Effect of low-molecular-weight organic acids on adsorption of quinclorac by clay minerals

The effect of low-molecular-weight organic acids (citric acid,tartaric acid,malic acid,acetic acid,oxalic acid and succinic acid) on adsorption of quinclorac by three clay minerals (kaolinite,montmorillonite and attapulgite) was investigated by a batch experimental technique.The results showed that the adsorption isotherm of quinclorac in clay minerals could be well described by Freundlich and Linear equation under the presence of low-molecular-weight organic acids,but the Freundlich equation was more suitable.The tested six kinds of low-molecular-weight organic acid showed different effects on adsorption quantity of quinclorac on kaolinite.The order from low to high influence were:malic acid