High recovery of lead ions from aminated polyacrylonitrile nanofibrous affinity membranes with micro/nano structure.
Guishan Hong , Xiong Li , Lingdi Shen , Min Wang , Ce Wang , Xufeng Yu , Xuefen Wang
Journal of Hazardous Materials, Volume 295
doi:10.1016/j.jhazmat.2015.04.020
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Graphical abstract
Abstract
In this paper, highly
porous polyacrylonitrile (PAN) nanofibrous membranes were successfully
fabricated by wet-electrospinning technique from PAN and poly(vinyl
pyrrolidone) (PVP) blended solution using hot water bath as extractor, and
then aminated with diethylene triamine (DETA). The obtained aminated PAN
(APAN) nanofibrous mats showed unique micro/nano structures and possessed
extra high extraction capability for the removal of lead ions (Pb2+) from
aqueous solution (maximum uptake capacity of Pb2+ was up to 1520.0mg/g), and
could maintain over 90% of its extraction capacity at the sixth cycle of
extraction-dissociation. Interestingly, the hexagonal crystals of basic
lead(II) carbonate (Pb3(CO3)2(OH)2) grown on micro/nano structured APAN
nanofibers were observed when APAN membrane was immersed in Pb(II) ions
aqueous solution. The results provided new insights for the removal of metal
ions by metal crystal growth from wastewater with high recovery.静电纺丝设备
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