东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (1): 53-56.DOI: -

• 论著 • 上一篇    下一篇

壳聚糖絮凝剂处理废水中的Ag~+

张廷安;豆志河;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-01-15 发布日期:2013-06-23
  • 通讯作者: Zhang, T.-A.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50174018)

Removal of Ag+ in wastewater with chitosan as flocculation

Zhang, Ting-An (1); Dou, Zhi-He (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-01-15 Published:2013-06-23
  • Contact: Zhang, T.-A.
  • About author:-
  • Supported by:
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摘要： 研究了利用壳聚糖絮凝剂絮凝除Ag的方法.考察了pH值、离子溶液浓度、絮凝剂用量以及絮凝时间对去除率的影响.实验结果表明:壳聚糖絮凝除银的适宜pH为7~8;当pH=7~8时,用壳聚糖吸附银离子,水样银质量浓度低于20 mg/L时,除银率达100%.即使高浓度含银水样,其除银率也在99.9%以上;絮凝除银时间4 h为宜,其去除率达99.98%;壳聚糖的加入量过多过少都会影响除银效果.分析了壳聚糖絮凝除银的机理.

关键词: Ag, 废水处理, 壳聚糖, 絮凝剂, 去除率

Abstract: The way to remove Ag+ from wastewater using chitosan as flocculant was investigated including the effects of pH value, ion concentration of Ag+, flocculant dose and flocculating time on removal rate. Experimental results indicated that the suitable pH value varies from 7 to 8 with which the removal rate of Ag+ is 100% if the mass concentration of Ag+ is less than 20 mg/L in water. And the removal rate will be over 99.9% even if the mass concentration of Ag+ is very high. The optimal flocculating time is 4h by which the removal rate of Ag+ will still be 99.98%; Overmuch or insufficient dose of chitosan will affect the removal of Ag. The flocculation mechanism of using chitosan to remove Ag+ was further analyzed.

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