Abstract
The point of zero charge and surface acidity constants of zinc oxide were determined over the temperature range 293–323 K. Both the point of zero charge (pzc) and the surface acidity constants (pKa1 and pKa2) were found to decrease with increasing temperature. The values of the dissociation constants (pKa1 and pKa2) determined from the Henderson-Hasselbach equation agreed very well with those determined using the Gaines-Thomas equation. The thermodynamic parameters ΔH0 and ΔS0 for the processes were also evaluated.
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References
1.
Ainsworth
C.C.
Girvin
D.C.
Zachara
J.M.
Smith
S.C.
(1989 ) J. Am. Soil Sci. Soc. 53 , 411 .
2.
Akratopuleu
K.C.
Vordonis
L.
Lycourghiotis
L.
(1986 ) J. Chem. Soc., Faraday Trans. 182 , 3697 .
3.
Alberto
E.R.
Miguel
A.B.
Alberto
J.G.M.
(1983 ) J. Colloid Interface Sci . 91 , 560 .
4.
Berube
Y.G.
DeBruyn
P.L.
(1968 ) J. Colloid Interface Sci . 27 , 305 .
5.
Blesa
M.
Maroto
A.
Regazzoni
A.
(1990 ) J. Colloid Interface Sci . 140 , 287 .
6.
Blesa
M.
Figliolia
N.M.
Maroto
A.J.G.
Regazzoni
A.E.
(1984 ) J. Colloid Interface Sci . 101 , 410 .
7.
Carroll
D.
(1958 ) Geochim. Cosmochim. Acta 14 , 1 .
8.
Davis
J.A.
James
R.O.
Leckie
J.O.
(1978 ) J. Colloid Interface Sci . 63 , 480 .
9.
Filipek
L.H.
Chao
T.T.
Carpenter
R.H.
(1982 ) Chem. Geol. 33 , 45 .
10.
Gaines
G.I.
Jr.
Thomas
H.C.
(1953 ) J. Chem. Phys. 21 , 714 .
11.
Gibbs
R.J.
(1973 ) Science 180 , 73 .
12.
Gibbs
R.J.
(1977 ) Bull. Geol. Soc. Am. 88 , 829 .
13.
Goldberg
E.D.
(1954 ) J. Geol. 62 , 249 .
14.
Heath
G.R.
Dymond
J.
(1977 ) Bull. Geol. Soc. Am. 88 , 723 .
15.
Leyvaramos
R.
Fuentesrubio
L.
Guerrerocoronado
R.M.
Mendozabarron
J.
(1995 ) J. Chem. Technol. Biotechnol. 62 , 64 .
16.
Ludwing
C.
Schindler
P.W.
(1995 ) J. Colloid Interface Sci . 169 , 284 .
17.
Machesky
M.L.
Jacobs
P.F.
(1991 ) Colloids Surf . 53 , 297 .
18.
Marinsky
J.A.
(1996 ) J. Phys. Chem. 100 , 1858 .
19.
Marker
K.
Joanna
M.
Jerzy
S.
(1994 ) J. Colloid Interface Sci . 164 , 280 .
20.
Mustafa
S.
Haq
I.
Hussain
S.Y.
(1984 ) J. Chem. Soc. Pak. 11 , 200 .
21.
Papelis
C.
(1995 ) Environ. Sci. Technol. 29 , 1526 .
22.
Parfitt
R.I.
(1978 ) Adv. Agron. 30 , 1 .
23.
Parks
G.A.
DeBruyn
P.L.
(1962 ) J. Phys. Chem. 66 , 967 .
24.
Parks
J.
Regalbuto
R.
(1995 ) J. Colloid Interface Sci . 175 , 239 .
25.
Regazzoni
A.E.
Blesa
M.A.
(1983 ) J. Colloid Interface Sci . 91 , 560 .
26.
Regdon
I.
Kiraly
Z.
Dekany
I.
Lagaly
G.
(1994 ) Colloid Polym. Sci. 272 , 1129 .
27.
Roe
H.Y.
Talat
S.
Gabrielle
D.
(1974 ) J. Colloid Interface Sci . 70 , 483 .
28.
Schoonen
M.A.A.
(1994 ) Geochim. Cosmochim. Acta 58 , 2845 .
29.
Spanos
N.
Slavov
S.
Kordulis
C.
Lycoughiotis
A.
(1994 ) Langmuir 10 , 3134 .
30.
Subramanian
V.
(1976 ) Can. Mineral. 14 , 32 .
31.
Summer
K.E.
(1964 ) Clays Clay Miner . 5 , 218 .
32.
Tewari
P.H.
Campbell
A.B.
(1976 ) J. Colloid Interface Sci . 55 , 531 .
33.
Zhang
Q.
Xu
Z.
Finch
J.A.
(1995 ) J. Colloid Interface Sci . 169 , 414 .