TY - JOUR
T1 - Halloysite nanotubes and Fe3O4 nanoparticles enhanced adsorption removal of heavy metal using electrospun membranes
AU - Li, Lei
AU - Wang, Feijun
AU - Lv, Yanyan
AU - Liu, Jianxin
AU - Zhang, Dalun
AU - Shao, Ziqiang
N1 - Publisher Copyright:
© 2018
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Magnetic nonwovens had been strategically prepared by immobilizing halloysite (Hal) nanotubes and Fe3O4 nanoparticles on polyethylene oxide/chitosan (PEO/CS) composite fibers via electrospinning. TEM, XPS, XRD, FTIR, UV–vis DRS, BET, and VSM analyses of the adsorbents were used to determine their structure and performance. The effect of organic-inorganic hybridization provided the as-obtained adsorbents with uniform structure, superior pore structure, large specific surface area, and superparamagnetic properties. These nonwovens also exhibited high removal efficiency of different heavy metal ions (HMIs), and the adsorption capacity of cadmium, copper, lead and chrome onto the nonwoven was in order of Cr(VI) < Cd(II) < Cu(II) < Pb(II). The pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models were employed to analyze the kinetic data, which suggested the chemisorption was distinct but the intraparticle-diffusion was not significant. The anti-anion interference capability and reusability of membranes for the removal of different HMIs were also determined, which indicated that the nanofibrous adsorbents were widely adaptable and reusable. In addition, the composite membranes showed high antibacterial activity for E. coli and S. aureus. Thus, these proficient inorganic-materials-doped magnetic nonwovens are suitable to employ as a heavy metal adsorbents with salient removal capacity.
AB - Magnetic nonwovens had been strategically prepared by immobilizing halloysite (Hal) nanotubes and Fe3O4 nanoparticles on polyethylene oxide/chitosan (PEO/CS) composite fibers via electrospinning. TEM, XPS, XRD, FTIR, UV–vis DRS, BET, and VSM analyses of the adsorbents were used to determine their structure and performance. The effect of organic-inorganic hybridization provided the as-obtained adsorbents with uniform structure, superior pore structure, large specific surface area, and superparamagnetic properties. These nonwovens also exhibited high removal efficiency of different heavy metal ions (HMIs), and the adsorption capacity of cadmium, copper, lead and chrome onto the nonwoven was in order of Cr(VI) < Cd(II) < Cu(II) < Pb(II). The pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models were employed to analyze the kinetic data, which suggested the chemisorption was distinct but the intraparticle-diffusion was not significant. The anti-anion interference capability and reusability of membranes for the removal of different HMIs were also determined, which indicated that the nanofibrous adsorbents were widely adaptable and reusable. In addition, the composite membranes showed high antibacterial activity for E. coli and S. aureus. Thus, these proficient inorganic-materials-doped magnetic nonwovens are suitable to employ as a heavy metal adsorbents with salient removal capacity.
KW - Antibacterial
KW - Electrospinning
KW - FeO
KW - Halloysite nanotubes
KW - Heavy metal
UR - http://www.scopus.com/inward/record.url?scp=85046097163&partnerID=8YFLogxK
U2 - 10.1016/j.clay.2018.04.002
DO - 10.1016/j.clay.2018.04.002
M3 - Article
AN - SCOPUS:85046097163
SN - 0169-1317
VL - 161
SP - 225
EP - 234
JO - Applied Clay Science
JF - Applied Clay Science
ER -