| 几种电解质对土壤吸附Cu2+的影响 |
| |
| 引用本文： | 李瑛,李洪军,张桂银,刘树庆,高如泰.几种电解质对土壤吸附Cu2+的影响[J].生态环境,2003,12(1):8-11. |
| |
| 作者姓名： | 李瑛 李洪军 张桂银 刘树庆 高如泰 |
| |
| 作者单位： | 河北农业大学资源环境学院,河北,保定,071001 |
| |
| 基金项目： | 河北省自然科学基金项目(399107) |
| |
| 摘 要： | 采用平衡吸附法研究了潮褐土、红壤对Cu^2 的等温吸附以及不同pH和电解质对土壤吸附Cu^2 的影响。结果表明，(1)土壤对Cu^2 的吸附量随平衡溶液中Cu^2 浓度增加而增加，潮褐土CuCu^2 最大吸附量明显比红壤的高，约是红壤的4—5倍。(2)体系pH显著影响土壤对Cu^2 的吸附，随pH升高Cu^2 吸附率增加，基本呈S形曲线变化。(3)随体系电解质浓度的增加，土壤对Cu^2 吸附率的变化趋势因土壤性质及体系中电解质种类、浓度的不同而不同。随KNO3浓度提高，土壤Cu^2 吸附率降低。KCl、KH2PO4对潮褐土吸附Cu^2 的影响与红壤的有些不同，低浓度KCl、KH2PO4抑制潮褐土对Cu^2 的吸附，高浓度KCl、KH2PO4促进潮褐土对Cu^2 的吸附，面对红壤。KCl降低Cu^2 的吸附率，KH2PO4提高Cu^2 的吸附率，但随KH2PO4浓度的提高，其提高幅度逐渐减弱。
|
| 关 键 词： | 电解质 土壤 吸附 铜 |
| 文章编号： | 1672-2175(2003)01-0008-04 |
Influence of electrolyte on adsorption of copper in soils |
| |
| LI Ying,LI Hong-jun,ZHANG Gui-yin,LIU Shu-qing,GAO Ru-tai College of Resource and Environment,Agricultural University of Hebei,Baoding ,China.Influence of electrolyte on adsorption of copper in soils[J].Ecology and Environmnet,2003,12(1):8-11. |
| |
| Authors: | LI Ying LI Hong-jun ZHANG Gui-yin LIU Shu-qing GAO Ru-tai College of Resource and Environment Agricultural University of Hebei Baoding China |
| |
| Institution: | LI Ying,LI Hong-jun,ZHANG Gui-yin,LIU Shu-qing,GAO Ru-tai College of Resource and Environment,Agricultural University of Hebei,Baoding 071001,China |
| |
| Abstract: | Cu2+ adsorption isotherms and the influence of electrolyte on the adsorption of Cu2+ were examined for two soils: meadow cinnamon soil and red soil .The results showed that (1) Cu2+ amounts adsorbed by soils increased with the initial concentrations of Cu2+ added. The soil maximum adsorbed Cu2+ is in the order: meadow cinnamon>red soil. (2) Adsorption of Cu2+ increased with rising pH. (3) Increasing the concentration of electrolyte (from 0 to 100 mmolL-1 KCl, or from 0 to 500 mmolL-1 KNO3) caused a decrease of Cu2+ adsorption. The influence of KH2PO4 on Cu2+ adsorption in meadow cinnamon soil is the same to the KCl, but in red soil, increasing concentration of KH2PO4 caused an increase in Cu2+ adsorption. |
| |
| Keywords: | soil Cu2+ electrolyte adsorption |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
