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Illinois Fertilizer Conference Proceedings
January 29-31, 1996

Main Index 1996 Index Search

Table 1: Effect of Ca2+ competing for K+ in oxidized and reduced ferruginous smectite (SWa-1)spacer

Reduction Treatment
(hr)		 Solution (S)
or Clay (C) Phase

Mass
(mg)

 [Ca2+] x 10-5
(mol/L) 		[K+] x 10-5
(mol/L) 		Ca:K
(equivalent ratio)		 CEC
(meq/g)
4 S n/a 13.2 28.54 0.925 n/a
0 S n/a 12.77 26.99 0.946 n/a
4 C 22.6 11.65 31.35 0.743 1.2093
4 C 25.3 15.67 35.37 0.886 1.3183
0.33 C 20.5 9.73 32.51 0.599 1.2613
0.33 C 17.9 8.11 31.35 0.517 1.3288
0 C 20.1 15.72 7.52 4.181 0.9691
0 C 25.0 15.69 7.31 4.293 0.7744

 

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