Okuda T, Baes A U, Nishijima W, Okada M
Department of Environmental Science, Faculty of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan.
Water Res. 2001 Mar;35(3):830-4. doi: 10.1016/s0043-1354(00)00296-7.
This study focuses on the coagulation mechanism by the purified coagulant solution (MOC-SC-PC) with the coagulation active component extracted from M. oleifera seeds using salt solution. The addition of MOC-SC-PC tap water formed insoluble matters. This formation was responsible for kaolin coagulation. On the other hand, insoluble matters were not formed when the MOC-SC-PC was added into distilled water. The formation was affected by Ca2+ or other bivalent cations which may connect each molecule of the active coagulation component in MOC-SC-PC and form a net-like structure. The coagulation mechanism of MOC-SC-PC seemed to be an enmeshment of Kaolin by the insoluble matters with the net-like structure. In case of Ca2+ ion (bivalent cations), at least 0.2 mM was necessary for coagulation at 0.3 mgC l-1 dose of MOC-SC-PC. Other coagulation mechanisms like compression of double layer, interparticle bridging or charge neutralization were not responsible for the coagulation by MOC-SC-PC.
本研究聚焦于采用盐溶液从油棕种子中提取的具有凝血活性成分的纯化凝血剂溶液（MOC-SC-PC）的凝血机制。向自来水中添加MOC-SC-PC会形成不溶物。这种形成物导致了高岭土的凝聚。另一方面，当将MOC-SC-PC添加到蒸馏水中时，不会形成不溶物。这种形成受到Ca2+或其他二价阳离子的影响，这些阳离子可能连接MOC-SC-PC中活性凝血成分的每个分子并形成网状结构。MOC-SC-PC的凝血机制似乎是具有网状结构的不溶物对高岭土的网捕作用。对于Ca2+离子（二价阳离子），在MOC-SC-PC剂量为0.3 mgC l-1时，至少需要0.2 mM才能发生凝聚。其他凝血机制，如双层压缩、颗粒间桥连或电荷中和，并非MOC-SC-PC凝血的原因。
