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 kao-linite.When the concentration of malic acid was 20 mmol·L-1,after reaction ...