粘土矿物去除赤潮生物的动力学研究

STUDY ON THE KINETICS OF CLAYS REMOVING RED TIDE ORGANISMS

于1992年4－9月进行粘土矿物絮凝赤潮生物（微型原甲藻）的动力学研究；考察粘土种类、浓度、第二组分（PACS）和PH等因素对絮凝速率的影响，建立粘土矿物絮凝赤潮生物的动力学模型，从理论上分析和讨论各种因素的影响，并提出提高絮凝速率的方法和途径。结果表明，高岭土体系的絮凝速率大于蒙脱土体系，其速率方程可用双分子反应来描述。其中，速率常数随絮凝过程发生变化；粒子间的相互作用能和作用半径是控制和影响絮凝速率的主要因素。实验发现，虽然增加粘土浓度能提高絮凝速率，但并非是很有效的方法，在粘土中引入PACS则是最有效的途径。

The kinetics of red tide organism (Prorocentrum minimum) coagulation withclays is studied in Apr.-Sept., 1992. The effects of different kinds and concentrations of clays, of the second component PACS (polyhydroxy aluminum chloride) added in clays, and of pH on the coagulation rate are examined. A model of the kinetics of red tide organisms coagulation with clays is established, which theoreticallyaddresses the factors affecting the coagulation rate and suggests ways to increase thecoagulation rate, The results show that the coagulation rate is more rapid in thesystem of kaolin than in that of montmorillonite, and that the kinetics equation forthese systems describeds bimolecular reaction, in which the rate constant is variedin the process of coagulation. The potential energy and radius of interaction between clay particles and organism cells are the major factors controlling the coagulationrate. It is found that the increase of clay concentration can accelerate coagulation,but is not the most effective way. Adding PACS in clays appears to be the mosteffective way of increasing the coagulation rate.