Pb(II) adsorption on magnetic γ-Fe2O3/titanate nanotubes composite

Chen, Huan; Li, Ting; Zhang, Lei; Wang, Rongrong; Jiang, Fang; Chen, Jian

doi:10.1016/j.jece.2015.07.010

Cited by 26 publications

(10 citation statements)

References 51 publications

(66 reference statements)

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“…The high surface area of STNTs and similar materials, e.g. between 240 and 302 m 2 • g −1 for TNTs [6][7][8][9] and 411 m 2 • g −1 for SNTs [10] could be attributed to its small inner diameters and multilayer morphology as observed by TEM in Figure 1(a). In contrast, the surface of the STNTs-Ch beads was 16 times lower as compared to the STNTs-Ch beads, which was probably due to the relatively low load of STNTs in the STNTs-Ch beads, which was 22% of the total mass.…”

Section: Resultsmentioning

confidence: 91%

“…In contrast, the surface of the STNTs-Ch beads was 16 times lower as compared to the STNTs-Ch beads, which was probably due to the relatively low load of STNTs in the STNTs-Ch beads, which was 22% of the total mass. A higher load of particles would increase the surface area of the composite as observed when the load of TNTs was increased to γ-Fe 2 O 3 /TNTs [9].…”

Section: Resultsmentioning

confidence: 99%

“…Among the NPs produced for heavy metals adsorption, the literature reports about the use of (i) titanium-based NPs (titanate nanotubes, TNTs) used for adsorbing e.g. Pb 2+ , Cd 2+ , Cu 2+ , Cr 3+ and Ni 2+ [5][6][7][8][9] and (ii) silicon-based NPs (silica nanotubes, SNTs) and a functionalized form (sym-diphenylcarbazide-SNTs) for adsorbing Pb 2+ , Cd 2+ and Co 2+ [10][11][12]. In order to meet an economically feasible process, the TNTs have previously been regenerated and reused [7,9].…”

Section: Introductionmentioning

confidence: 99%

“…Pb 2+ , Cd 2+ , Cu 2+ , Cr 3+ and Ni 2+ [5][6][7][8][9] and (ii) silicon-based NPs (silica nanotubes, SNTs) and a functionalized form (sym-diphenylcarbazide-SNTs) for adsorbing Pb 2+ , Cd 2+ and Co 2+ [10][11][12]. In order to meet an economically feasible process, the TNTs have previously been regenerated and reused [7,9]. However, bare NPs are not readily applied in water treatment as the treatment would require a necessary solid-liquid separation step [13,14] for avoiding the loss of NPs into the water [15].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of cadmium by a high-capacity adsorbent composed of silicate-titanate nanotubes embedded in hydrogel chitosan beads

Quiroga-Flores

Noshad

Wallenberg

et al. 2019

Environmental Technology

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In this study, we developed a nanoparticle-based mesoporous composite that consisted of silicatetitanate nanotubes (STNTs) supported in hydrogel chitosan beads (STNTs-Ch beads) and was studied for Cd 2+ adsorption. By using Fourier-transform infrared spectroscopy, transmission and scanning electron microscopy coupled to an energy-dispersive X-ray spectrometer, we could determine that the hollow STNTs were highly dispersed in the walls of the hollow beads. The dispersion was attributed to the effect of pH when the composite was prepared and we observed a non-interaction between STNTs and chitosan. The adsorption studies of Cd 2+ showed that the kinetic rate (k 2) increased 3-fold and that the diffusion rate (K d) increased 2-fold after the embedment. Moreover, the maximum capacity of adsorption of STNTs-Ch beads was 2.3 times higher than that of STNTs alone. The treatment of a synthetic Cd 2+ solution and a real leachate in continuous mode showed two phases in which it was observed higher removed fractions of transition metal ions (Cd 2+ , Co 2+ , Ni 2+ , Zn 2+ and Cu 2+) and the post-transition metal ion Pb 2+ , in comparison to the removed fractions of alkali and alkali-earth metal ions (Ca 2+ , K + , Mg 2+). The composite was successfully reused four times when adsorbing Cd 2+ , saving three times the needed amounts of TiO 2 , SiO 2 and chitosan for the production of the material. This composite was produced in a simple way and shows the potential for wastewater treatment.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of cadmium by a high-capacity adsorbent composed of silicate-titanate nanotubes embedded in hydrogel chitosan beads

Quiroga-Flores

Noshad

Wallenberg

et al. 2019

Environmental Technology

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“…Wang et al [26] used hydroxylated α-Fe 2 O 3 for synergistic photocatalysis of Cr(VI) reduction and 4-chlorophenol degradation under visible light irradiation. Other reports about Fe 2 O 3 magnetic composites for organic pollutant removal can be found in [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

One-pot synthesis of S-doped Fe2O3/C magnetic nanocomposite as an adsorbent for anionic dye removal: equilibrium and kinetic studies

Khoshsang

Ghaffarinejad

Kazemi³

et al. 2017

J Nanostruct Chem

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Novel S-doped Fe 2 O 3 /C nanocomposite was synthesized via a one-pot hydrothermal method and was used for the first time as an efficient adsorbent for Congo red dye (CR) removal from water solution. The obtained catalyst was characterized by various methods including Fourier transform infrared spectroscopy, energy dispersive X-ray spectrometry, vibration sample magnetometry, X-ray diffraction and field emission scanning electron microscopy. To improve the adsorption performance, some important parameters affecting dye removal were optimized such as adsorbent dosage, contact time, solution pH, initial dye concentration and ionic strength. At the optimum conditions, the maximum capacity of adsorption for this nanocomposite was 270.2 mg g −1 , which is better than other magnetic adsorbents for CR removal. The results of adsorption isotherm were matched with Langmuir model. Kinetic tests show that adsorption experimental data were best fitted by pseudo-first-order model. Graphical abstract

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Physical and Chemical Methods for Selenium Removal

Kaviya

2021

Selenium Contamination in Water

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Pb(II) adsorption on magnetic γ-Fe2O3/titanate nanotubes composite

Cited by 26 publications

References 51 publications

Adsorption of cadmium by a high-capacity adsorbent composed of silicate-titanate nanotubes embedded in hydrogel chitosan beads

Adsorption of cadmium by a high-capacity adsorbent composed of silicate-titanate nanotubes embedded in hydrogel chitosan beads

One-pot synthesis of S-doped Fe2O3/C magnetic nanocomposite as an adsorbent for anionic dye removal: equilibrium and kinetic studies

Physical and Chemical Methods for Selenium Removal

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