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  • A nanofiber functionalized with dithizone by co-electrospinning for lead (II) adsorption from aqueous media.

A nanofiber functionalized with dithizone by co-electrospinning for lead (II) adsorption from aqueous media.

Journal of hazardous materials (2011-09-29)
Jianjun Deng, Xuejun Kang, Liqin Chen, Yu Wang, Zhongze Gu, Zuhong Lu
ABSTRACT

An electrospun nanofiber was utilized as a sorbent in packed fiber solid phase extraction (PFSPE) for selective separation and preconcentration of lead (II). The nanofiber had a polystyrene (PS) backbone, which was functionalized with dithizone (DZ) by co-electrospinning of a PS solution containing DZ. The nanofiber exhibited its performance in a cartridge prepared by packing 5mg of nanofiber. The nanofiber was characterized by a scanning electron microscope and IR spectra. The diameter of the nanofiber was less than 400 nm. After being activated by 2.0 mol L(-1) NaOH aqueous solution, the nanofiber quantitatively sorbed lead (II) at pH 8.5, and the metal ion could be desorbed from it by three times of elution with a small volume of 0.1 mol L(-1) HNO(3) aqueous solution. The breakthrough capacity was 16 μg mg(-1). The nanofiber could be used for concentration of lead (II) from water and other aqueous media, such as plasma with stable recovery in a simple and convenient manner.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Dithizone, ACS reagent, for spectrophotometric det. of Cd, Cu, Hg, Pb, Zn, ≥98.0% (TLC)
Sigma-Aldrich
Dithizone, Practical Grade
Sigma-Aldrich
Dithizone, JIS special grade, ≥85.0%