title: Highly efficient chromium(VI) adsorption with nanofibrous filter paper prepared through electrospinning chitosan/polymethylmethacrylate composite.
abstract: Chitosan/polymethylmethacrylate (PMMA) composite nanofibrous membrane was prepared by electrospinning technique with a single solvent system. Characterization with Fourier transformation infrared spectroscopy (FT-IR) indicated that there was weak interaction (such as hydrogen bonds) between PMMA and chitosan. Scanning electron microscopy (SEM) measurements illustrated that the average diameter of the composite nanofibers decreased as the chitosan content was increased, while the number of nano/micrometer sized beads increased in the membrane. The composite nanofibrous membrane with chitosan:PMMA ratio of 0.3:1.0 exhibited a maximum adsorption capacity (67.0 mg g(-1)) of Cr(VI) in static adsorption, which was nearly three times higher than that of chitosan powder (22.9 mg g(-1)). The adsorption capacity of Cr(VI) via filtration became even higher, where the maximum value was 92.5 mg g(-1) at pH 3.0. Notably, most of Cr(VI) has been removed after the first filtration at all pH values (2.0-6.0) investigated in this report. The adsorption capacity of the composite nanofibrous membrane decreased slightly (17.1%) after three filtration cycles even with the solution of pH 2.0, which shall be attributed to the enhanced mechanical strength and acid fastness of the composite membrane. X-ray photoelectron spectroscopy (XPS) analysis indicated that amino groups played an important role in the adsorption of Cr(VI).
authors.affiliation: College of Material Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063009, China.
authors.forename: Zhengyang
authors.initials: Z
authors.lastname: Li
authors.affiliation: College of Material Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063009, China. Electronic address: litingting2046@163.com.
authors.forename: Tingting
authors.initials: T
authors.lastname: Li
authors.affiliation: College of Machnical Engineering, North China University of Science and Technology, Tangshan 063009, China.
authors.forename: Libao
authors.initials: L
authors.lastname: An
authors.affiliation: College of Material Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063009, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Fu
authors.affiliation: College of Material Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063009, China.
authors.forename: Cangjian
authors.initials: C
authors.lastname: Gao
authors.affiliation: College of Material Science and Engineering, North China University of Science and Technology, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, Tangshan 063009, China. Electronic address: zhangzhiming1942@163.com.
authors.forename: Zhiming
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D005374:Filtration; D057139:Nanofibers / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*
chemical_list: D002857:Chromium; C074702:chromium hexavalent ion; D019904:Polymethyl Methacrylate; D048271:Chitosan
keywords: Chitosan; Cr(VI) adsorption; Electrospinning; Filter paper; Polymethylmethacrylate