Pedosphere 9(3): 233--242, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Effect of Cr(Ⅵ) and p-chloroaniline interaction on their reaction behaviors on soil colloids
ZHOU Dong-Mei and CHEN Huai-Man
Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 21O008 (China)
      Adsorption of Cr(Ⅵ) and p-chloroaniline on three typical soil colloids and pH influence were studied using batch equilibrium method. Both of Cr(Ⅵ) and p-chloroaniline adsorption on the colloids could be well described by general adsorption simulation equations. The adsorption processes changed with media pH. When Cr(Ⅵ) and p-chloroaniline coexisted on soil colloids, their interactions could be observed in a certain pH range to be accompanied with Cr(Ⅵ) reduction, which clearly suggested that a surface catalytic reaction occurred in this system. Soil colloid acted as an efficient catalyst for the interaction of Cr(Ⅵ) and p-chloroaniline. The pH values at which no interaction was observed were 4.0, 4.5 and 5.0 for the colloids of indigotic black soil, yellow-brown soil and latosol, respectively. Capillary electrophoresis used to analyze p-chloroaniline provided a high separation efficiency and short separation time, and needed no more extensive pretreatment of samples.
Key Words:  Cr(Ⅵ), interaction of pollutants, p-chloroaniline, soil colloids
Citation: Zhou, D. M. and Chen, H. M. 1999. Effect of Cr(Ⅵ) and p-chloroaniline interaction on their reaction behaviors on soil colloids. Pedosphere. 9(3): 233-242.
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