| 腐殖酸与Cu2+、Zn2+、Fe3+的络合作用 |
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| 引用本文： | 杨春文.腐殖酸与Cu2+、Zn2+、Fe3+的络合作用[J].甘肃联合大学学报(自然科学版),2004,18(3):45-48. |
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| 作者姓名： | 杨春文 |
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| 作者单位： | 甘肃联合大学,理工学院,甘肃,兰州,730000 |
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| 摘 要： | 用电位滴定法研究了腐殖酸与Cu^2 、Zn^2 、Fe^3 的络合作用．它们的络合形成常数可通过作图法获得．随着溶液中金属离子浓度的增大，络合形成常数减小．同时发现络合形成常数FA大于HA；Cu^2 和Fe^3 大于Zn^2 ．
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| 关 键 词： | 腐殖酸 络合作用 电位滴定 金属离子 弱酸性功能基团 聚合物 |
| 文章编号： | 1672-691X(2004)03-0045-04 |
| 修稿时间： | 2003年10月25 |
Complexation of Cu2+,Zn2+and Fe3+ Metal Ions with Humic |
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| YANG Chun-wen.Complexation of Cu2+,Zn2+and Fe3+ Metal Ions with Humic[J].Journal of Gansu Lianhe University :Natural Sciences,2004,18(3):45-48. |
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| Authors: | YANG Chun-wen |
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| Abstract: | The humic substances-fulvic acid(FA)and humic acid(HA) and their complexations with metal ions Cu~(2+),Zn~(2+)and Fe~(3+) were investigated by using potentiometric titration. The formation constants of the metal ion complexes with HA and FA were obtained by graphical approaches. It was found that formation constants decrease with the increasing concentration of metal in the solution.The formation constants of FA are larger than those of HA and the formation constants of Cu~(2+) and Fe~(3+) are larger than those of Zn~(2+). |
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| Keywords: | potentiometric titration humic and fulvic acids metal ion complexes |
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