacity of Table 2 The effect of temperature and thermodynamic parameters of the fenvalrate adsorption on the CMNTs at different temperatures fenvalerate onto CMNTs at equilibrium (q e , mg g -1 ) can be calculated by the following equations:…”

Section: Kinetic Modeling and Thermodynamic Of Adsorptionmentioning

confidence: 99%

Carboxylated carbon nanotubes as an efficient and cost-effective adsorbent for sustainable removal of insecticide fenvalerate from contaminated solutions

2016

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In this study, carboxylic multiwall carbon nanotubes (CMNTs) were used as an adsorbent for removing fenvalerate as a toxic insecticide from solution through batch experiments. The influence of four independent parameters of HCl, initial fenvalerate concentration, CMNTs dosage, and contact time on the fenvalerate adsorption process was investigated. Raman spectroscopy and thermogravimetric analysis confirmed that the adsorption and maximum adsorption capacity (40.0 mg g -1 ) showed high adsorption potential of the proposed sorbent. The kinetic, isothermic, and thermodynamic of fenvalerate adsorptionon CMNTs were evaluated to better understand this environmental friendly adsorption strategy. A pseudo-first-order kinetic described very well the experimental data of the adsorption kinetics. The experimental data found to be properly fitted to Freundlich model, which indicates that the sorption takes place on a heterogeneous material. The thermodynamic results showed the negative value of the standard free energy (DG 0 ) and standard enthalpy change (DH 0 ) showing an exothermic and spontaneous system. Repeated availability of adsorbent investigated and SEM and HRTEM of reused adsorbent showed stability and non-aggregatable attributes of CMNTs.

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Adsorption behavior of methylene blue on carbon nanotubes

Cited by 686 publications

References 33 publications

Removal of methylene blue from water by cellulose/graphene oxide fibres

Removal of methylene blue from water by cellulose/graphene oxide fibres

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Carboxylated carbon nanotubes as an efficient and cost-effective adsorbent for sustainable removal of insecticide fenvalerate from contaminated solutions

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