Pedosphere 14(3): 405--408, 2004
ISSN 1002-0160/CN 32-1315/P
©2004 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of low-molecular-weight organic acids on Cl- adsorption by variable charge soils |
XU Ren-Kou1 , YANG Ma-Li2, WANG Qiang-Sheng2 and JI Guo-Liang1 |
1 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: rkxu@issas.ac.cn;
2 College of Agronomy, Nanjing Agricultural University, Nanjing 210095 (China) |
| ABSTRACT |
| 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 Cl- adsorption in the lateritic red soil and the red soil was more affected by both the LMW organic acids than that in the latosol. |
| Key Words: Cl- adsorption, organic acids, variable charge soils |
| Citation: Xu, R. K., Yang, M. L., Wang, Q. S. and Ji, G. L. 2004. Effect of low-molecular-weight organic acids on Cl- adsorption by variable charge soils. Pedosphere. 14(3): 405-408. |
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