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金属矿山 ›› 2012, Vol. 41 ›› Issue (03): 145-148+162.

• 安全与环保 • 上一篇    下一篇

改性木屑对镉铬混合离子的吸附研究

胡伊旭1,2,3,夏璐1,2,3,金帅1,2,3,张博涵1,2,3,王磊1,2,3   

  1. 1.广西民族大学化学与生态工程学院;2.广西林产品开发与应用重点实验室;3.化学与生物转化工程新技术广西高校重点实验室
  • 出版日期:2012-03-27 发布日期:2012-04-18
  • 基金资助:

    * 国家自然科学基金项目(编号:41061044),广西自然科学基金重点项目(编号:2010GXNSFD013016),广西民族大学研究生教育创新计划项目(编号:gxun-chx2011091)。

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

摘要: 以木屑为原料,经环氧氯丙烷交联,通过与丙烯酰胺接枝,制备出木屑丙烯酰胺接枝黄原酸盐(SCX-g-AM)。用SCX-g-AM处理Cd2+和Cr3+的混合模拟废水,在Cd2+和Cr3+浓度均为10 mg/L时,其最适宜的吸附条件为投加量3.33 g/L、pH=7、温度25 ℃、吸附时间30 min,此时Cd2+和Cr3+的去除率均达95%以上。试验结果能很好地符合准二级动力学模型。

关键词: 木屑丙烯酰胺接枝黄原酸盐, 混合离子, 吸附

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