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J. Jpn. Soc. Soil Phys.
¼= aNo. 30, p. +3,0 ,**.

   *Settling Pattern, Settling Rate and Zeta Potential of Marine ClayFumiyoshi KONDO** Faculty of Agriculture, University of Miyazaki, +ῌ+ Gakuen Kibanadai-nishi, Miyazaki 223ῌ,+3,, Japan+     LOHIJKtPsttP%tP{|>#<B#7}

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7EJF (7Pd%& $( ,~j$¢A{|>#. I'=G%LMNOPQ zUzNrOPQ PPQ trPQ* ¶·/lblI ¸223ῌ,+3, ¶·¹lº »cd +ῌ+ : JK  5678­®`,>4?qrst<¯°¦pK±² ³¤$,P´aµAx1`!c,>4?º^ » 30 ¼ ,**.20ῌ+Fig. +©A5Schematic diagram of settling pattern.

 ῌ,Fig. , . 234*9 :56/78/;<Settling pattern of Ariake-kantaku clay.

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;a&(b' ]C^\$6%©A5ªY1D6_%`/( %&'' %,-6c)_%`/defK !"#&TU3 y0«*¬f''.  

 %6c)gA:gY­®0 ]C^\$h5 . 65 / ijklῌmn&(g6/% c) - N*i/ #;*o9 D\$i9  TU3 ,, :+6/ Mpqi/15 , r, +330 a 5-snKt . Nuv.w*x%n_/1DA: .,***ῌ JK ]C^\$ 
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oy VWVK>L$&$%$& 0z , : + {^4 ($JWuv123|U}/G ~82i3|U}/4 4lVWVK>L$&$%$&'3|U}/4  )VWVK>L$&,q $%$&)5H i4=$& VWVK>L$&0G Y6VWVK>L$&7G08)S*)4=$& x,qRS5,q^ 4 c9:! =$&ip*5,q/U  ,q4S*)4 e; +32. ; Wilson, +321h"ῌFig. -Na N&¡=$'Settling pattern of Na-saturated Leda clay.t ; u 30 ¼ C,**.D22           !""  $" *" !# 

 1/*%,,/**῍&'() !" !#        !" !#K^_N M!"6[ ^WC PD (# dN Q9gPO P" H   567  ABd ,  PO=P(/]# U"   M!"6jk<=F . .+  !"#+,-+.    /0"1# , 2A4 "> ,0%,2 gῌL(# (" 32 45678A /**%/,***῍ "#"5RV9 .:.;"<=>?@AB#'ῌ OW . /-,H I.JK L!AM6MN"#OP$%"#Q"5R &'(Q S) AT*U

 +,***῍ }  W . "Bd6MN   +,***῍ }) "W / "Bd6MN  (N[  XTorrance C+32-D  -.E--+. F"5G Cw*DV(W(AXYG Z+6TG Y"N N5 V /,***῍ } W , "Bd6M"^_ "#W . "B#G Z ,,/**῍[ 4"5G )"M\(AP"#G [\QX¡^"]X A¢£dw.

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7ῌ45 +32.D8n^d9(¦§K,_( `¨©b'ῌ O"jk#G= (ª«_$%   9g A:h#;< =T   (ia&?¬^_<­bc"6G®T XAW 0  'ῌO"5R]X

"jk*UA=ld(-.E--+. FAB#GB#= C>d_ +330 aD efgmdT Nn> =    !"  X¯°hO?"(op?q r#4 -.E--+. !#G H V=!

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s"tA#ab"WGXY N5 u,,/**῍ }"N( ¯°,"N  6M" v-w.;q  "B#G +,-+.Cuv- w.;q DEx <=F#GyD =efg R4¬± i ²+,-+.8   8p?567]p?

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((="4¬±N efg(V 9*U jkAzR(HI {|BJ(N i$%+,-+.9 CNa KL , mm }) 9 /3῍ $"³;#efgA"5G= i ~8^_D "WG &<Xj/  E ;ῌ]p?q(! 0`uv-w.; M! Na } .J8k ´?r#G"=µ_¶  X"y #^# (K N ]"M +῍ })   "6"4¬Ny #^# i *U9[   y"6=N N5yABd(  /]"PO ^WC PD 4 "5G E ·E-¸%A¹lmn 00PO m oº¹l"6[# E(="·E-# dN Q9g

P" H    567 ABd ,  PO=P(/]# -* gῌL $%AB#G efgpq #9» 4¬·E-A¸#G "B#G R   PO 9$]S M! &VosN·E-A r¸#G U<  ;.^_T#(s?   ·E-¸% y  "5µ¶·¸ : D56EF  ¹ºg»¼ Z23     !"#$ %&'%()ῐ*+,-./ 012  3 ΐ4ῒ56789:56;<=ῌ>?@-A 56B<CD EFGH .ῑI .JJK2LMNOG !$P#Q#QMNXKY ZFig. .

789:56 ¤,_§bR%ῌTime-settling curves of typical zone settlingfor Ariake-kantaku clay in sea water.

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RS"T=U;82J# " TSVW31 ! \_56&'G !#VMD;4$# MD XKYG`a '_" ΐ4ῒ56789:56 b Gcd2 ; 56B<";efghij7῎ kl-mhno"; Ca j7῎ 2 56pqXKYG`r>sj7῎"` tT" uvwNῌ56 x mhnokly= zs
y= 7{<|}V~Q ,_"V~Q #b j,;H.῏ .,***῍mhnokly=*zsy=VqR%ῌ; ῌ῍6. uvwNq #$ΐ4ῒ56G789:56Y.; . ῌ/789:56²³ ¤,_§bR%ῌFig. /Time-settling curves of typical consolidation settling for Ariake-kantaku clayin sea water.

 !  J 7{<V|}qR%ῌ; ῌ῍6. uvwNq !$P#Q 7{<V|}῍6; uvwNt

 J#YG tq;789:56Y.ΐ4ῒ56G"` 7{<V|}T Q  j,K2L ΐ4ῒ56789:56,_ b
;@$#Q 1 ; 0῍ r>,, ῎V¡17{<|}qV¡>¢ ,_"~Qp£"` ¤¥¦2 +330 a§ uvwN#K¨r>,,V© q bGῌ῍6. ª "`Y r>,, ῎G«  7{<j7῎G ¬  ῌ῍6. ;T 2p£J2 uvwN bΐ4ῒ56789:56,_" ; klmhno*r>sj7῎ ";#$ ῌ῍6_7{<D­ῌ0Fig. 0j,X´ ¤,_§Relationship between settling rate andinitial water content in sea water.

® /    2 ; ΐ4ῒ56789:56¯°V *.*/±º3 » 30 ¼ ,**.24ῑῒῌ+Photo. +
ΐῌ1=

b

¶³Fig. 1Relationship between settling rate andorganic matter content in sea water (w*῍.,***ῌ).!"#$%Microelectrophoretic device.

6¤¸ w*¹.,***῍+0 gῌL  +330 a  !"#$%&'()*( +, + &-$%N./01+313 a&'()234)567&89):; < #= >'?
+313 b >'?BῌC"#D @A1+32* 67&89

E Smoluchowski !&'()ΐῌ2

 @A-F " GHIJ KL & MNOPQR ῌST +31, R()UV&0WXIYZ[\&]5) ^OabcdFig. 2

ef gh+311 -&'4  KRqraf .nO  K&b4)5 % Ro mV p&[qrYsRPt Euvn&w)>xabyOz!bOd" }JE&|xO &~'b ((&>iqr a/( < a0&¡ ¢ £¡¢&¤- ¥¦&>5)2+¥¦R"4*.*/*., gῌL  &~R / mV t  ,*++ mV /u . 1\ {# R|xO&$5 %'¤¸ _`-ij_abkO5 E lmn&)  {#b{#Relationship between zeta potential andsalt concentration.

|x {#0ῌ ῏ ῎ ῐ*.-+0gῌL &>5)(*OO5R &~'RJJ|f(+ &~'b ( +!  ¡Ox¢+!&1§)5% +! {# R *./+ gῌL j4

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