%0 Journal Article
%T Research on the Graft Copolymerization of EH-lignin with acrylamide
%A Run Fang
%A Xian-Su Cheng
%A Jian Fu
%A Zuan-Bin Zheng
%J Natural Science
%P 17-22
%@ 2150-4105
%D 2009
%I Scientific Research Publishing
%R 10.4236/ns.2009.11004
%X Lignin isolated from enzymatic hydrolyzed corn-stalks (EH-lignin) is a renewable natural polymer noted for its versatility and applicability in a vari-ety of uses. Graft copolymerization of EH-lignin with acrylamide (AM) and the application of this copolymer as a flocculant in dye wastewater treatment were studied in this article. The influ-ences of some factors on yield of copolymer and the grafting ratio were investigated and the structure of EH-lignin/AM graft copolymer was characterized by FT-IR. According to the yield and the grafting ratio, the optimum conditions for graft copolymerization were as follows: initiator K2S2O8-Na2S2O3 with a quantity 3 wt% of EH-lignin, mass ratio of AM to EH-lignin was 2~3, reaction time 4h and temperature at 50¡æ. It was found that the absorption capacity of graft copolymer to two azo-dyes was enhanced with the increase of grafting ratio. Furthermore, the residue concen-tration of EH-lignin/AM graft copolymer remained in the supernatant after flocculation was much lower than that of pure EH-lignin.
%K Lignin
%K Acrylamide
%K Graft Copolymerization
%K Dye Wastewater
%K Decoloration
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=499