Zhang Q.,Chongqing University |
Liu L.,Chongqing University |
Liu Y.-C.,Chongqing University |
Zhang C.,Chongqing University |
And 4 more authors.
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2013
Polyvinyl alcohol/polyetherimide(PVA/PEI) nanofibers were fabricated by electrospinning. Subsequently, the nanofibers were functionalized with carbon disulfide to form polyvinyl alcohol/dithiocarbamates(PVA/DTC) nanofibers with higher adsorption capacity for heavy metal ions. The adsorption performance of PVA/DTC nanofibers for lead as well as the crosslinking and functionalization reaction PVA/PEI were investigated. The experimental data show that the fibers have diameters in hundreds nanometers and good appea-rance. The microstructure of nanofiber almost kept unchanged after crosslinking process and functionalization. The PVA/DTC nanofibers with good regeneration power possess much rapid adsorption and higher adsorption capacity. It is potential adsorption material for efficently removal heavy metal ions from waste water.
Luo L.,Chongqing University |
Zhang S.,Chongqing University |
Qiang Y.,Chongqing University |
Qiang Y.,University of Sichuan |
And 4 more authors.
International Journal of Electrochemical Science | Year: 2016
In this paper, the anti-corrosive effect of an ionic liquid named 1-allyl-3-butylimidazalium bromine for X65 steel in 0.5 M H2SO4 has been systematically studied via various electrochemical techniques, containing weight loss experiments, electrochemical tests, scanning electron microscope (SEM), theoretical calculations. The results obtained from weight loss experiments and electrochemical tests displayed that [ABlm]Br served as a mixed-type inhibitor primarily controlling cathode corrosion process and the anti-corrosive efficiency (up to 90.38% at 10 mM) improved with the increase of the concentration. Besides, it was found that the adsorption of the organic molecules on X65 steel substrate followed the Langmuir adsorption isotherm and surface topography of X65 steel was characterized using Scanning electron microscopy (SEM). In addition, theoretical calculations suggested that investigated inhibitor was flat-lying adsorbed on the X65 steel surface. © 2016 The Authors.
Tong L.,Chongqing University |
Chen J.,Chongqing University |
Yuan Y.,Chongqing University |
Cui Z.,Chongqing University |
And 6 more authors.
Journal of Applied Polymer Science | Year: 2015
A novel Pb(II) ion-imprinted chelating nanofibers (nIIP), synthesized by combining electrospinning with surface ion imprinting technique, was reported in this study. nIIP was characterized with Fourier transmission infrared spectrometry and scanning electron microscopy, respectively. The performance of nIIP for Pb(II) sorption was conducted through a batch adsorption experiments. Experimental data showed that adsorption capacity of nIIP was much higher than that of non-ion imprinted chelating acrylic microfibers (mNIP) derived from commercial available acrylic microfibers, and adsorption behaviors agreed well with pseudo-second-order kinetic and Langmuir isotherm model. The values of Gibbs free energy change derived from experimental data suggested that the adsorption Pb(II) on nIIP is spontaneous and favorable at high temperature. In addition, nIIP had the highest selectivity among three tested fibrous adsorbents for Pb(II) from binary metal solution, the selectivity coefficients for Pb(II) from binary metal solution of Pb(II)/Cu(II), Pb(II)/Ni(II), and Pb(II)/Cd(II) onto nIIP were 47, 101, and 162, respectively. Besides, a forty adsorption/desorption cycles revealed that nIIP was a promising recyclable adsorbent. In conclusion, the novel nIIP is a highly effective adsorbent for enrichment and separation of Pb(II) in the presence of competitive ions in aqueous solution, and it is potential to be applied for recovering metals from heavy metal polluted industrial wastewater such as Pb(II)/Cd(II), Pb(II)/Ni(II), and Pb(II)/Cu(II) polluted wastewater. © 2014 Wiley Periodicals, Inc.