ZHANG Xiaoye, SUN Heyu, HE Yang, LI Jianjian, FENG Xia, ZHAO Yiping, CHEN Li
State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
Abstract: The hyperbranched polyamidoamine (PAMAM) have a large number of amine-terminated groups and amide groups, which can adsorb heavy metal ions by coordination, and further increase the adsorption capacity by increasing the number of generation. In this work, the different generation of PAMAM were added to a casting solution of polyvinylidene fluoride (PVDF) by blending, and PVDF/PAMAM membranes having an adsorption capacity for removing copper ions were prepared by immersion precipitation phase inversion. The structure and morphology of the membranes were characterized by infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (SEM) and atomic force microscopy (AFM). Static contact angle and pure water flux were studied, and the results found that the pure water flux of PVDF/G4.0 PAMAM membranes were increased from 64.86 L/(m2·h) of PVDF membranes to 424.00 L/(m2·h), and the hydrophilicity of membranes were improved. Static adsorption experiments showed that the adsorption capacity of copper ions by PVDF/PAMAM membrane increased to 22.65 mg/g compared to PVDF membranes, which was 7.70 times higher than that of PVDF membrane. By adsorption isotherm analysis, the PVDF/PAMAM membrane can continuously adsorb copper ions, and continue to adsorb at 550 min. The adsorption kinetics accorded with the quasi-secondary kinetic model and belonged to chemical adsorption. The PVDF blend PAMAM membrane broadened the application of PVDF membrane in the field of adsorption of heavy metals.
1 Al-Rashdi B, Somerfield C, Hilal N. Separation & Purification Reviews, 2011, 40(3), 209. 2 Son E B, Poo K M, Chang J S, et al. Science of the Total Environment, 2018, 615, 161. 3 Fu F, Wang Q. Journal of Environmental Management, 2011, 92(3), 407. 4 Xing D Y, Chen G K, Wang K M, et al. Acta Materiae Compositae Sinica, 2017, 34(10),2271(in Chinese). 邢涤扬, 陈广凯, 王克敏, 等.复合材料学报, 2017, 34(10), 2271. 5 Adeleye A S, Conway J R, Garner K, et al. Chemical Engineering Journal, 2016, 286, 640. 6 Camarillo R, Pérez A, Canizares P, et al. Desalination, 2012, 286, 193. 7 Crini G. Bioresource Technology, 2006, 97(9), 1061. 8 Zhu Z Y, Wang L, Jiang J L, et al. Acta Materiae Compositae Sinica, 2018, 35(4),785(in Chinese). 朱振亚,王磊,姜家良,等. 复合材料学报,2018,35(4),785. 9 Li T, Zhang W, Zhai S, et al. Water Research, 2018,143,87. 10 Bu J, Li R, Quah C W, et al. Macromolecules, 2004, 37(18), 6687. 11 Cao J S, Wang C, Fang F, et al. Environmental Pollution, 2016, 219, 924. 12 Zhu J, Yang J, Deng B. Journal of Hazardous Materials, 2009, 166(2-3), 866. 13 Yantasee W, Lin Y, Fryxell G E, et al. Industrial & Engineering Che-mistry Research, 2004, 43(11), 2759. 14 Zhu W P, Gao J, Sun S P, et al. Journal of Membrane Science, 2015, 487,117. 15 Zhang J, Zhang D, Zhang A, et al. Iranian Polymer Journal, 2013, 22(7), 501. 16 Li G, Shen L, Luo Y, et al. Desalination, 2014, 338, 115. 17 Zhou S, Xue A, Zhang Y, et al. Applied Clay Science, 2015, 107, 220. 18 Kotte M R, Kuvarega A T, Cho M, et al. Environmental Science & Technology, 2015, 49(16), 9431. 19 Barakat M A, Schmidt E. Desalination, 2010, 256(1-3), 90.
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2020, Vol. 34 
