title: Surface functionalized composite nanofibers for efficient removal of arsenic from aqueous solutions.
abstract: A novel composites nanofiber was synthesized based on PAN-CNT/TiO2-NH2nanofibers using electrospinning technique followed by chemical modification of TiO2NPs. PAN-CNT/TiO2-NH2nanofiber were characterized by XRD, FTIR, SEM, and TEM. The effects of various experimental parameters such as initial concentration, contact time, and solution pH on As removal were investigated. The maximum adsorption capacity at pH 2 for As(III) and As(V) is 251 mg/g and 249 mg/g, respectively, which is much higher than most of the reported adsorbents. The adsorption equilibrium reached within 20 and 60 min as the initial solution concentration increased from 10 to 100 mg/L, and the data fitted well using the linear and nonlinear pseudo first and second order model. Isotherm data fitted well to the linear and nonlinear Langmuir, Freundlich, and Redlich-Peterson isotherm adsorption model. Desorption results showed that the adsorption capacity can remain up to 70% after 5 times usage. This work provides a simple and an efficient method for removing arsenic from aqueous solution.
authors.affiliation: Department of Materials and Nano Physics, KTH-Royal Institute of Technology, SE 16440 Stockholm, Sweden; Egypt Nanotechnology Center, EGNC, Cairo University, 12613 Giza, Egypt; Production Engineering and Printing Technology Department, Akhbar El Yom Academy, 12655 Giza, Egypt. Electronic address: alakha@kth.se.
authors.forename: Alaa
authors.initials: A
authors.lastname: Mohamed
authors.affiliation: Mechanical Design and Production Engineering Department, Cairo University, 12613 Giza, Egypt.
authors.forename: T A
authors.initials: TA
authors.lastname: Osman
authors.affiliation: Department of Materials and Nano Physics, KTH-Royal Institute of Technology, SE 16440 Stockholm, Sweden.
authors.forename: M S
authors.initials: MS
authors.lastname: Toprak
authors.affiliation: Department of Materials and Nano Physics, KTH-Royal Institute of Technology, SE 16440 Stockholm, Sweden; Material Science Department, Alexandria University, 11559 Alexandria, Egypt.
authors.forename: M
authors.initials: M
authors.lastname: Muhammed
authors.affiliation: Department of Materials and Nano Physics, KTH-Royal Institute of Technology, SE 16440 Stockholm, Sweden. Electronic address: salam@kth.se.
authors.forename: A
authors.initials: A
authors.lastname: Uheida
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D057139:Nanofibers / Q000737:chemistry*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Arsenic adsorption; Composite nanofibers; Electrospinning; Isotherm; Kinetics