采用静态吸附法和淀粉-三碘化物比色法研究了聚丙烯酰胺Polyacrylamide(PAM)在非盐和三种不同溶解盐的轻度、中度及重度盐渍化砂壤土上的吸附行为,考查了不同液固比、吸附时间对土壤吸附量的影响。结果表明,PAM在非盐、轻度盐渍化砂壤土中吸附最佳液固比均为20∶1,吸附平衡时间为8 h,在中度、重度盐渍化砂壤土中吸附的最佳液固比是25∶1,吸附平衡时间是6 h。说明溶解盐含量较少对PAM在砂壤土中的吸附的最佳液固比、吸附平衡时间并无影响,而当溶解盐含量增加到一定程度,吸附最佳液固比增大,吸附平衡时间减小。四种土壤吸附等温线均采用Langmiur等温方程进行拟合,相关系数都达到0.96以上。并得到PAM在四种盐渍化砂壤土中的吸附量呈现出非盐渍渍化土<轻度盐渍化土<中度盐渍化土<重度盐渍化土的规律,其饱和吸附量分别为0.68、0.74、1.04和1.11 mg g-1,四者差异达到显著水平(P<0.05),且轻度、中度及重度盐渍化砂壤土的饱和吸附量分别比非盐渍化砂壤土增加了8.82%、52.94%、63.24%。说明随着溶解盐含量增加砂壤土对PAM的吸附量增大。 The adsorption behavior of polyacrylamide (PAM) on mild, moderate and severe salinized sandy loam with non-salt and three different dissolved salts was studied by static adsorption method and starch-triiodide colorimetric method. The effects of different liquid-solid ratio and adsorption time on soil adsorption capacity were studied. The results showed that the optimum liquid-solid ratio of PAM in non-salt and mild salinized sandy loam was 20:1, and the adsorption equilibrium time was 8 h. The adsorption of PAM was the best in medium salinized sandy loam The liquid-solid ratio is 25: 1 and the adsorption equilibrium time is 6 h. The results showed that the optimum liquid-solid ratio of adsorption of PAM in sandy loam soil had no effect on the equilibrium adsorption time of PAM. However, when the dissolved salt content increased to a certain extent, the optimum adsorption liquid-solid ratio increased, Decrease Four kinds of soil adsorption isotherms were fitted by Langmiur isotherm equation, the correlation coefficients reached more than 0.96. The results showed that the adsorption capacity of PAM in four kinds of salinized sandy loam showed the regularity of non-salinized soil