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Poly(Amidoamine) Dendrimer Modified Superparamagnetic Nanoparticles as an Efficient Adsorbent for Cr(VI) Removal: Effect of High-Generation Dendrimer on Adsorption Performance
Can Cui; Ya-Dian Xie; Jiao-Jiao Niu; Hai-Liang Hu; Sen Lin
2022
Source PublicationJournal of Inorganic and Organometallic Polymers and Materials
Volume32Pages:840–853
Abstract

In this work, three different generations of Poly(amidoamine) dendrimers (PAMAM) decorated on magnetic Fe3O4 composites (Fe3O4@SiO2–G1, Fe3O4@SiO2–G3, Fe3O4@SiO2–G5) were fabricated and characterized by FTIR, XRD, TEM, TGA, VSM and XPS. The obtained composites were used for Cr(VI) removal. Batch adsorption studies showed that the adsorption reached equilibrium within 60 min, and the optimal pH was 3.0. The result of adsorption kinetics was simulated by the pseudo-second-order model. The adsorption equilibrium isotherm was well fitted with the Langmuir adsorption model. Furthermore, thermodynamics calculations revealed that the adsorption process was endothermic and spontaneous. Importantly, adsorption capacity of Cr(VI) obeyed the sequence of Fe3O4@SiO2–G1 < Fe3O4@SiO2–G5 < Fe3O4@SiO2–G3, 3 generation of PAMAM (G3) was the optimal for adsorption capacity of Cr(VI). The maximum theoretical Cr(VI) adsorption capacity (qm) of Fe3O4@SiO2–G3 was 334.45 mg/g, and removal ration remained above 89.5% after five cycles of adsorption–desorption. Thus, Fe3O4@SiO2–G3 is predicted to be an efficient adsorbent for the adsorption of Cr(VI) from aqueous solution, and the obtained results can help in the generation optimization during fabrication of dendrimer modified adsorbents.

DOI10.1007/s10904-021-02222-8
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Indexed BySCI
Language英语
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13626
Collection地球内部物质高温高压实验室
地球深部物质与流体作用地球化学研究室
Affiliation1.School of Chemical Engineering, Guizhou Minzu University, Guiyang, 550025, China
2.Key Laboratory of High-Temperature and High-Pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
Recommended Citation
GB/T 7714
Can Cui,Ya-Dian Xie,Jiao-Jiao Niu,et al. Poly(Amidoamine) Dendrimer Modified Superparamagnetic Nanoparticles as an Efficient Adsorbent for Cr(VI) Removal: Effect of High-Generation Dendrimer on Adsorption Performance[J]. Journal of Inorganic and Organometallic Polymers and Materials,2022,32:840–853.
APA Can Cui,Ya-Dian Xie,Jiao-Jiao Niu,Hai-Liang Hu,&Sen Lin.(2022).Poly(Amidoamine) Dendrimer Modified Superparamagnetic Nanoparticles as an Efficient Adsorbent for Cr(VI) Removal: Effect of High-Generation Dendrimer on Adsorption Performance.Journal of Inorganic and Organometallic Polymers and Materials,32,840–853.
MLA Can Cui,et al."Poly(Amidoamine) Dendrimer Modified Superparamagnetic Nanoparticles as an Efficient Adsorbent for Cr(VI) Removal: Effect of High-Generation Dendrimer on Adsorption Performance".Journal of Inorganic and Organometallic Polymers and Materials 32(2022):840–853.
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