安徽农业大学学报2013，Vol.40Issue(1)：112-115,4.
苹果酸对高岭石中铝和硅释放的影响
Effect of malic acid on aluminum and silicon release from kaolinite
摘要
Abstract
Experiment was conducted to investigate the long-time dissolution effects of water-eluviated and acid-eluviated kaolinite with batch method in malic acid solution. The results showed that malic acid significantly enhanced Al and Si release from kaolinite, and release of Al and Si from kaolinite increased with the increase of concentration of malic acid. Acid-eluviated kaolinite was more easily dissolved than that of water-eluviated kaolinite. When the concentration of malic acid was 20 mmol·L-1, after reaction for 936 hours, the release amount of Al and Si from water-eluviated kaolinite was 0.51 mmol·L-1 and 0.57 mmol·L-1, which were 86.44% and 83.82% of the release amount of Al and Si from acid-eluviated kaolinite. The preferential Si-release of kaolinite was observed initially, but at reaction anaphase, when the concentration of malic acid were less than 20 mmol/L, Al and Si showed stoichiometric release. Dissolution rate of kaolinite increased with the increase of concentration of malic acids, and dissolution rate of acid-eluviated kaolinite was higher than that of water-eluviated kaolinite; the dissolution rate didn't show the character of saturation, and the dissolution rate indiated the increasing character of linearity; malic acid significantly enhanced Al and Si release from kaolinite, and the acid-eluviated kaolinite was more easily dissolved than water-eluviated kaolinite in the malic acids reactive solution.关键词
高岭石/苹果酸/同步性/溶解速率/酸洗/水洗Key words
kaolinite/malic acid/stoichiometry/ dissolution rate/acid-eluviated/ water-eluviated分类
农业科技引用本文复制引用
胡华锋,王慧杰,王兴祥,介晓磊,李清曼..苹果酸对高岭石中铝和硅释放的影响[J].安徽农业大学学报,2013,40(1):112-115,4.基金项目
国家自然科学基金(40371067)和中国科学院知识创新工程项目(KZCX3-SW-417和ISSASIP0208)共同资助. （40371067）
