Electrospun superhydrophilic membranes for effective removal of Pb(ii) from water. Issue 1 (5th October 2018)

• Record Type: Journal Article
• Authors: Zang, Linlin; Lin, Ru; Dou, Tianwei; Lu wang, ; Ma, Jun; Sun, Liguo
• Is Part Of: Nanoscale advances. Volume 1:Issue 1(2019)
• Page Start: 389
• Page End: 394
• Publication Date: 2018-10-05
• Subjects: 620.5
• DOI: 10.1039/c8na00044a
• Languages: English
• ISSNs: 2516-0230

Abstract

Abstract : Electrospun hydrogel-wrapped membranes with a tunable thickness of the functional shell of the nanofibers are used to adsorb Pb(ii ) in aqueous solution. Abstract : Nanofibrous membranes have a high specific surface area and large porosity, which are beneficial for being used as adsorbents to remove heavy metal ions from water. In this work, electrospun nanofibers were wrapped with a hydrogel layer with a tunable thickness, which endowed the membrane with excellent superhydrophilic performance. Because of good water-retention properties and abundant functional groups originating from the hydrogel layer, as a static adsorbent, the maximum adsorption capacity of Pb(ii ) was up to 146.21 mg g −1 according to the Langmuir model. Meanwhile, the electrospun membrane also possessed water permeability as a flow-through membrane for dynamic adsorption, which was obviously different from traditional hydrogel adsorbents. As a result, the rejection ratio of Pb(ii ) can remain over 55% after running for 72 h under high pH conditions and at low initial ion concentrations. Apart from these, cycle operations confirmed the regeneration of the membrane, and competitive adsorption experiments illustrated the selective removal of Pb(ii ) in a mixed ion solution.