Adsorption Isotherm, Kinetic, Thermodynamic, and Desorption Studies of Lanthanum and Dysprosium on Oxidized Multiwalled Carbon Nanotubes

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

doi:10.1080/01932691.2013.785361

Cited by 62 publications

(20 citation statements)

References 53 publications

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“…In both cases, they obtained a 60% of desorption at a pH 3 and more than 90% at pH 1 [73]. For other metals, a desorption greater than 80% has been observed at higher pHs than those used obtained in this study, i.e., pH 4.5 for titanium and pH 3 for Pb 2+ [70,[74][75][76].…”

Section: Desorption Experimentssupporting

confidence: 49%

Enhanced Heavy Metal Removal from Acid Mine Drainage Wastewater Using Double-Oxidized Multiwalled Carbon Nanotubes

Rodríguez

Leiva

2019

Molecules

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Due to the unique properties of carbon nanotubes (CNTs), they have attracted great research attention as an emergent technology in many applications including water and wastewater treatment. However, raw CNTs have few functional groups, which limits their use in heavy metal removal. Nevertheless, their removal properties can be improved by oxidation processes that modify its surface. In this study, we assessed the capacity of oxidized and double-oxidized multiwalled carbon nanotubes (MWCNTs) to remove heavy metals ions from acidic solutions. The MWCNTs were tested for copper (Cu), manganese (Mn), and zinc (Zn) removal, which showed an increment of 79%, 78%, and 48%, respectively, with double-oxidized MWCNTs compared to oxidized MWCNTs. Moreover, the increase in pH improved the sorption capacity for all the tested metals, which indicates that the sorption potential is strongly dependent on the pH. The kinetic adsorption process for three metals can be described well with a pseudo-second-order kinetic model. Additionally, in multimetallic waters, the sorption capacity decreases due to the competition between metals, and it was more evident in the removal of Zn, while Cu was less affected. Besides, XPS analysis showed an increase in oxygen-containing groups on the MWCNTs surface after oxidation. Finally, these analyses showed that the chemical interactions between heavy metals and oxygen-containing groups are the main removal mechanism. Overall, these results contribute to a better understanding of the potential use of CNTs for water treatment.

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Section: Desorption Experimentssupporting

confidence: 49%

Enhanced Heavy Metal Removal from Acid Mine Drainage Wastewater Using Double-Oxidized Multiwalled Carbon Nanotubes

Rodríguez

Leiva

2019

Molecules

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“…Oxidized multiwalled carbon nanotubes were examined for the removal of La 3+ [54]. Maximum adsorption was found at pH 5-6 and optimum adsorption dosage was 1 g/L.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Oxidized multiwalled carbon nanotubes were used to explore the uptake of Dy 3+ from aqueous media [54]. Maximum adsorption capacity was found at pH 5-6.…”

Section: Adsorption Of Ce 3+ Dy 3+ and Nd 3+mentioning

confidence: 99%

Adsorption of rare earth metals: A review of recent literature

Anastopoulos

Bhatnagar

Lima

2016

Journal of Molecular Liquids

343

122

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“…The negative values obtained for the enthalpy change indicate that the dysprosium adsorption is an exothermic process in all the samples studied. Moreover, the adsorption process is spontaneous and favorable at the different temperatures studied for both ACs, as indicated by the free energy change [28]. Finally, the value calculated for the entropy change was positive in both cases, indicating that the entropy of the system increased during the adsorption, i.e.…”

Section: Equilibrium Isothermsmentioning

confidence: 79%

Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground

Alcaraz

Escudero

Llorente

et al. 2019

Preprint

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This paper describes the physico-chemical study of the adsorption of dysprosium (Dy3+) in aqueous solution onto two types of activated carbons synthesized from spent coffee ground. KOH activated carbon is a microporous material with a specific BET surface area of 2330 m2·g-1 and pores with a diameter of 3.2 nm. Carbon activated with water vapor and N2 is a solid mesoporous, with pores of 5.7 nm in diameter and a specific surface of 982 m2·g-1. A significant dependence of the adsorption capacity on the solution pH was found, while it does not depend significantly neither on the dysprosium concentration nor on the temperature. A maximum adsorption capacity of 31.26 mg·g-1 and 33.52 mg·g-1 for the chemically and physically activated carbons, respectively, were found. In both cases, the results obtained from adsorption isotherms and kinetic study were better fit to a Langmuir model and a pseudo-second-order kinetics. In addition, thermodynamic results indicate that dysprosium adsorption onto both activated carbons is an exothermic, spontaneous and favorable process.

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Adsorption Isotherm, Kinetic, Thermodynamic, and Desorption Studies of Lanthanum and Dysprosium on Oxidized Multiwalled Carbon Nanotubes

Cited by 62 publications

References 53 publications

Enhanced Heavy Metal Removal from Acid Mine Drainage Wastewater Using Double-Oxidized Multiwalled Carbon Nanotubes

Enhanced Heavy Metal Removal from Acid Mine Drainage Wastewater Using Double-Oxidized Multiwalled Carbon Nanotubes

Adsorption of rare earth metals: A review of recent literature

Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground

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