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Synthesis of magnetic graphene nanocomposites decorated with ionic liquids for fast lead ion removal.

Abstract：

:Seeking highly-efficient, low-cost and robust methods to remove metal ions from aqueous solutions is very much in demand. Here, we developed a novel magnetic composite bio-adsorbent, graphene oxide and magnetic chitosan-ionic liquids (GOMCS-ILs), for removing Pb(II) from water. This was the first time to combine ionic liquids and graphene oxide and magnetic chitosan, and apply to the adsorption of metal ions. The addition of ionic liquids can not only improve the dispersivity of the adsorbent, but also increase the adsorption sites. The characteristic result of FTIR, SEM, and XRD showed that GOMCS-ILs were prepared with large surface area and good magnetic responsiveness. The influence of various analytical parameters on the adsorption of Pb(II) such as pH, contact time, and initial ion concentration were studied in detail. The adsorption followed a pseudo second order kinetics. The equilibrium adsorption was well-described by the Langmuir isotherm model and the maximum adsorption capacity was to be 85mgg(-1). Moreover, the GOMCS-ILs could be repeatedly used by simple treatment without obvious structure and performance degradation. These results demonstrated the potential applications of GOMCS-ILs microspheres in efficient removal of Pb(II) from wastewater and deep-purification of polluted water.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Sun W,Li L,Luo C,Fan L

doi

10.1016/j.ijbiomac.2015.09.061

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

246-51

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(15)00676-5

journal_volume

85

pub_type

杂志文章

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