Effect of Low-Molecular-Weight Organic Acids on Cl-Adsorption by Variable Charge Soils  

作　　者：XURen-Kou YANGMa-Li WANGQiang-Sheng JIGuo-Liang 

机构地区：[1]InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008（China） [2]CollegeofAgronomy,NanjingAgriculturalUniversity,Nanjing210095（China）

出　　处：《Pedosphere》2004年第3期405-408,共4页土壤圈（英文版）

基　　金：Project supported by the Knowledge Innovation Program Foundation of the Chinese Academy of Sciences (No. ISSASIP0108) ;the National Natural Science Foundation of China (No. 40271062).

摘　　要：Low-molecular-weight (LMW) organic acids exist widely in soils and have beenimplicated in many soil processes. The objective of the present paper was to evaluate effect of twoLMW organic acids, citric acid and oxalic acid, on Cl^-adsorption by three variable charge soils, alatosol, a lateritic red soil and a red soil, using a batch method. The results showed that thepresence of citric acid and oxalic acid led to a decrease in Cl^- adsorption with larger decreasesfor citric acid. Among the different soils Cl^- adsorption in the lateritic red soil and the redsoil was more affected by both the LMW organic acids than that in the latosol.Low-molecular-weight (LMW) organic acids exist widely in soils and have been implicated in many soil processes.The objective of the present paper was to evaluate effect of two LMW organic acids, citric acid and oxalic acid, on Cl- adsorption by three variable charge soils, a latosol, a lateritic red soil and a red soil, using a batch method. The results showed that the presence of citric acid and oxalic acid led to a decrease in Cl- adsorption with larger decreases for citric acid. Among the different soils Gl- adsorption in the lateritic red soil and the red soil was more affected by both the LMW organic acids than that in the latosol.

关 键 词：Cl^- adsorption organic acids variable charge soils 

分 类 号：S156.6[农业科学—土壤学]