title: [Adsorption behaviors of chitosan and the analysis of FTIR spectra].
abstract: This paper studied the adsorption behavior of lab-made chitosan for acid dyeing waste water and basic dyeing waste waters, based on the effects of adsorbing time, deacetylation degree of chitosan, and pH of waste water. The results showed that the adsorption of basic fuchsin and saffron by the chitosan almost reached equilibrium state in 20 min. The adsorption capacities of the chitosan for dyes was comparable with activated carbon. Moreover, its dosages were only 2/3 of the latter. The adsorption process for Acid Red presented a dynamics character of first order reaction. FTIR spectroscopy was used to analyze the adsorption mechanisms of chitosan for different kinds of dyes. It was found that a great deal of hydroxide radicals in the chitosan molecule participated in the adsorption of basic fuchsin and saffron.
authors.affiliation: College of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210014, China.
authors.forename: Zhong-Hua
authors.initials: ZH
authors.lastname: Huang
authors.forename: Xiu-Yun
authors.initials: XY
authors.lastname: Sun
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Ge
authors.forename: Jun-De
authors.initials: JD
authors.lastname: Wang
mesh_terms: D000107:Acetylation; D000327:Adsorption; D048271:Chitosan / Q000737:chemistry* / Q000493:pharmacokinetics; D004396:Coloring Agents / Q000737:chemistry*; D027622:Crocus / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry; D007700:Kinetics; D012394:Rosaniline Dyes / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D006878:Hydroxides; D012394:Rosaniline Dyes; D014874:Water Pollutants, Chemical; C025485:basic fuchsin; D048271:Chitosan; C031356:hydroxide ion