应用化学 ›› 2009, Vol. 26 ›› Issue (10): 1154-1158.

• 研究论文 • 上一篇    下一篇

聚(丙烯酸-co-丙烯酰胺)/蒙脱土/腐殖酸钠复合物对Pb2+的吸附性能

郑易安,王爱勤   

  1. (中国科学院兰州化学物理研究所 兰州 730000)
  • 收稿日期:2008-10-27 修回日期:2009-01-13 出版日期:2009-10-10 发布日期:2009-10-10
  • 通讯作者: 王爱勤,男,博士,研究员,博士生导师; E-mail:aqwang@lzb.ac.cn; 研究方向:环境材料
  • 基金资助:
    江苏省科技厅太湖专项(BS2007118)甘肃省科技支撑(0804GKCA03A)资助项目

Adsorption of Pb2+ onto Poly (acrylic acid-co-acrylamide) /Montmorillonite/ Sodium Humate Composite

 ZHENG Yi-An, WANG Ai-Qi   

  1. (Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000)
  • Received:2008-10-27 Revised:2009-01-13 Published:2009-10-10 Online:2009-10-10

摘要:

用制备的聚(丙烯酸-co-丙烯酰胺)/蒙脱土/腐殖酸钠复合吸附剂,研究了溶液pH值、吸附时间和Pb2+溶液初始浓度等因素对重金属Pb2+的吸附性能,探讨了复合吸附剂对Pb2+的吸附机理。结果表明,在pH值为6.0、吸附时间2 h、Pb2+溶液初始浓度0.01 mol/L和吸附剂用量0.10 g的条件下,复合吸附剂对Pb2+的吸附量达到364.05 mg/g,平衡所需的时间为15 min。与蒙脱土相比,复合吸附剂具有更高的吸附容量和更快的吸附速率。

关键词: 复合吸附剂, 蒙脱土, 铅, 吸附容量, 吸附机理

Abstract:

A composite adsorbent based on acrylic acid, acrylamide, montmorillonite and sodium humate was prepared in this work and then the effects of pH values, contact time, and initial Pb2+concentration on removing Pb2+ from the aqueous solution were evaluated. The adsorption mechanism for Pb2+ onto as-prepared adsorbent was discussed. The results indicated that under the conditions of pH 6.00, contact time of 2 h, initial Pb2+ concentration of 0.01 mol/L and amount of adsorbent of 0.10 g, the adsorption capacity of as-prepared adsorbent for Pb2+ was found to be 364.05 mg/g and the adsorption system reached equilibrium within 15 min. Compared with Ca-montmorillonite and other adsorbents reported, as-prepared composite adsorbent has higher adsorption capacity and faster adsorption rate.

Key words: composite adsorbent, montmorillonite, lead, adsorption capacity, adsorption mechanism

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