Coagulation mechanism of salt solution-extracted active component in Moringa oleifera seeds

被引：158

作者：

Okuda, T ^{[1
]}

Baes, AU ^{[1
]}

Nishijima, W ^{[1
]}

Okada, M ^{[1
]}

机构：

[1] Hiroshima Univ, Fac Engn, Dept Environm Sci, Higashihiroshima 7398527, Japan

来源：

WATER RESEARCH | 2001年 / 35卷 / 03期

关键词：

bivalent cation; coagulation; moringa oleifera; natural coagulant; salt extraction;

D O I：

10.1016/S0043-1354(00)00296-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 bt an enmeshment of Kaolin by the insoluble matters with the net-like structure. In case of Ca2+ ion (bivalent cations), at least 0.2mM 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. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：830 / 834

页数：5

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