title: Biocomposite fiber of calcium alginate/multi-walled carbon nanotubes with enhanced adsorption properties for ionic dyes.
abstract: A bioadsorbent of calcium alginate/multi-walled carbon nanotubes (CA/MWCNTs) composite fiber was fabricated by wet spinning and was characterized. Adsorptions of methylene blue (MB) and methyl orange (MO) ionic dyes onto CA/MWCNT composite fibers were investigated with different MWCNTs content and pH values. The results showed that introduction of MWCNTs of CA/MWCNTs composite fiber could not only sharply increase the adsorption capacity of MO onto bioadsorbent by 3 times, but enhanced the adsorption rate for MB compared to that of native CA fiber. Adsorption kinetics was determined by fitting pseudo-first, second-order and the intra-particle diffusion models to the experimental data, with the second-order model providing the best description of MB and MO adsorption onto CA/MWCNT fibers. The equilibrium adsorption data were analyzed by two widely applied isotherms: Langmuir and Freundlich. The desorption experiments showed the percentage of desorption were found to be 79.7% and 80.2% for MB and MO, respectively.
authors.affiliation: State Key Laboratory Cultivating Base for New Fiber Materials and Modern Textiles, Department of Polymer Science and Engineering, Qingdao University, Qingdao 266071, PR China.
authors.forename: Kunyan
authors.initials: K
authors.lastname: Sui
authors.forename: Yujin
authors.initials: Y
authors.lastname: Li
authors.forename: Rongzhan
authors.initials: R
authors.lastname: Liu
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.forename: Hongchao
authors.initials: H
authors.lastname: Liang
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Xia
mesh_terms: D000327:Adsorption; D000464:Alginates / Q000737:chemistry* / Q000378:metabolism; D004396:Coloring Agents / Q000737:chemistry* / Q000378:metabolism; D020723:Glucuronic Acid / Q000737:chemistry / Q000378:metabolism; D006603:Hexuronic Acids / Q000737:chemistry / Q000378:metabolism; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*
chemical_list: D000464:Alginates; D004396:Coloring Agents; D006603:Hexuronic Acids; D037742:Nanotubes, Carbon; D020723:Glucuronic Acid