采用静态吸附法研究了聚丙烯酰胺在黑土上的吸附行为,考查了不同吸附时间对土壤吸附量的影响,得出了聚丙烯酰胺在土壤上的吸附等温线.并且研究了聚丙烯酰胺在黑土上的解吸行为,探讨了振荡时间、液固质量比、温度、pH值对黑土中聚丙烯酰胺解吸的影响.结果表明,聚丙烯酰胺在黑土上的吸附等温线符合Langmuir吸附模式,饱和吸附质量比为1.17 mg/g,聚丙烯酰胺在土壤上有很强的吸附亲合力,在实验条件下,最大解吸量仅为总量的25%.%The adsorption of polyacrylamide(PAM) on the black soil was studied by means of static adsorption method. The effects of static adsorption time on the capacity of PAM adsorption on the soll were examined and the adsorption isotherms of PAM on the soil were measured. Moreover, the desorption behavior of PAM on the black soil was also studied. The impact of shaken desorption time, mass ratio of solid/liquid, temperature and pH on the desorption of PAM on the black soil was analyzed. The results show that the adsorption isotherms are consistent with Langmuir model and the PAM saturated adsorptive capacity on black soil is 1.17 mg/g. PAM has a high adsorptive affinity on the black soil. The maximum desorption capacity on the black soil shares only 25% of the whole under the experimental conditions.
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