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Metal Mine ›› 2012, Vol. 41 ›› Issue (03): 145-148+162.

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Adsorption of Cd2+ and Cr3+ from Aqueous Mixed Metal Solutions by Modified Sawdust

Hu Yixu1,2,3，Xia Lu1,2,3，Jin Shuai1,2,3，Zhang Bohan1,2,3，Wang Lei1,2,3   

  1. 1.Guangxi University for Nationalities，College of Chemistry and Ecological Engineering；2.Key Laboratory of Development & Application of Forest Production of Guangxi；3.Key Laboratory of Chemical and Biological Transforming Process of Guangxi Universities
  • Online:2012-03-27 Published:2012-04-18

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Abstract: A novel crosslinked cellulose-graft-polyacrylamide-co-magnesium xanthate（SCX-g-AM）was synthesized by grafting copolymerization reaction of cellulose，acrylamide，and xanthogenate using epichlorohydrin as crosslinking reagent in aqueous sodium hydroxide. The present study proposed the use of SCX-g-AM in the removal of Cd2+ and Cr3+（initial concentration =10 mg/L）from aqueous mixed metal solutions. Batch adsorption studies ware determined the optimum adsorption conditions: adsorbent dosage is 3.33 g/L，pH value is 7，temperature is 25 ℃ and contact time is 30 min. Under these conditions, the removal of Cd2+ ahd Cr3+ get to above 95%.The results are in line with the normal scond-order kineties model.

Key words: SCX-g-AM, Mixed metal ions, Adsorption, Kinetic