Journal
CARBOHYDRATE POLYMERS
Volume 80, Issue 2, Pages 436-441Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2009.11.046
Keywords
Konjac; Acrylamide; Flocculation; Heavy metal removal; Xanthation
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Funding
- National Natural Science Foundation of China [30972044]
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A novel functionalized polymeric flocculant on the basis of Konjac-graft-poly (acrylamide)-co-sodium xanthate was synthesized via copolymerization reaction of crosslinked Konjac glucomannan, acrylamide (AM), and sodium xanthate using epichlorohydrin (ECH) as cross-linker and ceric ammonium nitrate (CAN) as initiator in aqueous solution. The optimal synthesis conditions were as follows: KGM = 3 g, [ECM] = 4.9 x 10(-3) mol/L at 35 degrees C for 2 h, then [CAN] = 4.0 x 10(-3) mol/L, and the weight ratio of KGM and AM was 1:3 at 45 degrees C for 2.5 h, and then [NaOH] = 0.1 mol/L, [CS2]= 59 x 10(-3) mol/L at 30 degrees C for 2 h. The copolymer was characterized by FTIR, DSC and Elemental analysis. Flocculation test shows that in some extent, the cations, pH value, and turbidity are favorable for the removal of Cu2+ ions, but an excess dosage lead to an unobvious effect, and some anions express a negative effect on the Cu2+ removal. There exists the cooperation between Cu2+ ions and turbidity in the removal performance. (c) 2009 Elsevier Ltd. All rights reserved.
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