ORIGINAL RESEARCH
Electrospinning Synthesis of Hydroxyapatite
Nanofibers Assembled from Nanorods and their
Adsorption for Heavy Metal Ions
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1
Institute of Environmental and Municipal Engineering, North China University of Water Resources
and Electric Power, Zhengzhou, P.R. China
2
Henan Engineering Research Center of Water Pollution and Soil Damage Remediation
3
Henan Key Laboratory of Water Environment Simulation and Treatment
4
Henan Chemical Industry Research Institute Co. Ltd, Zhengzhou, P.R. China
Submission date: 2017-12-31
Final revision date: 2018-01-30
Acceptance date: 2018-02-07
Online publication date: 2018-08-31
Publication date: 2018-12-20
Corresponding author
Yuanyuan Zhou
North China University of Water Resources and Electric power, No. 136, Jinshui East Road, Zhengzhou, Henan, 450046 Zhengzhou, China
Pol. J. Environ. Stud. 2019;28(2):981-988
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ABSTRACT
In this work, porous HAP nanofibers assembled from nanorods were developed as potential devices
for the treatment of Cu(II), Cd(II), and Pb(II) contamination of consumable waters. Two steps were
employed in the HAP nanofibers fabrication. First, rod-like HAP nanoparticles were synthesized through
a chemical pathway from Ca(NO3)2·4H2O, (NH4)2HPO4, and polyvinylpyrrolidone (PVP) as a capping
agent. The subsequent electrospinning was performed to fabricate the PVP/HAP hybrid nanofibers as
precursors to obtain pure HAP nanofibers assembled from nanorods via a calcination process. The effects
of PVP dosage on morphology was investigated. And a possible formation mechanism of rod-like HAP
was proposed. Then the removal efficiency of porous HAP nanofibers toward Cu(II), Cd(II), and Pb(II)
were evaluated via sorption kinetics and sorption isotherms. Our results proved that the sorption kinetic
data were well fitted by the pseudo second-order rate equation, and the adsorption of Cu2+, Cd2, and Pb2+
ions on HAP nanofibers correlated well with the Langmuir equation as compared to Freundlich isotherm
equation under the concentration range studied. These novel porous HAP nanofibers assembled from
nanorods promise a feasible advance in the development of new, easy to handle, and low-cost water
purifying methods.