摘要
采用流动法研究了红壤、黄棕壤锌吸附动力学特性，重点研究了溶液ｐＨ，锌溶液的浓度、温度对两种土壤锌吸附动力学特性的影响。实验结果表明：溶液ｐＨ、锌的浓度对土壤锌吸附动力学影响明显；两种土壤对锌的吸附表观上可分为化学吸附和物理吸附。０．０５ｍｏｌ·Ｌ－１ＣａＣｌ２解吸试验表明，Ｚｎ—Ｃａ交换几乎完全可逆。
The kinetics of Zn sorption and desorption in red earth and yellow brown earth was investigated using a constant flow leaching method. Attentions were focused mainly on the effects of the concentration of added Zn,pH value and the ambient temperature on the kinetics of Zn sorptinn and desorption in the two soils. The experimental results indicated that the kinetic characteristics Of Zn sorption in the two soils were affected obviously by pH value and the concentration of added Zn. The mechanism Of Zn sorption in the two soils could be divided apparently into chemsorption and physical-sorption. The result of desorptive experiment with 0. 05 molL-1CaCl2 indicated that Zn-Ca exchange was almost reversible.
出处
《华北农学报》
CSCD
北大核心
1996年第1期81-86,共6页
Acta Agriculturae Boreali-Sinica
关键词
动力学
吸附
解吸
土壤
锌
Sorption
Kinetics
Desorption
Soil
Zinc
