HOME    About this site    mypage    Japanese    library    university    Feedback

University of the Ryukyus Repository >
Faculty of Science >
Bulletin >
Bulletin of the College of Science, University of the Ryukyus >
No.79 (2005/3) >

 
Title :赤土コロイドの凝集沈降
Title alternative :Coagulation-Sedimentation Rates of Red Soil Colloids
Authors :米蔵, 誠哲
大森, 保
小柳, 元彦
Authors alternative :Yonekura, Nobuaki
Oomori, Tamotsu
Koyanagi, Motohiko
Issue Date :Mar-2005
Abstract :To evaluate the effect of three major cationic species in natural waters, Na^+, Mg^<2+> and Ca^<2+>, on the coagulation-sedimentation of negatively charged red soil colloids,the sedimentation rates in electrolyte solutions have been measured optically. The Ca^<2+> critical coagulation concentration has been determined to be 0.5 mM. It has been found that the sedimentation time in synthetic groundwater, which is almost a 2 mM CaCO_3 solution, is comparable to that in synthetic seawater with a high ionic strength of 0.5.
Type Local :紀要論文
ISSN :0286-9640
Publisher :琉球大学理学部
URI :http://hdl.handle.net/20.500.12000/12147
Citation :琉球大学理学部紀要 = Bulletin of the College of Science. University of the Ryukyus no.79 p.103 -109
Appears in Collections:No.79 (2005/3)

Files in This Item:

File Description SizeFormat
No79p103.pdf535KbAdobe PDFView/Open