黄壤、棕壤对铬（VI）吸附特性的研究

通过振荡平衡法研究黄壤、棕壤对Cr（VI）的吸附行为，结果表明，在酸性条件下土壤对Cr（VI）的吸附量远高于碱性条件下的吸附量，随温度的升高黄壤、棕壤对Cr（VI）的吸附量增加。土壤本身理化性质不同，其对Cr（VI）的吸附量有很大差异；土壤吸附Cr（VI）量与游离铁铝氧化物及粘粒含量呈显著正相关，而与有机质及土壤pH值呈负相关。供试土壤等温吸附Cr（VI）量表现为黄壤＞棕壤。随着土壤有机质含量的增加，土壤Cr（VI）的等温吸附平衡浓度下降，对Cr（VI）的吸附能力下降。

Study on Adsorption Properties of Chromium(VI)in Yellow Soil and Brown Soil

We performed a series of oscillation equilibrium experiments to simulate the adsorption behavior of Cr (VI)for the yellow soil and brown soil. The results show that under a acidic soil conditions,adsorption of Cr(VI)is far higher than that of in alkaline conditions. The Cr(VI)adsorption of yellow soil and brown soil rise with the tem?perature. The physical and chemical properties of soil are different,and its adsorption of Cr(VI)will be a big differ?ence. Soil adsorption amount of Cr(VI)was significantly positively related to the free iron/aluminum oxide and clay content,and negative associative to organic matter and pH. The adsorption of Cr(VI)in the isothermal tested was yel?low soil>brown soil. With the increase of organic matter content,the concentration of Cr(VI)in the isothermal ad?sorption equilibrium experiments decreased,and the adsorption capacity of Cr(VI)was subdued too.