聚丙烯酰胺在土壤中的垂向迁移行为

Study on the Transferring of Polyacrylamide in Different Soil

通过室内土柱试验,研究了聚丙烯酰胺(PAM)在不同土壤(黑土、黄土)中垂向迁移行为(自然迁移、模拟降雨),初步探讨了PAM在土壤中的垂向迁移特性。实验结果表明,土壤对PAM有很强的截留能力,PAM很难向土壤深层迁移,绝大部分PAM被截留在土壤表层,土壤中可检出的PAM最大迁移深度为10cm,大于87%的PAM主要分布于5cm以上的土壤中。在相同条件下,PAM迁移深度黄土大于黑土,表层土壤中PAM含量黑土大于黄土。本研究为今后PAM的扩大应用及其污染治理提供了参考。

In order to study the transferring behavior of polyacrylamide(PAM) in different soil,the experiment simulation of soil cylinder was carried out in the laboratory.The characteristics of PAM transferring through soil columns was expounded and discussed.The research show that soil have high capacity of absorbing and holding PAM.PAM is hard to be transported into a deep layer of the soil.Most PAM are kept in the surface soil.The maximum transferring depth of PAM is 10cm in the process of experimental simulation,and more than 87 percent PAM distributed in the soil of above 5cm deep.In addition,under the same experimental conditions,the amounts of PAM in the surface of black earth is higher than that of loess while the transferring depth of PAM in loess is higher than that in the black earth.This paper is a full reference for PAM future application and treatment.