当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES期刊下所有文献 > Synthesis of multi-functionalized Fe3O4-NH2-SH nanofiber based on chitosan for single and simultaneous adsorption of Pb(II) and Ni(II) from aqueous system.

Synthesis of multi-functionalized Fe3O4-NH2-SH nanofiber based on chitosan for single and simultaneous adsorption of Pb(II) and Ni(II) from aqueous system.

Abstract：

:A multi-functionalized poly ether sulfone (PES)/ chitosan (CS)/Fe3O4-NH2-SH nanofiber was applied for single and simultaneous removal of Pb(II) and Ni(II) ions from water systems. The structure of nanofibers was evaluated using FTIR, FESEM, BET, BJH, TGA, EDX and XPS analyses. The characterization results showed that the structure of nanofibers was well maintained after adsorption process. The simultaneous effects of solution pH, adsorbent dosage and Fe3O4-NH2-SH content were studied using response surface methodology (RSM). The predicted optimum conditions were identified for both Pb(II) and Ni(II) ions. Furthermore, the influence of contact time, initial ion concentration and temperature were investigated to evaluate the adsorption kinetics, isotherms and thermodynamics, respectively. Kinetic data fitted well to the double-exponential model for both Pb(II) and Ni(II) ions. Also, the results of isotherm investigation showed that a monolayer adsorption onto the PES/CS/Fe3O4-NH2-SH nanofiber was dominant. The maximum adsorption capacity of CS/PES/Fe3O4-NH2-SH was 282.4 mg/g for Pb(II) ions and 95.3 mg/g for Ni(II) ions. The regeneration test of nanofiber adsorbent displayed that the adsorption capacity did not changed significantly after 4 desorption steps. In binary system, the adsorption capacity decreased with the increase of competitive ion concentration. The selectivity of different metal ions followed the order of Pb(II) > Cu(II) > Ni(II) > Co(II) > Zn(II).

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Jafarnejad M,Asli MD,Taromi FA,Manoochehri M

doi

10.1016/j.ijbiomac.2020.01.017

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

201-217

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(19)38239-X

journal_volume

148

pub_type

杂志文章

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