Journal qt’theKorwn ChemicalSocie~y 2000, Vd. 44, No. 4
Prkrtedin the Republicof Korea
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Surface Complexation Modeling of Ni(II), Co(II), and Sr(II) Adsorption on Amorphous Alumina
Yeong Jae Park*, Kyoung Kyun F%rk, .Moo Yu1 Sub, Soo Kyoung Yoon, Kwang Soon Choi, Kwang YongJee. and Won Ho Klm
Korea Atomic Energy Reseamh hrstitute, Naclear Chemistry Research leang bejon .$OS-(W, K.w-eu (Received May 15, 2000)
52 Q1. 9XJ51 “]+7J~(0. 1 Wl]~j -W% 9-?u1+I1 % Ni(II), Co(II), Sr(lI) Q GOP] -W 7j
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~.++ ~~~~ ~~ r+ ~1E@+Ej 3E@~~ EE&& ~+j-++ ~ +$+9 ~~+11 Ul~ Z+Q; &+&+~
% ~’j~}$$~. %% A3171+-Co(II)>Ni(II)Xk(II) +S2Z z&@-%9+ CS(I)+ S%O1 ~1~1 $%i,&l-.%-+ pH +jq Co(~)Sj- Nj(II~ ~~~ ~++~] 7~%] @ +j@@. +x] ~}~~.
ABSTRACT. Adsorption behaviors of Ni(IIj, Co(II), Sr(II), and C%(I)ions were investigated on amorphous alumina with varying pH at three different metal ion concentrations under the condition of 0.1 M ionic strength.
With increasing metal ion concentration, the percmrtagc of adsorption decrcascd and the adsorption edge was shifted to a higher pH value. The adsorption data obtained using the metal ion concentration of 1.0 X 104 M were quantitatively analyzed by surface complexation modeling and the values of intrinsic adsorption constant were determined. The. adsorption afi%@ of metal ions to the alumina surface decreased in the order Co(IIj>
Ni(l[)> Sr@) and Cs(l) ions were uot adsorbed. The species of Ni(Jl ) und Co(II) ions adsorbed at high pH (>8) were found to be in hydrolyzed forms.
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I
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Fig.
1.
Percentage of adsorbed Ni(ll) on amorphous alumina as a function of’pH.I
I= 0.1 MMN%~ 80- C’+
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5 –+– ,@xlc-3M I
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m ..---0--- !j,OxlC-4M
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= 40-
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Fig. 2. Percentage of adsorbed CO(U)on amorphous alumina as a function of pH.
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m
z — “. 0x10-3M
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~ 60- ---..4... ~.o~10-4M
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m
E 40- 1= 0.1 M Nat4C+ #@ :’
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g
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Fig. 3. Percentage of adsorbed Sr(lI) on amorphous alumina as a function of PH.
n
❑
I =0.1 M NaN~
MT=1.0x10-4M
— co
---4.-. ~,
—0– s’ ,.
,,,
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pH
Fig. 4. Percentage of adsorbed Metal(II) ion on amorphous alumina as a function of pH in the multi-component system.
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Fi,q.6.Surface conrplcxadon modeling of Co(II) adsorption on amorphous alumina. The 1incs and circles represent model calculations and cxpairncntal dafi] respectively.
.’:=,
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Bolt, G. H., J. Co[loki Iruerjiace Sci, 1987, 116, 511.
6. Park, Y. J.: Jung, K. H.; Park, K. K,, J. Co//oid lnrei=
face Sci., 1995, 171, 205.
7. Park, Y. J.; Jung, K. H,; Park, K, K., J. Colloid /nrer- ,fuce .ki., 1995, 172,447.
8. Benjamin, M. M.; Leckie, J. O., Envinm. SCi. TechtroL, 1982, 16, 162.
9.Westall,J. C., FITEQ~ A Program+for Determination of Chemical Equilibrium Constarus @m Experimental Data. User’sGuide Version 1.2; Repurt no. 82-01; (legon Stak University: Corvallis, OR, 1982,
10. Westall, J, C. FITEQL A Program for Determination oj”Chemical Equilibrium Constants j}om Experimental Data. Y’ersiun2.0; Report no. 82-02: Oregon State Uni- versity: Corvallis, OR, 1982.
11. Schenck, C. V,: Dillard, J. G.; Murray, J. W., J. Colloid Inteface Sci., 1983, 95, 398.
12. Park, Y. J.; Sub, M, Y,; Park, K. K.; Kim, W. H,, to be published.
13. James, R. O.; Healy, T. W., J. Colloid Inte)face Sci., 1972, 40, 65.
14. Ludwig, C.; Schindler, P. W., J. CoUoid lnterjtice Sci., 1995, 169, 284
15. Zhang, Q.; Xu, Z.; Finch, J. A., J. Colloid Inte@ce Sci., 1995, /75, 61.
16. Katz, L, E,; Hayes, K. F., 1 Colioid Interface Sci., 1995, 170.491,
17. Agashe, K. B.; Regalbuto, J. R., J. Colloid Intet,@ce Sci., 1997, 185, 174.
18. Bae, C. F.; Mcsmer, R. E., The Hydrolysis of Calions:
Wiley: New York, 1976; p 246 for Ni(lJ), p 241 for Co(II), and p 103 for Sr(ll).
19. Brummer, G. W.; Gerth, J.; Tiller, K. G., ,Soi/ .Sci, 1988, 39, 37.
Journalof the Korean ChemicalSociety
