Adsorption properties and mechanism of Pb(Ⅱ) adsorbed by graphene oxide/sodium alginate composite membrane

被引：0
|
作者：
Wang L. [1 ]
Bai C. [1 ]
Zhu Z. [2 ]
机构：
[1] Key Laboratory of Membrane Separation of Shaanxi Province, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Province Key Laboratory of Sustained Utilization and Development of Water Resources, School of Water Resources and Environment, Hebei GEO University, Shijiazhuang
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 03期
关键词：
Adsorption mechanism; Composite membrane; Graphene oxide (GO); Pb(Ⅱ); Sodium alginate (SA);
D O I：
10.13801/j.cnki.fhclxb.20190719.002
中图分类号：
学科分类号：
摘要：
The sodium alginate (SA)-based filtration membrane is an ideal membrane separation material for wastewater containing Pb(Ⅱ). It is very valuable but lacking to study the effect of adsorption behavior on membrane filtration. The graphene oxide (GO) and urea were added into SA and crosslinked with CaCl2 solution to prepare GO/SA composite membrane to investigate its adsorption performance for Pb(Ⅱ) in aqueous solution. The effects of Pb(Ⅱ) initial concentration, GO mass fraction, initial pH value, adsorption time, adsorption-desorption times and other conditions on the adsorption effect were investigated by static adsorption experiments. The adsorption kinetics and adsorption thermodynamics analysis were also carried out on the adsorption process. The adsorption mechanism of Pb(Ⅱ) on GO/SA composite membrane was analyzed by FTIR-ATR and XPS. The experimental results show that the adsorption amount of Pb(Ⅱ) is positively correlated with the initial concentration of Pb(Ⅱ), the adsorption effect is optimal at pH=5, and GO mass fraction of 0.3wt% is the optimal ratio; the adsorption process conforms to the pseudo second-order kinetic model; The thermodynamic isotherm adsorption process accords with the Langmuir isotherm adsorption model. At temperature of 318 K, the adsorption capacity of GO/SA composite membrane obtained by the Langmuir model is 320.51 mg•g-1. The adsorption mechanism of GO/SA alginate composite membrane on Pb(Ⅱ) is mainly physical adsorption. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：681 / 689
页数：8
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共 20 条
  • [1] Vijayalakshmi K., Gomathi T., Latha S., Et al., Removal of copper(Ⅱ) from aqueous solution using nanochitosan/sodium alginate/microcrystalline cellulose beads, International Journal of Biological Macromolecules, 82, pp. 440-452, (2016)
  • [2] Fu F., Wang Q., Removal of heavy metal ions from wastewaters: A review, Journal of Environmental Management, 92, 3, pp. 407-418, (2011)
  • [3] Zeng J., Yang L.Y., Chuai X.M., Et al., Comparison of metal(loid) concentrations in water, sediments and fish from two large shallow lakes, International Journal of Environmental Science & Technology, 10, 6, pp. 1209-1218, (2013)
  • [4] Wang J., Liu M., Duan C., Et al., Preparation and characterization of cellulose-based adsorbent and its application in heavy metal ions removal, Carbohydrate Polymers, 206, pp. 837-843, (2019)
  • [5] Qi Y.W., Zhu L.F., Shen X., Et al., Polythyleneimine-modified original positive charged nanofiltration membrane: Removal of heavy metal ions and dyes, Separation and Purification Technology, 222, pp. 117-124, (2019)
  • [6] Alipour H., Pourkhabbaz A., Hassanpour M., Assessing of heavy metal concentrations in the tissues of Rutilus rutilus caspicus and Neogobius gorlap from Miankaleh international wetland, Bulletin of Environmental Contamination and Toxicology, 91, 5, pp. 517-521, (2013)
  • [7] Luo X.B., Wang C.C., Wang L.C., Et al., Nanocomposites of graphene oxide-hydrated zirconium oxide for simultaneous removal of As(Ⅲ) and As(Ⅴ) from water, Chemical Engineering Journal, 220, pp. 98-106, (2013)
  • [8] Zhang H.F., Dang Q.F., Liu C.S., Et al., Fabrication of methyl acrylate and tetraethylenepentamine grafted magnetic chitosan microparticles for capture of Cd(Ⅱ) from aqueous solutions, Journal of Hazardous Materials, 366, pp. 346-357, (2019)
  • [9] Weng X.L., Wu J., Ma L., Et al., Impact of synthesis conditions on Pb(Ⅱ) removal efficiency from aqueous solution by green tea extract reduced graphene oxide, Chemical Engineering Journal, 359, pp. 976-981, (2019)
  • [10] Sajjadia S.A., Meknatia A., Limab E.C., Et al., A novel route for preparation of chemically activated carbon from pistachio wood for highly efcient Pb(Ⅱ) sorption, Journal of Environmental Management, 236, pp. 34-44, (2019)
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