基于高岭石是土壤中广泛分布着的黏土矿物之一，采用批处理实验方法开展高岭石对盐酸四环素（TC）的吸附性能研究，着重考查TC初始浓度、支撑电解质和温度等因素的影响。研究结果表明：高岭石对TC的吸附非常符合Freundlich等温吸附模型，并呈现显著的非线性特征；且在pH=3的酸性条件下，TC浓度升高到一定程度（>60 mg/L），TC在高岭石上的吸附得到进一步增强。同时温度显著地影响高岭石对TC的吸附，表现为温度促进TC在高岭石上的吸附。此外，电解质加入显著影响高岭石对TC的吸附。因此，静电作用对TC在高岭石上的吸附起着重要贡献。%Based on kaolinite (Kt) that is one of widespread clay mineral in soil, the batch experiment methods were appli-ed to explore the adsorption nature of Kt for tetracycline, with emphasis on the influences of initial TC concentration, background electrolytes, and reaction temperature on the adsorption. The results showed that adsorptions of Kt for TC can be well fitted to Freundlich model, representing highly nonlinear adsorption characteristics. However, under conditions at stronger acidic medium pH (pH=3), there existed further improved TC adsorption onto kaolinite as is selected the much more increase of initial TC concentration, up to 60 mg/L and higher. Meanwhile, temperature factor can greatly influence the TC adsorption, where the temperature promotes the TC adsorption. As to background electrolytes, they can also evidently affect the TC adsorption. Hence, the electrostatic interactions significantly contribute to TC onto kaolinte.
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