紫色水稻土有机无机复合胶体表面磷吸附的动力学研究(英文)

Study on kinetics of phosphorus adsorption on the surface of organo-mineral colloidal complex in purple paddy soil

通过紫色水稻土有机无机复合胶体对磷的吸附及吸附动力学特征研究 ,表明 :紫色水稻土有机无机复合胶体对磷的吸附能力比土壤高 0 4～ 6 6 9倍 ,不同土壤类型复合胶体对磷的吸附能力不一样 ,复合胶体去除部分有机质后 ,吸附能力明显增加 ;复合胶体对磷的吸附分快反应和慢反应两个过程 ,在 2 0分钟内复合胶体对磷的吸附量占整个过程的 5 2 %～ 71% ,增高温度可提高复合胶体对磷的吸附量和速率 ,Elovich方程对吸附过程的拟合程度最好 .

The P adsorption and adsorption kinetic characteristics of organo mineral colloidal complex (OMC) in purple paddy soil were studied in this paper.Results indicated that the adsorptive ability of organo mineral colloidal complex was 0 4～6 69 times higher than that of soil,and the adsorption ability of different soils was different.The adsorption ability of colloidal complex whose some organic matters were eliminated out was increased obviously. Process for colloidal complex to adsorb P can be divided into fast reacting course and slow reacting course.The amount of P adsorbed by colloidal complex in twenty minutes occupied 52%～71% of total adsorbed P.Improving temperature can raise adsorbing capacity and rate of colloidal complex to P, and Elovich equation which simulated to adsorbing process is the best one.