Adsorptive removal of fluoride from aqueous solution using single- and multi-walled carbon nanotubes

Dehghani, Mohammad Hadi; Haghighat, Gholam Ali; Yetilmezsoy, Kaan; McKay, Gordon; Heibati, Behzad; Tyagi, Inderjeet; Agarwal, Shilpi; Gupta, Vinod Kumar

doi:10.1016/j.molliq.2016.01.057

Cited by 106 publications

(22 citation statements)

References 65 publications

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“…It was noted that the synthetic adsorbent Mg/Fe/La CHLc had a higher adsorption capacity than most of other adsorbents reported, such as carbon-based, 13,37 alumina-based, 12,38 other metal oxide 14,39 and layered double hydroxide 32,40 materials (listed in Table 4). Although the adsorption capacity of some adsorbents like La modied seaweed was higher than that of Mg/Fe/La CHLC, the reaction time was longer and the preparation method was more complicated.…”

Section: Characterization Of Materialsmentioning

confidence: 90%

“…10 Numerous natural or synthetic materials have been used as uoride adsorbents, such as red mud, alum sludge, carbon nanotubes and mixed metal oxides. [11][12][13][14][15] However, the adsorption and desorption performance was limited because of the structure of these material. It might be a good idea to use nano-scale layered materials to remove uoride from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of fluoride at the interface of water with calcined magnesium–ferri–lanthanum hydrotalcite-like compound

Xia³

et al. 2017

RSC Adv.

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Section: Characterization Of Materialsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Adsorption of fluoride at the interface of water with calcined magnesium–ferri–lanthanum hydrotalcite-like compound

Xia³

et al. 2017

RSC Adv.

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“…It is observed that the adsorption capacity increased rapidly during the first 360 min and then gradually slowed down to reach equilibrium at 1080 min. This might be attributed to the fact that a large number of active sites were available for adsorption of uranium resulting in rapid adsorption during the early stage, while the adsorption rate became slower due to the increasing occupation of active sites on the adsorbent …”

Section: Resultsmentioning

confidence: 99%

“…This might be attributed to the fact that a large number of active sites were available for adsorption of uranium resulting in rapid adsorption wileyonlinelibrary.com/jctb during the early stage, while the adsorption rate became slower due to the increasing occupation of active sites on the adsorbent. 38 In order to investigate the mechanism controlling the adsorption process, the pseudo-first-order and pseudo-second-order kinetic models were applied to evaluate the experimental data. The linear and non-linear equations of pseudo-first-order kinetics are given as follows 39 :…”

Section: Effect Of Contact Time and Kinetic Studiesmentioning

confidence: 99%

Selective adsorption of uranium from salt lake‐simulated solution by phenolic‐functionalized hollow sponge‐like adsorbent

Lin

Yan

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Hydrothermal carbonization has become a proficient technique to synthesize carbon materials from biomass owing to its availability and environmental friendliness. Chrome‐tanned leather, a biomass waste that contains numerous functional groups, is a potential adsorbent for separation of heavy metal ions. In the present work, a phenolic‐functionalized hollow sponge‐like adsorbent (HSLW) was synthesized from leather waste via hydrothermal carbonization in the presence of tannin. This study aims to develop a novel adsorbent for uranium separation from salt lake. RESULTS The adsorbent was characterized by several techniques and the adsorption behavior of the adsorbent towards uranium was investigated. The maximum adsorption capacity of the absorbent reached 200.10 mg g−1 at 328.15 K. The adsorption process fitted well with the linear Freundlich isotherm model and pseudo‐second‐order model. The thermodynamic parameters indicated that the adsorption process was spontaneous, feasible and endothermic in nature. Selective adsorption in competitive multi‐ion solution and simulated high‐salinity system showed that the adsorbent had not only strong affinity but also high selectivity towards uranium. CONCLUSION HSLW could become a promising adsorbent for practical and efficient selective separation and recovery of uranium from salt lakes. © 2018 Society of Chemical Industry

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“…9c, respectively. The constant B gives the mean free energy E (kJ mol -1 ) of adsorption per molecule of the adsorbate when it is transferred from the solid from infinity in the solution [31] and the relation is given as follows:…”

Section: Dubinin-radushkevich Isothermmentioning

confidence: 99%

Removal of sulfate from aqueous solution by magnetic chitosan microspheres

Tian¹,

Zhao²,

Feng³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tThe magnetic chitosan microspheres (Fe 3 O 4 /CS) were prepared by inverse suspension cross-linking and characterized by scanning electron microscope, optical micrographs, Fourier transform infrared spectrophotometer, and X-ray diffraction. They were employed as the adsorbents for the removal of sulfate from the aqueous solutions in the batch system. The magnetic material (Fe 3 O 4 ) used in the preparation of the magnetic chitosan microspheres was prepared by precipitation from FeCl 2 and FeCl 3 solutions in the basic medium. The experimental results showed that Fe 3 O 4 /CS was an excellent adsorbent for the removal of sulfate with an adsorption capacity of 256.41 mg g -1 . Equilibrium isotherm study showed a good agreement with the Langmuir isotherm equation for the monolayer adsorption process, while the adsorption process can be well described by the second-order kinetic model and the Dubinin-Radushkevich isotherm further confirmed the presence of physical adsorption forces.

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Adsorptive removal of fluoride from aqueous solution using single- and multi-walled carbon nanotubes

Cited by 106 publications

References 65 publications

Adsorption of fluoride at the interface of water with calcined magnesium–ferri–lanthanum hydrotalcite-like compound

Adsorption of fluoride at the interface of water with calcined magnesium–ferri–lanthanum hydrotalcite-like compound

Selective adsorption of uranium from salt lake‐simulated solution by phenolic‐functionalized hollow sponge‐like adsorbent

Removal of sulfate from aqueous solution by magnetic chitosan microspheres

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