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ID 14655
本文ファイル
著者
Baes, Aloysius U.
Okada, Mitsumasa
キーワード
coagulation
kaolinite
low turbid water
moringa olelfera
natural coagulant
water treatment
NDC
公害・環境工学
内容記述
A new method for the extraction of the active coagulation component from Moringa oleifera seeds was developed and compared with the ordinary water extraction method (MOC–DW). In the new method, 1.0 mol l-1 solution of sodium chloride (MOC–SC) and other salts were used for extraction of the active coagulation component. Batch coagulation experiments were conducted using 500 ml of low turbid water (50 NTU). Coagulation efficiencies were evaluated based on the dosage required to remove kaolinite turbidity in water. MOC–SC showed better coagulation activity with dosages 7.4 times lower than that using MOC–DW for the removal of kaolinite turbidity. MOC–SC could effectively coagulate more than 950f the 50 NTU initial kaolin turbidity using only 4 ml l-1, while 32 ml l-1 of MOC–DW could only remove about 781023440400f the same kaolin turbidity. The improvement of coagulation efficiency by NaCl is apparently due to the salting-in mechanism in proteins wherein a salt increases protein–protein dissociations, leading to increasing protein solubility as the salt ionic strength increases. There was no difference in the coagulation efficiency observed for extracts using any of four 1:1 salts (NaCl, KNO3, KCl and NaNO3) in our study. Purification and isolation of the active component confirmed that the active component of MOC–SC was mainly protein.
掲載誌名
Water Research
33巻
15号
開始ページ
3373
終了ページ
3378
出版年月日
1999-10
出版者
Elsevier
ISSN
0043-1354
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 1999 Elsevier Science Ltd.
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1016/S0043-1354(99)00046-9
部局名
環境安全センター
工学研究科