长江口絮凝聚沉特征与颗粒表面理化因素作用——Ⅱ颗粒表面性质对聚沉的作用

Coagulation,settling characteristics and action of surface physico-chemical factors of particles in the Changjiang Estuary ——Ⅱ.role of surface colloidel property variation on the coagulation and settling of particles

本文通过１９８６年和１９９０年现场测试资料研究了长江口区悬浮颗粒的表面性质（ＣＥＣ、ＳＳＡ、Ｚｅｔａ电位）和组分（Ｃ、Ｎ、Ｐ、Ａｌ、Ｆｅ及其水合氧化物）的变化特征，结合前文（Ⅰ·悬浮颗粒絮凝沉降特征）所阐明该区絮凝聚沉状态和若干参数的特征变化，从中发现它们的密切对应关系，揭示了长江口区絮凝聚沉状态和体系稳定性变化的物理化学机制，证明颗粒表面组分与表面性质的变化是絮凝聚沉的本质因素。为长江口区絮凝聚沉的深入研究和综合整治提供重要的科学基础。

This paper reports the characteristics variance of surface colloid properties (CEC,SSA,Zeta potential) and constituent (organic-C and N,P,C/N,amorphous oxide of Fe and Al) of suspended particles in the Changjiang Estuary,on the basis of the data obained from situ investigation during July,1986 and August, 1990. From the variaion of some characteristic paramters, which was described in another paper(Ⅰ.Coagulation and Settling Characteristics of the Suspended Particles), some closely corresponding relations were discovered. The physico-chemical mechanisms of variance of coagulation state and the dispersion system stability of colloid particles in the Changjiang Estuary were expressed,and it is comfirmed that the surface constituent and surface colloidal properties are essential factors of coagulation and settling. These results provide an improtant scientific base for penetrate into study of coagulation and settling, and integration harness of the Changjiang Estuary.