Influnce Of Ions And Montmorillonite On Adsorption Of Streptomycin In Soils

Inner Mongolia Autonomous Region has been one of China’s important base of livestock where more than 110 million domestic animals were bred in 2014, and veterinary medicine cost largely. This has led to the increase of antibiotic residues in the environment. In recent years, heavy metals pesticide and fertilizer pollution in soil are also increasingly more serious. In actual soil environment, the contaminants are usually more complex, often with complex contamination formed in the presence of combined pollution. Thus, for the study of the soil, combined pollution is very important. In this paper, as streptomycin for the study focus, we studied the influences of combined pollution under different conditions ions and the adsorption of streptomycin on montmorillonite.First, static adsorption experiments were applied to study the effect of calcium, sodium and potassium on soil adsorption streptomycin and the existence of cations had promoted the adsorption of streptomycin in the soil. The promoting effect weakened with ion concentration increases. Furthermore, this paper focused on the combined adsorption of streptomycin and copper on Fluvo-aquic soil and black soil. Studies have shown that the presence of copper promoted adsorption of streptomycin on the two soils, however, the presence of streptomycin suppressed adsorption of copper, thought to be the reason which the formation of a complex of copper. pH may had effect on complex.Secondly, the effects of three kinds of anion on soil adsorption streptomycin through research showed that the adsorption strength of streptomycin are:P> N> Cl> no anion. That may be because it largely increased soil surface negative charge after anion joining.Finally, we studied the adsorption of streptomycin on montmorillonite, using chromatography, IR and XRD detection. We found that montmorillonite had a high adsorption quantity and the main mechanism of adsorption was cation exchange.