title: Functionalized cotton via surface-initiated atom transfer radical polymerization for enhanced sorption of Cu(II) and Pb(II).
abstract: The surface-initiated atom transfer radical polymerization (ATRP) was used to successfully prepare the aminated cotton and polyacrylic acid sodium (P(AA-Na))-grafted cotton for the efficient removal of Cu(II) and Pb(II) from aqueous solution in this study. The modified cotton surfaces were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). The grafted long polymers with high density of amine and carboxyl groups on the cotton surfaces were responsible for the enhanced adsorption of heavy metals. The sorption behaviors including sorption kinetics, isotherms and pH effect were investigated. The sorption equilibrium of Cu(II) and Pb(II) was achieved within 1h on the P(AA-Na)-grafted cotton, much faster than 8h on the aminated cotton. According to the Langmuir fitting, the maximum sorption capacities of Cu(II) and Pb(II) on the P(AA-Na)-grafted cotton were 2.45 and 2.44 mmol/g, respectively, higher than many adsorbents reported in the literature. The P(AA-Na)-grafted cotton had better adsorption behaviors for Cu(II) and Pb(II) than the aminated cotton.
authors: State Key Laboratory of Chemical Resource Engineering, College of Materials Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
authors: Y Q
authors: YQ
authors: Zheng
authors: Shubo
authors: S
authors: Deng
authors: Li
authors: L
authors: Niu
authors: F J
authors: FJ
authors: Xu
authors: M Y
authors: MY
authors: Chai
authors: Gang
authors: G
authors: Yu
mesh_terms: D000327:Adsorption; D003300:Copper / Q000032:analysis*; D005609:Free Radicals; D003368:Gossypium / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000032:analysis*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008956:Models, Chemical; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013499:Surface Properties; D013997:Time Factors; D018508:Water Purification / Q000379:methods
chemical_list: D005609:Free Radicals; D011108:Polymers; D007854:Lead; D003300:Copper