Comparative and competitive adsorption of Pb(II) and Cu(II) using tetraethylenepentamine modified chitosan/CoFe 2 O 4 particles

Fan, Chunzhen; Li, Kan; Li, Juexiu; Ying, Deng; Wang, Yalin; Jia, Jinping

doi:10.1016/j.jhazmat.2016.12.036

Cited by 163 publications

(33 citation statements)

References 41 publications

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“…The adsorption efficiency is relatively low at a pH value lower than 5, which may be due to the fact that the concentration and activity of H + ions are high, and more surface active sites of the MH-SEP could be occupied by the adsorbed H + ions, resulting in the adsorption competition with the cadmium ions. 42,43 Meanwhile, the transport and transfer rate of heavy metal ions on the surface of sepiolite mineral nanobers could be affected by the electrostatic effect between the H + and cadmium ions. As the pH of the solution increases, more active groups on the surface of the sepiolite bers are exposed, which greatly promotes the contact and coverage of cadmium cations onto the surface of the sepiolite mineral nanobers.…”

Section: Resultsmentioning

confidence: 99%

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions

et al. 2019

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Section: Resultsmentioning

confidence: 99%

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions

et al. 2019

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“…Using the adsorption rate equation (3) proposed on the competitive adsorption, some binary adsorption experiment data [60][61][62] were kinetically reevaluated.…”

Section: The Comparison Of Kinetic Parameters On Competitive Adsorptionmentioning

confidence: 99%

“…Kinetic parameters reevaluated by equation (3) on the binary adsorption of Cu (II) and Pb (II) onto two types of chitosan 61 were shown in Table 5. …”

Section: The Comparison Of Kinetic Parameters On Competitive Adsorptionmentioning

confidence: 99%

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A New Adsorption Rate Equation in Batch Systems

Hong¹,

Sin²,

Pak³

et al. 2018

Preprint

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In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, ne w adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data. This work is a new vie w on the adsorption kinetics rather than a comment on the previous adsorption papers.Many adsorption kinetic models had been proposed and used during about 120 years. The frequently used and recently established 28 models 1-31 were listed in Table S1. The development of adsorption kinetic model has been conducted to obtain the specific models that agree better with the experimental data, as the result, dozens of kinetic models were established. The most of them were based on the Lagergren model 1 (in 1898) and Langmuir kinetic model 24 (in 1918), there were no innovative development. The Deficiencies and Cause of Previous Adsorption Kinetic ModelsCan those be used for the calculation of activation e nergy? One of the important objectives of kinetic study is to evaluate activation energy. Activation energy is the energy which must be available to a chemical system with potential reactants to result in a reaction. Activation energy is obtained by Arrhenius equation and the rate constants of different temperature.Activation energy can't be evaluated by the many of previous adsorption kinetic models, such as the pseudo-order models [1][2][3][4][12][13][14][15] and its changed types [5][6][7][8][20][21][22][23] . These models involve the adsorption amount q e (No. 1-9 and No. 13-21 in Table S1). When Arrhenius equation is used to calculate activation energy, the rate constants must be a constant at given temperature. However, not only the

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“…There is an urgent need for a method to remove heavy metals from sewage to meet the growing environmental quality requirements [7]. Common methods for treating heavy metal ion pollutants in wastewater include chemical precipitation, extraction, membrane separation, ion exchange, electrochemical and adsorption [8][9][10][11][12][13][14]. The adsorption method has gradually entered the researcher's line of sight because of its simple operation, safety, simple equipment, low cost, wide applicability and possible recyclability of the adsorbents [15].…”

Section: Introductionmentioning

confidence: 99%

Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Wang

Lei

Kang

et al. 2020

Mater. Res. Express

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The graphene oxide(GO)/polyacrylic acid(PAA) was prepared by in situ polymerization in graphene oxide lamellae, and crosslinked graphene oxide/polyacrylic acid complex(CLGO/PAA) was formed by esterification reaction between 1,4-butanediol and carboxylic acid of PAA at same time. The CLGO/PAA aerogel was prepared by freeze drying method. The CLGO/PAA aerogel has good stability and high saturated adsorption capacity for the adsorption of Pb(II) ions in water. The structure and properties of the CLGO/PAA aerogel were characterized by using x-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), infrared spectroscopy(FT-IR), and atomic absorption spectrometer(AAS), respectively. The results show that the prepared CLGO/PAA aerogel possess elliptical pore structure. In addition, the adsorption properties of the CLGO/PAA aerogel for Pb(II) in water were studied under different pH, different concentrations of Pb(II), contact time and number of adsorbent cycles. The results show that the adsorption amount of Pb(II) could reach to 640 mg g −1 at the initial concentration of Pb(II) was 500 mg l −1 , and the adsorption equilibrium could be reached after 60 min. The adsorption amount for Pb(II) was still 143 mg g −1 after 5 times cycle.

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Comparative and competitive adsorption of Pb(II) and Cu(II) using tetraethylenepentamine modified chitosan/CoFe 2 O 4 particles

Cited by 163 publications

References 41 publications

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions

A New Adsorption Rate Equation in Batch Systems

Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

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Comparative and competitive adsorption of Pb(II) and Cu(II) using tetraethylenepentamine modified chitosan/CoFe 2 O 4 particles

Cited by 163 publications

References 41 publications

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd2+ ions

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd2+ ions

A New Adsorption Rate Equation in Batch Systems

Preparation of the crosslinked GO/PAA aerogel and its adsorption properties for Pb(II) ions

Contact Info

Product

Resources

About

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions

A facile fabrication of sepiolite mineral nanofibers with excellent adsorption performance for Cd²⁺ ions