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| 柠檬酸对酸沉降下高岭石的溶解作用 | |
| 引用本文： | 胡华锋,王兴祥,介晓磊,李清曼.柠檬酸对酸沉降下高岭石的溶解作用[J].江西农业大学学报,2007,29(5):846-850. |
| 作者姓名： | 胡华锋 王兴祥 介晓磊 李清曼 |
| 作者单位： | 1. 郑州牧业工程高等专科学校,河南,郑州,450011 2. 中国科学院,南京土壤研究所,江苏,南京,210008 3. 中国科学院,水生生物研究所,湖北,武汉,430072 |
| 基金项目： | 国家自然科学基金(KZCX3-SW-417)，中国科学院知识创新工程项目(ISSASIP0208) |
| 摘 要： | 采用间歇法(batch method)模拟研究酸沉降下的高岭石在柠檬酸溶液中的长期溶解效应。研究表明:柠檬酸能显著促进高岭石Al和Si的释放,且Al、Si的释放能力随柠檬酸浓度的增加而增强;高岭石溶解同步性与柠檬酸浓度有关,随着柠檬酸浓度的提高,其溶解的同步性增强,且反应前期高岭石都表现为Al的优先释放,而在反应后期Al、Si趋于同步释放。柠檬酸对高岭石的溶解速率一般较无机酸高1个数量级左右,且其溶解速率表现出对柠檬酸浓度的饱和性。 |
| 关 键 词： | 高岭石 柠檬酸 同步性 溶解速率 酸沉降 |
| 文章编号： | 1000-2286（2007）05-0846-05 |
| 收稿时间： | 2006-11-13 |
| 修稿时间： | 2007-07-09 |
Dissolution of Acid-eluviated Kaolinite Induced by Citric Acid |
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| HU Hua-feng,WANG Xing-xiang,JIE Xiao-lei,LI Qing-man.Dissolution of Acid-eluviated Kaolinite Induced by Citric Acid[J].Acta Agriculturae Universitis Jiangxiensis,2007,29(5):846-850. | |
| Authors: | HU Hua-feng WANG Xing-xiang JIE Xiao-lei LI Qing-man |
| Institution: | 1. Zhengzhou College of Animal Husbandry Engineering, Zhengzhou 450011,China; 2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008; 3.Institute of Hydrobiology, Chinese Academy of Sciences,Wuhan 430072,China |
| Abstract: | Experiments were conducted to investigate the long-time dissolution effect of acid-eluviated kaolinite with batch method in citric acids solution.The results showed that citric acids enhanced significantly Al and Si release from kaolinite,and release of Al and Si from kaolinite increased with concentration of citric acids.Dissolution stoichiometry of kaolinite was related to concentration of citric acids,dissolution stoichiometry of kaolinited increased with concentration of citric acids,and preferential Al-release was observed initially and after reaction anaphase.Al and Si showed stoichiometric release.The rate of kaolinite dissolution obtained in citric acid solution was almost 1 order of magnitude as large as that of inorganic acid,and the dissolution rate behaved the character of saturation with the concentration of citric acids. |
| Keywords: | Kaolinite citric acid stoichiometry dissolution rate acid-eluviation |
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