Adsorption ability of oxidized multiwalled carbon nanotubes towards aqueous Ce(III) and Sm(III)

Behdani, Fattaneh Naderi; Rafsanjani, Alireza Talebizadeh; Torab‐Mostaedi, Meisam; Koochaki, Amin

doi:10.1007/s11814-012-0126-9

Cited by 51 publications

(13 citation statements)

References 39 publications

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“…As shown, value of 1.569 kJ mol −1 is obtained in the present study which clarified that adsorption of samarium(III) ions onto the synthesized core-shell polymeric adsorbent is dominated by physical process [18].…”

Section: Estimation Of Adsorption Energysupporting

confidence: 71%

“…Most of the conventional physicochemical processes, ion exchange, solvent extraction, chemical precipitation and membrane technology, employed for removal of lanthanides from aqueous solutions [14][15][16][17] have some disadvantages such as high consumption of reagent and energy, low selectivity, high operational cost and generation of secondary pollutants [18,19]. On the other hand, adsorption as a solid-liquid extraction method has recently become the most cost-effective for metals removal because of its advantages of high efficiency over a wide concentration range, easy operation, fast kinetics, low secondary pollution, high recovery and possibility of adsorbent regeneration [12,18].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, adsorption as a solid-liquid extraction method has recently become the most cost-effective for metals removal because of its advantages of high efficiency over a wide concentration range, easy operation, fast kinetics, low secondary pollution, high recovery and possibility of adsorbent regeneration [12,18]. Adsorption method has been efficiently applied for removal of lanthanides from aqueous solutions [12,18,[20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

2015

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Adsorption behavior of samarium(III) radionuclides from aqueous solutions onto a novel polyacrylonitrile coated with sodium dodecyl sulfate (PAN@SDS), prepared by gamma radiation-induced polymerization, was studied in this work. The developed polymeric adsorbent was characterized by FT-IR, X-ray diffraction and N 2 adsorption-desorption. The influence of some experimental parameters such as pH, initial samarium(III) concentration, SDS concentration, temperature, ionic strength and contact time on the adsorption efficiency of samarium(III) was evaluated. Results showed that adsorption efficiency of about 97% was attained for samarium (III) in the pH range 3.8-7.5. The kinetic study showed that samarium(III) was efficiently removed within 10 min and equilibrium was attained at around 30 min. Six isotherm models; Freundlich, Langmuir, Generalized, RedlichPeterson, Toth and Sips, were used to fit the adsorption equilibrium data, and the best-fit three-parameter isotherms suggest that adsorption capacity of PAN@SDS for samarium(III) to be 97.73 mg g −1 , which is a markedly high value compared to most of the other adsorbents reported for other metal ions. Using the Dubinin-KaganerRadushkevich (DKR) model, the mean free energy was calculated as 1.569 kJ mol-1, which suggested that adsorption of samarium(III) was dominated by physisorption. Results of the thermodynamic parameters, G o , S o and H o , showed that adsorption of samarium(III) onto PAN@SDS was feasible, spontaneous and exothermic in nature. Of the various studied kinetic models, the experimental kinetic data were best fitted to the modified multiplex model, and the adsorption process was mainly controlled by particle diffusion. Desorption studies showed that 95% of samarium(III) loaded on PAN@SDS were recovered using 2 mol L −1 HCl.

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Section: Estimation Of Adsorption Energysupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

2015

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“…All the studies were performed in Milli-Q or distilled water, with the exception of only one study performed by Yadav et al [105] that used HCl (aq, 0.5 M). Regarding the contact time between the nanocomposite and the rare earth solution, there was a wide range of times used, although no studies published exceeded 96 hours and the majority had 2–4 h duration [98,105,106,107,108]. Temperature was tested between 20 and 65 °C, although most of the reported studies were performed at 30 °C [105,106,107].…”

Section: Recovery Of Rare Earth From E-wastementioning

confidence: 99%

Recovery of Rare Earth Elements by Carbon-Based Nanomaterials—A Review

et al. 2019

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Modern societies depend strongly on electronic and electric equipment (EEE) which has a side effect result on the large production of electronic wastes (e-waste). This has been regarded as a worldwide issue, because of its environmental impact—namely due to non-adequate treatment and storage limitations. In particular, EEE is dependent on the availability of rare earth elements (REEs), considered as the “vitamins” of modern industry, due to their crucial role in the development of new cutting-edge technologies. High demand and limited resources of REEs in Europe, combined with potential environmental problems, enforce the development of innovative low-cost techniques and materials to recover these elements from e-waste and wastewaters. In this context, sorption methods have shown advantages to pre-concentrate REEs from wastewaters and several studies have reported the use of diverse nanomaterials for these purposes, although mostly describing the sorption of REEs from synthetic and mono-elemental solutions at unrealistic metal concentrations. This review is a one-stop-reference by bringing together recent research works in the scope of the application of carbon nanomaterials for the recovery of REEs from water.

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“…Nitric acid-oxidized multi-walled carbon nanotubes were used to adsorb cerium(III) and samarium(III) from aqueous solutions (Naderi Behdani et al, 2013). In both cases, the percentage of metal removal increases with the increase of the aqueous pH, being the maximum metal uptake 88.6 and 93.3 mg g −1 for Sm(III) and Ce(III), respectively.…”

Section: Rare Earths Elementsmentioning

confidence: 99%

Technologies for the 21<sup>st</sup> century: carbon nanotubes as adsorbents of metals

Cerpa¹,

Lado²,

López³

2014

REVMETAL

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Nowadays and in the recent past when the word "nano" appeared in almost anything it attracted immediate attention and interest, this is why carbon nanotubes, since its discovery nearly twenty years ago, caught the interest of a wide scientific and industrial population to apply the somewhat amazing properties of these nanomaterials in a number of applications. Among them, the removal of toxic and sometimes profitable metals from aqueous streams appeared, due to its economical and social impact, as one of the targets for their uses. This paper reviews some recent advances (2009-2013 years) in the application of carbon nanotubes materials in the removal of a variety of metals from these aqueous streams.

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Adsorption ability of oxidized multiwalled carbon nanotubes towards aqueous Ce(III) and Sm(III)

Cited by 51 publications

References 39 publications

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

Recovery of Rare Earth Elements by Carbon-Based Nanomaterials—A Review

Technologies for the 21<sup>st</sup> century: carbon nanotubes as adsorbents of metals

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