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通过云南三类红壤对Ｃｒ（ＶＩ）吸附行为的研究。结果表明，红壤对Ｃｒ（ＶＩ）有明显的吸附作用，等温吸附曲线可以用Ｆｒｅｕｎｄｌｉｃｈ方程、Ｌａｎｇｍｕｉｒ方程和Ｔｅｍｋｉｎ方程描述。最大吸附量为红壤＞赤红壤＞砖红壤。酸度、温度和有机质对红壤吸附Ｃｒ（ＶＩ）均有影响。低ｐＨ值时吸附量随ｐＨ值升高略有增加，ｐＨ值超过某一限度，吸附量急剧下降，直至基本不吸附；温度低于４０℃时，吸附量随温度升高而减少，但温度高于４０℃时，吸附量不再减少；随有机质加入量的增加，吸附量减少，其相关性红壤和赤红壤达显著水准，砖红壤达极显著水准。
Adsorption of Cr (VI) on Three Kinds of Red Soils in Yunnan Province. The results showed that the red soil had obvious adsorption on Cr (VI), and the isotherm adsorption curve could be described by Freundlich equation, Langmuir equation and Temkin equation. The maximum adsorption capacity of red soil> red soil> brick red soil. Acidity, temperature and organic matter affected the adsorption of Cr (VI) in red soils. At low pH, the amount of adsorption increased slightly with the increase of pH. When the pH value exceeded a certain limit, the amount of adsorption decreased sharply until it was not adsorbed. When the temperature was below 40 ℃, the amount of adsorption decreased with the increase of temperature. However, Above 40 ℃, the amount of adsorption did not decrease any more. With the increase of the amount of organic matter, the amount of adsorption decreased, and the correlation of red and red soil reached significant level, while that of red brick reached a significant level.