Dynamics and Control of Colloidal Phenomena in Agro-environment Determined by Hydrodynamic and Surface Process

分析了环境胶体和界面的物理化学和水动力因素，这些因素通过溶解、成核、胶团化、吸附、扩散、沉淀和流态化等方式控制化学物质的状态和迁移，重点分析了与人类活动和农业生物环境自然条件有关的混凝和絮凝行为，这些活动与计划于2008年京都会议的国际防污染界面密切相关。作为本次研究活动的主线，国内一系列会议都对这一相互关系进行了探讨。1)利用专用粘度计对粘土悬浮液的零剪切极限流变性进行了分析，揭示了双电层在非牛顿行为中的作用；2)用DLVO理论同时分析了流动电位和胶体稳定性在胶体促进输送过程中的有效性。3)分析了聚电解质在胶体表面的动力学行为与胶体颗粒的絮凝作用。

Physicochemical and hydrodynamic factors of environmental colloids and interface which control the state and migration of chemical substances by means of dissolution, nucleation, micellization, adsorption, diffusion, sedimentation and fluidization are analyzed paying emphasis on the coagulation and flocculation behavior in relation to human activity and natural condition of agro-bio-environment.These activities are closely linked to the international community of Interface against Pollution that plans the Kyoto meeting in 2008. The interrelation has been discussed a series of domestic conferences organized as a line this research activity. In addition to this, the following results are obtained in this year.1) The analysis of zero shear limit rheology of clay suspension by means of special viscometer revealed the role of electrical double layers in the appearance of non-Newtonian behavior.2) Validity of simultaneous analysis of the streaming potential and the stability of colloid in the fate of colloid facilitated transportation was revealed in terms of DLVO theory.3) Dynamic behavior of polyelectrolyte on the surface of colloid was analyzed in relation to flocculation of colloidal particles.