Synthesis and characterization of silica gel microspheres encapsulated by salicyclic acid functionalized polystyrene and its adsorption of transition metal ions from aqueous solutions

• Authors: Qiang Xu , Ping Yin , Guifang Zhao , Gui Yin , Rongjun Qu
• Languages of publication: EN

Abstracts

EN

The present study was undertaken to develop a novel adsorbent for heavy metal ions, and this paper presents the synthesis and characterization of a composite material-silica gel microspheres encapsulated by salicyclic acid functionalized polystyrene (SG-PS-azo-SA) with a core-shell structure. SG-PS-azo-SA was used to investigate the adsorption of Mn(II), Co(II), Ni(II), Fe(III), Hg(II), Zn(II), Cd(II), Cr(VI), Pd(II), Cu(II), Ag(I), and Au(III) from aqueous solutions. The results revealed that SG-PS-azo-SA has better adsorption capacity for Cu(II), Ag(I) and Au(III). Langmuir and Freundlich isotherm models were applied to analyze the experimental data, the best interpretation for the experimental data was given by the Langmuir isotherm equation with the maximum adsorption capacity for Cu(II), Ag(I), and Au(III) at 1.288 mmol g−1, 1.850 mmol g−1 and 1.613 mmol gt-1, respectively. Thus, silica gel encapsulated by salicyclic acid functionalized polystyrene (SG-PS-azo-SA) is favorable and useful for the removal of Cu(II), Ag(I) and Au(III) metal ions. [...]

Keywords

EN

Chemical synthesis; Silica gel; Salicylic acid; Encapsulation; Adsorption

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2010
• Volume: 8
• Issue: 1
• Pages: 214-222

Dates

published

1 - 2 - 2010

online

16 - 2 - 2010

Contributors

author

Qiang Xu

• School of Chemistry and Materials Science, Ludong University, Yantai, 264025, P. R. China

author

Ping Yin

• School of Chemistry and Materials Science, Ludong University, Yantai, 264025, P. R. China

author

Guifang Zhao

• School of Chemistry and Materials Science, Ludong University, Yantai, 264025, P. R. China

author

Gui Yin

• Department of Chemistry, Nanjing University, Nanjing, 210093, P. R. China

author

Rongjun Qu

• School of Chemistry and Materials Science, Ludong University, Yantai, 264025, P. R. China

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Identifiers

DOI

10.2478/s11532-009-0113-0