title: A nanofiber functionalized with dithizone by co-electrospinning for lead (II) adsorption from aqueous media.
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.
authors.affiliation: Key Laboratory of Child Development and Learning Science (Ministry of Education), Research Center for Learning Science, Southeast University, Nanjing 210096, China.
authors.forename: Jianjun
authors.initials: J
authors.lastname: Deng
authors.forename: Xuejun
authors.initials: X
authors.lastname: Kang
authors.forename: Liqin
authors.initials: L
authors.lastname: Chen
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhongze
authors.initials: Z
authors.lastname: Gu
authors.forename: Zuhong
authors.initials: Z
authors.lastname: Lu
mesh_terms: D000327:Adsorption; D004230:Dithizone / Q000737:chemistry*; D055664:Electrochemical Techniques; D004867:Equipment Design; D007854:Lead / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D012399:Rotation; D052616:Solid Phase Extraction / Q000379:methods*; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D014874:Water Pollutants, Chemical; D007854:Lead; D004230:Dithizone