J. Technology and Education, Vol.13, No.1, pp.15-18, 2006
ノート
オオバキボウシによるカオリン懸濁液の凝集沈殿
下古谷博司*1，国枝義彦1，岡元悠司1，林征雄2，鈴木郁功2
１鈴鹿工業高等専門学校材料工学科（〒510-0294 三重県鈴鹿市白子町）
*hshimo@mse.suzuka-ct.ac.jp
2鈴鹿医療科学大学保険衛生学部医療栄養学科（〒510-0293 三重県鈴鹿市岸岡町1001）
Flocculation of Kaolin in Suspension with Plantain lily
Hiroshi SHIMOFURUYA1,Yoshihiko KUNIEDA1,Yuji OKAMOTO1,Ikuo HAYASHI2,Ikukatsu SUZUKI2
1Department of Materials Science & Engineering, Suzuka National College of Technology,
Shiroko-cho, Suzuka-shi Mie 510-0294, Japan
2Department of Clinical Nutrition, Faculty of Health Science, Suzuka University of Medical Science,
Kishioka-cho, Suzuka-Shi, Mie 5100293, Japan
(Received May 12, 2006; Accepted May 26, 2006)
Abstract
The flocculating activity of preparations from twelve plant species, including Rhododendrons, Glossy abelia and Chinese peony, on kaolin particles in solution was investigated. Flocculation was observed using a preparation made from Plantain lily at a pH range of 1.5 to 5. Maximum flocculation was observed at pH 3 and no flocculation occurred at neutral or alkaline pHs. Optimal flocculation was observed when the ratio of suspended kaolin particles and flocculant was 50:7. However, heating the flocculant solution in a boiling water bath for 60 min inactivated flocculation. Plantain lily was effective in promoting flocculation in kaolin clay suspensions and was capable of aggregating dispersed kaolin particles in solution to form small flocs that formed sediment.
Key words: Plantain lily, Kaolin flocculation, Flocculant, Plant
