华南农业大学学报2013，Vol.34Issue(2)：158-161,4.
不同浓度草酸对酸沉降下高岭石的溶解作用
Dissolution of Acid-Eluviated Kaolinite Induced by Different Concentrations of Oxalic Acid
摘要
Abstract
Experiments were conducted to investigate the long-time dissolution effect of acid-eluviated ka-olinite with batch method in oxalic acids solution. The results showed oxalic acids enhanced significantly Al3 + and Si4 + release from kaolinite, compared with deionised water, and release of Al3 + and Si4 + from kaolinite increased with concentration of oxalic acids. The time of dissolution stoichiometry of kaolinite in the oxalic acids solution was later than the citric acids, and preferential Al3 + -release was observed initially and after reaction anaphase, Al3 + and Si4 + showed stoichiometric release. The rate of kaolinite dissolution obtained in oxalic acid solution was almost one order of magnitude as large as that of inorganic acid, and which was higher than the citric acids, and dissolution rare did not reach saturation under the studied concentration of oxalic acids noted in this study, the dissolution rate presented an increasing character of linearity with the concentration of citric acids.关键词
高岭石/草酸/同步性/溶解速率Key words
kaolinite/ oxalic acid/ stoichiometry/ dissolution rate分类
农业科技引用本文复制引用
胡华锋,冯广鹏,王兴祥,介晓磊,李清曼..不同浓度草酸对酸沉降下高岭石的溶解作用[J].华南农业大学学报,2013,34(2):158-161,4.基金项目
国家自然科学基金(40371067) （40371067）
中国科学院知识创新工程项目(KZCX3-SW-417,ISSASIP0208) （KZCX3-SW-417,ISSASIP0208）
