Carbon-dot-modified polyacrylonitrile fiber as recyclable adsorbent for removing anionic, cationic, and zwitterionic perfluorooctane sulfonates from water

被引：2
作者：
Chen P.-Y. [1 ,2 ]
Wang B. [3 ]
Chen W.-G. [1 ]
Zhuang S. [2 ]
Chen Y. [1 ,3 ]
Liu H.-J. [1 ]
机构：
[1] Department of Chemistry, School of Science, Tianjin University, Tianjin
[2] Tianjin Fire Research Institute of MEM, Tianjin
[3] Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin
来源：
Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2022年 / 651卷
基金：
中国国家自然科学基金;
关键词：
Adsorption; Carbon dot; Perfluorooctane sulfonate; Polyacrylonitrile fiber;
D O I：
10.1016/j.colsurfa.2022.129763
中图分类号：
学科分类号：
摘要：
There are few adsorbents that can efficiently adsorb perfluorooctane sulfonate (PFOS) with differently polarized head-groups. In the present study, carbon dot (CD)-modified polyacrylonitrile fiber (PAN-g-CD) was found to be a good adsorbent for removing PFOS and its derivatives with zwitterionic or cationic head-groups from neutral water. The maximum adsorption capacities at 25 °C were found to be 1.28, 1.75, 1.87, and 2.11 mmol/g for PFOS, cationic PFOS, betaine-type PFOS, and PFOS with an amine oxide head-group, respectively. Adsorption kinetic models indicated that the surface of PAN-g-CD is energetically heterogeneous and that chemisorption occurs during the adsorption of PFOS and its derivatives. The Sips and Hill isotherm adsorption models were found to be most appropriate, and they indicated that PFOS derivatives were more preferentially adsorbed than PFOS by PAN-g-CD. The high-efficiency and wide substrate range of PAN-g-CD adsorption may be ascribed to its zwitterionic nature and its hydrophobic CDs. Moreover, PAN-g-CD can be regenerated and reused up to four times without pronounced loss of adsorption capacity. © 2022 Elsevier B.V.
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[1]  
Peshoria S., Nandini D., Tanwar R.K., Narang R., Short-chain and long-chain fluorosurfactants in firefighting foam: a review, Environ. Chem. Lett., 18, pp. 1277-1300, (2020)
[2]  
Moody C.A., Field J.A., Perfluorinated surfactants and the environmental implications of their use in fire-fighting foams, Environ. Sci. Technol., 34, pp. 3864-3870, (2000)
[3]  
Steinle-Darling E., Reinhard M., Nanofiltration for trace organic contaminan tremoval: structure, solution, and membrane fouling effects on the rejection of perfluorochemicals, Environ. Sci. Technol., 42, pp. 5292-5297, (2008)
[4]  
Liu Z., Lu Y., Wang P., Wang T., Liu S., Johnson A.C., Sweetman A.J., Baninla Y., Pollution pathways and release estimation of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in central and eastern china, Sci. Total Environ., 580, pp. 1247-1256, (2017)
[5]  
Hinnant K.M., Giles S.L., Smith E.P., Snow A.W., Ananth R., Characterizing the role of fluorocarbon and hydrocarbon surfactants in firefighting-foam formulations for fire-suppression, Fire Technol., 56, pp. 1413-1441, (2019)
[6]  
Sheng Y., Jiang N., Lu S., Li C., Fluorinated and fluorine-free firefighting foams spread on heptane surface, Colloids Surf. A, 552, pp. 1-8, (2018)
[7]  
Jia X., Luo Y., Huang R., Bo H., Liu Q., Zhu X., Spreading kinetics of fluorocarbon surfactants on several liquid fuels surfaces, Colloids Surf. A, 589, (2020)
[8]  
Backe W.J., Day T.C., Field J.A., Zwitterionic, cationic, and anionic fluorinated chemicals in aqueous film forming foam formulations and groundwater from U.S. Military bases by nonaqueous large-volume injection HPLC-MS/MS, Environ. Sci. Technol., 47, pp. 5226-5234, (2013)
[9]  
Zhi Y., Liu J., Sorption and desorption of anionic, cationic and zwitterionic polyfluoroalkyl substances by soil organic matter and pyrogenic carbonaceous materials, Chem. Eng. J., 346, pp. 682-691, (2018)
[10]  
Munoz G., Duy S.V., Labadie P., Botta F., Budzinski H., Lestremau F., Liu J., Sauve S., Analysis of zwitterionic, cationic, and anionic poly- and perfluoroalkyl surfactants in sediments by liquid chromatography polarity-switching electrospray ionization coupled to high resolution mass spectrometry, Talanta, 152, pp. 447-456, (2016)
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