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选用不同电性、电量及分子量的PAM、两种典型的纯净粘土矿物样本,就PAM对分散的粘土颗粒的絮凝能力和机制、粘土矿物对PAM的吸附及解吸附进行了研究。结果表明,在没有阳离子桥的情况下,3种PAM对粘土矿物的絮凝能力依次为:阳离子PAM>非离子PAM>阴离子PAM,阳离子PAM为有效的絮凝剂,而阴离子PAM则为分散剂;粘土矿物对PAM的吸附量除与PAM的电性关系非常密切外,也受到粘土矿物本身特性的影响,尤其是所带电荷的性质与数量及比表面积的大小;PAM一旦被粘土颗粒所吸附,解吸附几乎是不可能的。PAM与粘土间复杂错综的相互作用关系构成了PAM在土壤改良、混水净化中应用的理论基础。
Two types of typical pure clay mineral samples with different electrical, electric quantity and molecular weight were selected to study the flocculation capacity and mechanism of PAM on dispersed clay particles and the adsorption and desorption of PAM by clay minerals. The results showed that in the absence of cation bridge, the flocculation capacities of three kinds of PAM on clay minerals were as follows: cationic PAM> nonionic PAM> anionic PAM, cationic PAM as effective flocculant and anionic PAM as dispersant; clay In addition to the very close relationship between the adsorption of PAMAM and PAM, the minerals are also affected by the characteristics of clay minerals, especially the nature and amount of charges and the specific surface area. Once PAM is adsorbed by clay particles, Adsorption is almost impossible. The complex and intricate interaction between PAM and clay constitutes the theoretical basis for the application of PAM in soil improvement and water purification.