东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (7): 1036-1040.DOI: -

• 论著 • 上一篇    下一篇

氨基磺酸铵-细菌纤维素对Pb~(2+)的吸附性能及机理

鲁敏;关晓辉;魏德洲;李彦英;   

  1. 东北大学资源与土木工程学院;东北电力大学化学工程学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174014);;

Adsorption property and mechanism of ammonium sulfamate-bacterial cellulose to Pb2+

Lu, Min (1); Guan, Xiao-Hui (2); Wei, De-Zhou (1); Li, Yan-Ying (2)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; (2) School of Chemical Engineering, Northeast Dianli University, Jilin 132012, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Lu, M.
  • About author:-
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摘要： 为了提高细菌纤维素(BC)对重金属离子的吸附性能,以细菌纤维素为原料通过化学修饰的方法对其进行改性,制备了新型的重金属离子吸附剂氨基磺酸铵-细菌纤维素(ASBC).同时将制得的ASBC用于吸附重金属Pb2+,考察了其对Pb2+吸附性能,并对吸附机理进行了初步研究.结果表明:pH值是影响氨基磺酸铵-细菌纤维素对Pb2+吸附效果的重要参数,对Pb2+的吸附符合二级反应动力学特征和Langmuir吸附等温方程,并具有良好的线性,说明ASBC对Pb2+是典型的单分子层吸附;静电吸引和螯合作用是吸附的主要机理之一.

关键词: 氨基磺酸铵-细菌纤维素, 细菌纤维素, 吸附性能, 吸附机理, Pb2+

Abstract: The new adsorbent of ammonium sulfamate-bacterial cellulose (ASBC) was prepared through chemical modification of bacterial cellulose. ASBC was used for removing Pb2+ in order to study the adsorption property and mechanism of ASBC. The results showed that pH is a very important parameter to the adsorbed efficiency. The adsorption rate can be well fitted by pseudo-second rate model, the adsorption isotherm can be described by Langmuir model and they have good linear relationship. Typical single-molecule layer adsorption of ASBC for Pb2+ can be described. And the electrostatic attraction and chelating effect are one of main mechanisms of adsorption.

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