Three-dimensional g-C3N4/MgO composites as a high-performance adsorbent for removal of Pb(II) from aqueous solution

A novel, three-dimensional material of g-C 3 N 4 /MgO was prepared by pyrolysis method. The adsorption behavior for Pb(II) onto g-C 3 N 4 /MgO was systematically investigated. The adsorption experiments confirmed that the g-C 3 N 4 /MgO exhibited remarkable adsorption performance owing to its rough...

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Bibliographic Details
Published in:Separation science and technology 2019-11, Vol.54 (17), p.2817-2829
Main Authors: Zhou, Jianjun, Ji, Xionghui, Zhou, Xiaohui, Guo, Jing, Sun, Junyu, Liu, Yaochi
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Carbon nitride
composites
Endothermic reactions
G-C
Isotherms
Kinetics
Lead
Magnesium oxide
MgO
Morphology
Pb(II)
Pyrolysis
Reaction kinetics
Three dimensional composites
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Summary:A novel, three-dimensional material of g-C 3 N 4 /MgO was prepared by pyrolysis method. The adsorption behavior for Pb(II) onto g-C 3 N 4 /MgO was systematically investigated. The adsorption experiments confirmed that the g-C 3 N 4 /MgO exhibited remarkable adsorption performance owing to its rough morphology and abundant active sites on the surface. The maximum adsorption capacities for Pb(II) reached to 220.3, 226.2 and 235.1 mg/g at 308 K, 318 K and 328 K, respectively. The optimum adsorbent dosage was 1.0 g/L. The adsorption kinetics and isotherm could be well described by the pseudo-second-order model and Langmuir isotherm model, respectively. The adsorption process was spontaneous and endothermic.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2018.1553983