| 腐殖质与Ca~(2+)、Mg~(2+)、Co~(2+)、Ni~(2+)的络合作用及其在农业中的应用 |
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| 引用本文： | 杨春文.腐殖质与Ca~(2+)、Mg~(2+)、Co~(2+)、Ni~(2+)的络合作用及其在农业中的应用[J].西北民族学院学报,2003,24(3):67-73. |
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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 甘肃兰州730000 |
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| 摘 要： | 用电位滴定法研究腐殖酸FA和HA与金属离子(Ca2+、Mg2+、Co2+、Ni2+)的络合作用,发现它们与金属离子形成的络合物比较稳定,在溶液中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FA与金属离子的络合形成常数比HA的大 腐殖酸是土壤肥力高低的一个重要标志,在农业应用中具有重要作用
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| 关 键 词： | 电位滴定 腐殖酸 金属离子 络合作用 |
| 文章编号： | 1009-2102(2003)03-0067-07 |
| 修稿时间： | 2003年5月25日 |
Complexation of Ca2 + 、 Mg2 + 、 Co2 +and Ni2 + with Humic Substance and Its Application in Agriculture |
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| YANG Chun-wen.Complexation of Ca2 + 、 Mg2 + 、 Co2 +and Ni2 + with Humic Substance and Its Application in Agriculture[J].Journal of Northwest Minorities University(Natural Science ),2003,24(3):67-73. |
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| Authors: | YANG Chun-wen |
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| Abstract: | Gansu Black Soil, the humic substancesfulvic acid(FAs)and humic acid(HAs) and their complexations with Ca2+?Mg2+?Co2+and Ni2+ were investigated by using potentiometric titration. The formation constants of the metal ion complexes with HAs and FAs were obtained by graphical approaches respectively. It was found that formation constants decreases 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 Co2+ and Ni2+ are larger than those of Ca2+ and Mg2+.The Application of humic substances in agriculture was discussed. It is one important symbol of the fertility of soil. |
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| Keywords: | potentiometric titration humic and fulvic acids metal ion complexes |
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