High recovery of lead ions from aminated polyacrylonitrile nanofibrous affinity membranes with micro/nano structure

Hong, Guishan; Li, Xiong; Shen, Lingdi; Wang, Min; Wang, Ce; Yu, Xufeng; Wang, Xuefen

doi:10.1016/j.jhazmat.2015.04.020

Cited by 85 publications

(25 citation statements)

References 35 publications

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“…Moreover, two new peaks at 1566 cm -1 (C=O) and 1651 cm -1 (-NH2) appeared, suggesting the happening of the crosslinking reaction [24]. In the infrared spectrum of PANMW-TSC fibers, three new peaks occurred.…”

Section: Tsc Modification Mw Irradiationmentioning

confidence: 92%

Polyacrylonitrile-based fiber modified with thiosemicarbazide by microwave irradiation and its adsorption behavior for Cd(II) and Pb(II)

Deng

Wang

Zhang

et al. 2016

Journal of Hazardous Materials

128

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A novel thiosemicarbazide modified adsorbent (PAN(MW)-TSC) based on polyacrylonitrile fiber was successfully synthesized under microwave irradiation, which was applied for the uptake of Cd(II) and Pb(II) from aqueous solution subsequently. Microwave irradiation method is a new approach to achieve the modification and it turns out that just a 30min process is enough for the anchoring of functional groups in the fiber matrix. The surface characterization was performed by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) elemental analysis (EA) and thermogravimetric analysis (TGA), indicating that the modification was successfully accomplished. Batch adsorption experiments including equilibrium isotherms, kinetics and the effects of pH and temperature on the adsorption of Cd(II) and Pb(II) were systematically studied. Among three kinetic models, the pseudo-second-order kinetic model provides the best correlation for the process. The nonlinear resolution of the Langmuir isotherm equation has been found to show the closest fit to the equilibrium date. Thermodynamic parameters, involving △G, △H and △S were also calculated from graphical interpretation of the experimental data, which suggest that metal ions adsorption onto PAN(MW)-TSC fibers is spontaneous and exothermic. Regeneration of PAN(MW)-TSC fibers loaded with metal ions was efficiently done with 0.5M HNO3, by which the investigated adsorbent could be used reproductively for five times with a small decrease in sorption capacity. The feasible preparation of PAN(MW)-TSC fibers with high adsorption capacities opens a new perspective in the potential application for wastewater treatment.

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Section: Tsc Modification Mw Irradiationmentioning

confidence: 92%

Polyacrylonitrile-based fiber modified with thiosemicarbazide by microwave irradiation and its adsorption behavior for Cd(II) and Pb(II)

Deng

Wang

Zhang

et al. 2016

Journal of Hazardous Materials

128

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“…Conventional methods for the removal of heavy metals include chemical deposition, ion exchange, and electrochemical technique (5). The use of any of these methods depends on a variety of factors such as wastewater status, type and concentration of heavy metals, the amount of treatment required, but most importantly, the constraints such as the cost of the devices required and the high cost of executive operations and treatment of toxic sludge (6). Therefore, due to the problems mentioned, it is necessary to introduce novel methods, such as metal nano-adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Removal of Lead (Pb) From Aqueous Solutions Using Lignocellulose Nanofiber

Rastegar

Reaei

Yousefi

2021

Avicenna J Environ Health Eng

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The objective of this study was to investigate the removal of lead from aqueous solutions using Lignin-containing cellulose (LCNF) as natural adsorbent and advanced material in the batch system. The water sources contaminated with heavy metals, such as lead, have now become one of the major issues in the world due to non-degradability and huge adverse effects on the health of living organisms. X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM) were used to analyze the physical, chemical, and structural properties of LCNFs. The parameters measured in the batch system included pH (4-9), adsorbent dosage (0.1-1 g), contact time (15-120 minutes), initial lead concentration (10-50 mg/L), and temperature (15-40°C). The data for each treatment were statistically studied by analysis of variance (ANOVA) and Duncan's test. Based on the results, the optimal parameters were determined to be initial lead concentration of 10 mg/L, pH of 6, and adsorbent dosage of 0.3 g/L. The highest lead removal efficiency was achieved at 25°C. The system reached equilibrium at 60 minutes, and then there was little change in lead removal. The results of this study showed that LCNF, by removing more than 99% of lead from aqueous solutions, is a suitable adsorbent for removing lead from aqueous solutions.

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“…Modified PAN micro/nanofibers can be regenerated and be reused in other cycles after adsorption (Neghlani et al 2011;Horzum et al 2012). Hong et al (2015) successfully fabricated aminated PAN nanofibers, which had a maximum uptake capacity 1,520 mg/g for Pb(II), and retained over 90% of their extraction capacity after six adsorption-desorption cycles. Ndayambaje et al (2016) used PAN imidazoleligand nanofibers to adsorb Ni(II) in aqueous solution, and equilibrium uptake of Ni(II) at pH 3 and pH 5 was 0.3 and 0.7 mol/kg respectively, at a Ni(II) concentration of 0.0025 mol/L.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Competitive adsorption and mechanism of hexahydroxy metallic system by aminated solution-blown polyacrylonitrile micro/nanofibers

Lou

Feng

et al. 2021

Water Practice and Technology

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Adsorptive properties for Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) onto an amidoxime-functionalized polyacrylonitrile (APAN) micro/nanofibers were systematically investigated in hexahydroxy metallic solution system using batch experiments. The interactive effect of multi-metal ions in multi- metal systems was antagonistic in nature, and the adsorption capacity in multi-metal system was lower than that in single-metal system. The Langmuir isotherm model could explain respectively the isotherm and kinetic experimental data for hexahydroxy metallic system with much satisfaction. The maximum adsorption capacity in hexahydroxy metallic for Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) was calculated to be 98 mg/L, 158 mg/L, 80 mg/L, 76, 312 and 58 mg/L individually. The APAN micro/nanofibers possessed good selectivity toward Pb(II) and Cr(III), over Cd(II), Cu(II), Ni(II), and Zn(II), having the highest selectivity coefficients at 17.52 and 6.07 in the test range. The five adsorption-desorption cycle experiments exhibited that APAN micro/nanofibers adsorbent are readily reusable, and have potential for heavy metal removal from wastewater. The adsorption behavior in multi-metal systems was shown to be complex, including surface complexation, antagonistic competition and displacement reactions. The diversity and selectivity in metal ion adsorption onto the micro/nanofibers relate mainly to the stability constants, and the microscopic coupling mechanism between the heavy metal ions and the functional groups on the fiber surface. This interaction mechanism between the favorable component and other metal ions could contribute significantly to the direct displacement impact illustrated schematically.

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High recovery of lead ions from aminated polyacrylonitrile nanofibrous affinity membranes with micro/nano structure

Cited by 85 publications

References 35 publications

Polyacrylonitrile-based fiber modified with thiosemicarbazide by microwave irradiation and its adsorption behavior for Cd(II) and Pb(II)

Polyacrylonitrile-based fiber modified with thiosemicarbazide by microwave irradiation and its adsorption behavior for Cd(II) and Pb(II)

Removal of Lead (Pb) From Aqueous Solutions Using Lignocellulose Nanofiber

Competitive adsorption and mechanism of hexahydroxy metallic system by aminated solution-blown polyacrylonitrile micro/nanofibers

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