Removal, recovery and enrichment of metals from aqueous solutions using carbon nanotubes

Yu, Jingang; Zhao, Xing; Yu, Lin-Yan; Jiao, Feipeng; Jiang, Jianhui; Chen, Xiaoqing

doi:10.1007/s10967-013-2818-y

Cited by 76 publications

(38 citation statements)

References 114 publications

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“…This can be verifi ed by the comparison of the adsorption capacity of the pure hydrogels (MCNT = 0 wt.%) and the nanocomposites containing MCNTs. In fact, MCNTs are already reported as good adsorbents for various materials due to its large specifi c surface area, and hollow and layered nano-sized structures 23,24,36,37 . Therefore, the adsorption capacity of the hydrogel nanocomposite was shown to be higher than that of the puer hydrogels without any MCNTs.…”

Section: Effect Of Mcnt Concentration On the Adsorptionmentioning

confidence: 99%

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

Hosseinzadeh

2015

Polish Journal of Chemical Technology

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A novel polysaccharide-based hydrogel nanocomposite was prepared using grafting of acrylic acid (AA) on to kappa-carrageenan (κC) by incorporating multi-walled carbon nanotube (MCNT). In fact, MCNTs were used as nano-sized reinforcements in the synthesized nanocomposite. Spectroscopy together with morphology proved relatively strong κC-MCNT interaction. Besides, the swelling behavior of the nanocomposite hydrogel was studied. The results showed that in the presence of MCNTs, the equilibrium swelling capacity was decreased. This can be attributed to cross-linking role and hydrophilicity nature of MCNTs. The adsorption performance of hydrogel nanocomposite was also investigated for the removal of crystal violet (CV) as a cationic dye. The effects of some important parameters such as MCNT concentration, pH and contact time on the uptake of CV solution were studied. Equilibrium adsorption isotherm data of the hydrogel exhibited better fi t to the Langmuir than to the Freundlich isotherm model. According to this model, the maximum adsorption capacity of κC-based hydrogel nanocomposite was found to be 118 mg . g -1.

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Section: Effect Of Mcnt Concentration On the Adsorptionmentioning

confidence: 99%

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

Hosseinzadeh

2015

Polish Journal of Chemical Technology

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“…Most industries produce and discharge metal-containing wastes mostly into water bodies, which affect the aesthetic quality of the water and also increase the concentrations of metals present [3,4]. Activities such as mining and smelting operations, wastewater treatment facilities, various agricultural works and metal castings contribute significantly to the concentration of heavy metals in the environment [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

et al. 2015

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Lead(II) ion is a very toxic element known to cause detrimental effects to human health even at very low concentrations. An adsorbent prepared using mucilaginous leaves from Diceriocaryum eriocarpum plant (DEP) was used for the adsorption of lead(II) ion from aqueous solution. Batch experiments were performed on simulated aqueous solutions under optimized conditions of adsorbent dosage, contact time, pH and initial lead(II) ion concentration at 298 K. The Langmuir isotherm model more suitably described the adsorption process than the Freundlich model with linearized coefficients of 0.9661 and 0.9547, respectively. Pseudo-second order kinetic equation best described the kinetics of the reaction. Fourier transform infra-red analysis confirmed the presence of amino (-NH), carbonyl (-C=O) and hydroxyl (-OH) functional groups. Application of the prepared adsorbent to wastewater samples of 10 mg/L and 12 mg/L of lead(II) ion concentration taken from a waste stabilization pond showed removal efficiencies of 95.8% and 96.4%, respectively. Futhermore, 0.1 M HCl was a better desorbing agent than 0.1 M NaOH and de-ionized water. The experimental data obtained demonstrated that mucilaginous leaves from DEP can be used as a suitable adsorbent for lead(II) ion removal from wastewater.

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“…These electrondonating groups can be viewed as bases and metal ions belong to acids based on Lewis acid-base theory. Their interactions include electrostatic interaction, ion exchange, complex formation, and redox reaction [160,161]. Using this method not only improves the adsorption rate and capacity but also optimizes the dispersity of carbon nanomaterials in water due to the stronger hydrophilicity of grafted atoms in comparison with carbon atoms.…”

Section: Electron-donating Group Grafted Carbon Nanomaterialsmentioning

confidence: 99%

“…The interactions between adsorbents and adsorbates mainly include electrostatic interaction, ion exchange, complex formation, and redox reaction [160,161].…”

Section: Interactions Between Adsorbents and Adsorbatesmentioning

confidence: 99%

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

Guo

et al. 2017

Adv Compos Hybrid Mater

178

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Carbon nanoadsorbents have attracted tremendous interest for metal ion removal from wastewater due to their extraordinary aspect ratios, surface areas, porosities, and reactivities. However, challenges still exist as they suffer from subpar dispersion and recovery, tending to aggregate, and so on. Thus, significant research efforts focus on modification of these carbon nanomaterials to increase the dispersions and recoveries, while maintaining or even enhancing the desirable properties. This review aims to give an in-depth look at recent and impactful advances in metal ion adsorption applications involving these modified carbon nanostructures. Here, the advanced design and testing of modified carbon nanostructures for metal ion removal are emphasized with comprehensive examples, and various adsorption behaviors and mechanisms are discussed, which are hoped to help the development of more effective adsorbents for water treatment.

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Removal, recovery and enrichment of metals from aqueous solutions using carbon nanotubes

Cited by 76 publications

References 114 publications

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

A Novel Approach for the Removal of Lead(II) Ion from Wastewater Using Mucilaginous Leaves of Diceriocaryum eriocarpum Plant

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

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