title: Effect of chemical and biological degumming on the adsorption of heavy metal by cellulose xanthogenates prepared from Eichhornia crassipes.
abstract: Cellulose xanthogenates, derived from the straw of Eichhornia crassipes, were prepared as adsorbents for heavy metals by CS(2) sulfonation and magnesium substitution after degumming with alkali, self-isolated A(1) strain and pectase, respectively. The effects of three degumming treatments were compared by functional groups analysis, surface morphology and surface element composition and heavy metal (Pb(2+)) adsorption studies. The results demonstrate that bio-degumming treatments by A(1) strain and pectase have weaker degumming effects than alkali treatment. However, the surface characteristics of the bio-degumming products, especially the pectase degumming product, are more beneficial to heavy metal adsorption. In comparison to that of the raw plant materials, the Pb(2+) adsorption performances of the three xanthogenates improved significantly, although no obvious differences being observed among themselves. From an environmental point of view, the two bio-degumming treatments, especially the pectase degumming treatment, are more beneficial to prepare heavy metal adsorbents than the alkali degumming treatment.
authors.affiliation: Laboratory of Plant Nutrition and Ecological Environment Research, Microelement Research Center of Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Li
authors.initials: L
authors.lastname: Deng
authors.forename: Mingjian
authors.initials: M
authors.lastname: Geng
authors.forename: Duanwei
authors.initials: D
authors.lastname: Zhu
authors.forename: Wenbing
authors.initials: W
authors.lastname: Zhou
authors.forename: Alan
authors.initials: A
authors.lastname: Langdon
authors.forename: Hongwei
authors.initials: H
authors.lastname: Wu
authors.forename: Yun
authors.initials: Y
authors.lastname: Yu
authors.forename: Zhenxiang
authors.initials: Z
authors.lastname: Zhu
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D031806:Eichhornia / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014970:Xanthines / Q000737:chemistry*
chemical_list: D019216:Metals, Heavy; D014970:Xanthines; C528876:cellulose xanthate; D002482:Cellulose