DDTC界面的电化学机制
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2 = ZwF + ZF + ZF/S
(9)
z , , ~ ~ % % E ~ ~ ~ v B E ( s z; Z F Y J R ~ ~ S Z ) ; ) zF/s%E%B%rqm%(SZ). Z % X $ H *I%, 89s A % S > 9 \ m E + & *3it!ltG. Z % E J R @ T @ $ + U $!G,$i?l@E,+H $tG, &*3%!2BtJPBE&FJ %+R.%%+;k^-&ABXR&RE, ZF/S%$B/J\. 8i'I%%RF-,@H$@~JU%@ R,(&PA)+U Ci( %)~@#R$WB~J%,~?BIL.$;[~~,'~I :
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CI~/crn2.162 p4/crn2 ,267 ,uA/crn2, Iap2%F--4a%
Fig. 1 Volrarnrnograrns for jarnesonite elecrrode in 0 . 1 rnol/L
Na2.W4 buffer solution of pH 4 . O ar different scanning
Fig.2 Voltammograms for jamesonite electrode in 0.1 mol/L
( a e . ~ .. &
?1,2002:215)
f n t l ~ f ~ d h ~ ~ i kj j(; z% :~ $~ & [ ~ 1 . :+ t ~ )
[10]Shi M L.. 'Theory and Application of :\C Impedance Spectra[M]. Beijing : Natlonal Defense lndusrry Press, 2001 :307
9?3f f i - 2 B$ rq i & EG&G PAR 23 m
g y & G i$l u
IfF$$ERft% gj . g 9 I$! 2g % 3
Potentiostat/Galvanostat Model
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I
-
-
I
.
2
.
1
-
1
0
1
2
3
4
5
log f 1 Hz
log f I Hz
Fig. 3 E I S of jamesonite in 0 . 1 mol/L Na2S04 solutions of p H
Fig. J E I S of jamesonite in 0 . 1 mol/L N a 2 Q solutions of p H 4 . 0 containing 1 . 0 mmol/L DDTC under different potential conditions. (a)Nyquist plot, (b)Bode plot
-
diethyldithiocarbamate system [ J 1 . Chin. J . Nonferr.
Metal., 1 9 9 8 , 8 ( 2 ) :321- 326
(Ei2i&, i@rnF,3 l b n ~h-%V-6%-L6fi%b$%&4k%iB . % # & [ J ] . qa6$*Ry%. 1 9 9 8 , 8 ( 2 ) : 3 2 1 - 3 2 6 )
N a 2 Q buffer solution of pH 4 . 0 at the scanning rate of 50 mV/s
@&.% DDTC Brf.@J%@eEXx;f tLH.;k^$2 DDTC Brf.& 3 '?m&ll$H$'&%@?$Ptk% DDTC ~rf.BtJ%, B & ~ ~ % ~ B ~ & E @ : D D T C & &lB%B% r$&S@tYJ &kY-%tH+U Pd(DDTC)2 BtJ$fdB%t PM, M T f m ; % Q t t % i k E t % ' : @8i;L%BJlf%EBJ9i
s%&%@MkrVeFIMt&m8t~Ejfi6% ; ~ E ~ T ~ ~ ~ ( ~ ~ / ~ ) ~ E ~ L ~ F & T +%%w".If?$%E& 80rnass%@J 0 . 1 5 rnrn mjfi kk,@$%@ ~ ~ ~ ~ _ 4 ! l430 rnv. s f i + m t E e @ J % %~$G@L.lOrnass% J Y I ~ ~ B % IIOrnma% ~ ? ~ ~~ ~$ l s % E t % B E ( u ) Z % .JABikki#, Rl~.!!.!# @ Y J ~ ~ ~ J @i @J 6 % & mmk # $ $;fBCPE: Carbon Paste Elec( % t r t J @ & % ( E , , ) % ~ % @ @ ( u ) % % , Tq%#IF\ 15 ! trode), If?T@&f2 rnrn. k 0.10 rnol/I, Na2S04 WJ E a P %u @ J E I % , H @ $ % % ~ u @ ~ I I I Y J ~ F I %
Sc~ence Press. 1992: 70 - 138
(E@fi.iy&f%ikv~,%idE[~].dk%:Ny<ni?k, 1992:70
138) [ 5 ]Wang D Z, Gu G H, L.iu R Y . Potential adjustment flotation of gdena- lime
E l 3 % H 4 ENE%-@IEV&@Z& pH4.O DDTC %@~$~$~$T!XJft.tf;Lljfl%l%l, %+(a)%
Nyquist
B, (b)?~$'ElE@lBode $i$%@.
Nyquist
m@
#_t52%*fi+@%3fib94+1iE, i%fi%FJ@E3fiX$
-
344
(&$J?fk%%. k ! ~ i ~ ~ f % h i b kMfIl. jk,!:: %% [ .
$k,2001:307--344) [ l l ]Song
%26%%3%4 2006 6
a
Journal of Chinese Society for Corrosion and Protection
+Gui%w%~?~%%
Vo1.26 No.3 Jun. 2006
% % f F 3 ~ 3 i t % & @ E ,9 P % I T @ % @ %pH
4 . 0 containing 1 . 0 mmol/L DDTC under different potential conditions. (a)Nyquist plot, (b)Bode plot
[ 4 ]Wang D Z. New Ilevelopments of Flo~ationTheory[ M I . Beqlng:
I$& M398 $kfL'fIE$1, ?';f;L@@% ?J 5 5 HZ-10' HZ.
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"
Flotation of Sulfide Minerals"
[ C ] . Netherland:Elsevier, 1985,6:259 - 285 [ 8 ]Gu G H, Hu Y H, Qiu G Z. Electrochemistry of galena in high alkaline flotation [ J 1 . Mining and Metallurgical Engineering. 2002. 21 (1):52-55
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8 ? X :Zf;?X%
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[ 7 IHam~ltonI C, Wood R . A voltammetric study of the surface ox~dation of sulfide mlnerals[i\]. In: Forssbery K S E ( E d . ), "Developments in Minerd Processing" of
2
DDTC - - e = (DDTC) (ad,)
ຫໍສະໝຸດ Baidu
(7)
pd2' + 2DDTC- = Pd(DDTC)2(ads)
DDTC ;k^-&Erf., ~ W ~ ~ ~ I T !DDTC JB~J
(8)
M&@$%!$,2%%:-?7@, X B~ ~+ R % [ a - m , ~ I , D D T C ~ % J T $ R 3 8 Z . % i k E DDTC a%@&, 7 &TZ%%BtJ%PM%kY%HBtJ%&3II2, PatRE l?T%$P%!%83%!?l%k@FB. I! DDTC ;k^-&B$, % k @FflE3%, m&$tGF-W11BX$L2 &kY%%BtJ#& k PbS04 iX@&iif%$;(;R% @ % R @FB tYJ%R[S.81.
[ 6 IZhou Z B, Chen Y Y . Basic Theory and Princ~ple Electrode Proof cess Kinetics [ M! . Wuhan: Wuhan Un~versityPress, 1989: 225 280 (Iai$@l,
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-
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f$@i$lsE@~E&*LiX.fT SHE $@L.
3.2
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(R@TF, iV3%4$, f l ~ ~ ~ ~ . f r % P & 6 m % % @ q v ~ & 4 k % [ ~ ] . P
i ~ I @ . 2 0 0 2 . 2 1 ( 1 )52-55) : [ 9 ICha Q X . Baslc Principle of Electrode Process K ~ n e t i c s [ M ] . Beijing : Sc~ence Press. 2002: 215
(9)
z , , ~ ~ % % E ~ ~ ~ v B E ( s z; Z F Y J R ~ ~ S Z ) ; ) zF/s%E%B%rqm%(SZ). Z % X $ H *I%, 89s A % S > 9 \ m E + & *3it!ltG. Z % E J R @ T @ $ + U $!G,$i?l@E,+H $tG, &*3%!2BtJPBE&FJ %+R.%%+;k^-&ABXR&RE, ZF/S%$B/J\. 8i'I%%RF-,@H$@~JU%@ R,(&PA)+U Ci( %)~@#R$WB~J%,~?BIL.$;[~~,'~I :
%34493~ p 4 / c d . 44
2 115 CIA/crn ,227 C I ~ / c r n 2 , Iapl
%atgBE;ti{UgiEtLxIF\,
@$% Eap1%86 rnV;
1,,2%31l% 74
Fl#&t+T,FBtB@ ap2 &I@$$%
CI~/crn2.162 p4/crn2 ,267 ,uA/crn2, Iap2%F--4a%
Fig. 1 Volrarnrnograrns for jarnesonite elecrrode in 0 . 1 rnol/L
Na2.W4 buffer solution of pH 4 . O ar different scanning
Fig.2 Voltammograms for jamesonite electrode in 0.1 mol/L
( a e . ~ .. &
?1,2002:215)
f n t l ~ f ~ d h ~ ~ i kj j(; z% :~ $~ & [ ~ 1 . :+ t ~ )
[10]Shi M L.. 'Theory and Application of :\C Impedance Spectra[M]. Beijing : Natlonal Defense lndusrry Press, 2001 :307
9?3f f i - 2 B$ rq i & EG&G PAR 23 m
g y & G i$l u
IfF$$ERft% gj . g 9 I$! 2g % 3
Potentiostat/Galvanostat Model
2 7 3 ~#Fq'If;;$$ll%%H M270 %%; X$%pflE$!!! ,
B%E # :2005-08-20 I
fi%Mft:k?Ld",7:,1965
$51, W + , B @ ,i:BM%Y%'h?i%@
( U 1 / 2 ) 3 ~i , % n m z ~ a w s m w m , t ~ ~
ga
ICY8 %
%W;f;fki"%M%Ik(SZE)$.tf;L~?~,~~$.tf;L+b!J&
I
-
-
I
.
2
.
1
-
1
0
1
2
3
4
5
log f 1 Hz
log f I Hz
Fig. 3 E I S of jamesonite in 0 . 1 mol/L Na2S04 solutions of p H
Fig. J E I S of jamesonite in 0 . 1 mol/L N a 2 Q solutions of p H 4 . 0 containing 1 . 0 mmol/L DDTC under different potential conditions. (a)Nyquist plot, (b)Bode plot
-
diethyldithiocarbamate system [ J 1 . Chin. J . Nonferr.
Metal., 1 9 9 8 , 8 ( 2 ) :321- 326
(Ei2i&, i@rnF,3 l b n ~h-%V-6%-L6fi%b$%&4k%iB . % # & [ J ] . qa6$*Ry%. 1 9 9 8 , 8 ( 2 ) : 3 2 1 - 3 2 6 )
N a 2 Q buffer solution of pH 4 . 0 at the scanning rate of 50 mV/s
@&.% DDTC Brf.@J%@eEXx;f tLH.;k^$2 DDTC Brf.& 3 '?m&ll$H$'&%@?$Ptk% DDTC ~rf.BtJ%, B & ~ ~ % ~ B ~ & E @ : D D T C & &lB%B% r$&S@tYJ &kY-%tH+U Pd(DDTC)2 BtJ$fdB%t PM, M T f m ; % Q t t % i k E t % ' : @8i;L%BJlf%EBJ9i
s%&%@MkrVeFIMt&m8t~Ejfi6% ; ~ E ~ T ~ ~ ~ ( ~ ~ / ~ ) ~ E ~ L ~ F & T +%%w".If?$%E& 80rnass%@J 0 . 1 5 rnrn mjfi kk,@$%@ ~ ~ ~ ~ _ 4 ! l430 rnv. s f i + m t E e @ J % %~$G@L.lOrnass% J Y I ~ ~ B % IIOrnma% ~ ? ~ ~~ ~$ l s % E t % B E ( u ) Z % .JABikki#, Rl~.!!.!# @ Y J ~ ~ ~ J @i @J 6 % & mmk # $ $;fBCPE: Carbon Paste Elec( % t r t J @ & % ( E , , ) % ~ % @ @ ( u ) % % , Tq%#IF\ 15 ! trode), If?T@&f2 rnrn. k 0.10 rnol/I, Na2S04 WJ E a P %u @ J E I % , H @ $ % % ~ u @ ~ I I I Y J ~ F I %
Sc~ence Press. 1992: 70 - 138
(E@fi.iy&f%ikv~,%idE[~].dk%:Ny<ni?k, 1992:70
138) [ 5 ]Wang D Z, Gu G H, L.iu R Y . Potential adjustment flotation of gdena- lime
E l 3 % H 4 ENE%-@IEV&@Z& pH4.O DDTC %@~$~$~$T!XJft.tf;Lljfl%l%l, %+(a)%
Nyquist
B, (b)?~$'ElE@lBode $i$%@.
Nyquist
m@
#_t52%*fi+@%3fib94+1iE, i%fi%FJ@E3fiX$
-
344
(&$J?fk%%. k ! ~ i ~ ~ f % h i b kMfIl. jk,!:: %% [ .
$k,2001:307--344) [ l l ]Song
%26%%3%4 2006 6
a
Journal of Chinese Society for Corrosion and Protection
+Gui%w%~?~%%
Vo1.26 No.3 Jun. 2006
% % f F 3 ~ 3 i t % & @ E ,9 P % I T @ % @ %pH
4 . 0 containing 1 . 0 mmol/L DDTC under different potential conditions. (a)Nyquist plot, (b)Bode plot
[ 4 ]Wang D Z. New Ilevelopments of Flo~ationTheory[ M I . Beqlng:
I$& M398 $kfL'fIE$1, ?';f;L@@% ?J 5 5 HZ-10' HZ.
3
5 rn~,
@%zm
%Z%i+*
att%BtBm'%@~RE$1k+lFSiE El 1 E F m E l t ~ B B T I Y J ~ ~ ~ 3 z B , 5 L ~ ~
3.1
3 ' P E l & d 4 . %ElTd&E(u>%l)'f;lI% 20 r n ~ / s , 5 0 rnV/s,IOO rnV/s El$, El ;fBW apl PI @ d$'t%@iI,,, ) (
"
Flotation of Sulfide Minerals"
[ C ] . Netherland:Elsevier, 1985,6:259 - 285 [ 8 ]Gu G H, Hu Y H, Qiu G Z. Electrochemistry of galena in high alkaline flotation [ J 1 . Mining and Metallurgical Engineering. 2002. 21 (1):52-55
&&2fi%$fJ%&b%%E[~].
8 ? X :Zf;?X%
'"i*E+k, 1 9 8 9 : 2 5 2 2 8 0 )
[ 7 IHam~ltonI C, Wood R . A voltammetric study of the surface ox~dation of sulfide mlnerals[i\]. In: Forssbery K S E ( E d . ), "Developments in Minerd Processing" of
2
DDTC - - e = (DDTC) (ad,)
ຫໍສະໝຸດ Baidu
(7)
pd2' + 2DDTC- = Pd(DDTC)2(ads)
DDTC ;k^-&Erf., ~ W ~ ~ ~ I T !DDTC JB~J
(8)
M&@$%!$,2%%:-?7@, X B~ ~+ R % [ a - m , ~ I , D D T C ~ % J T $ R 3 8 Z . % i k E DDTC a%@&, 7 &TZ%%BtJ%PM%kY%HBtJ%&3II2, PatRE l?T%$P%!%83%!?l%k@FB. I! DDTC ;k^-&B$, % k @FflE3%, m&$tGF-W11BX$L2 &kY%%BtJ#& k PbS04 iX@&iif%$;(;R% @ % R @FB tYJ%R[S.81.
[ 6 IZhou Z B, Chen Y Y . Basic Theory and Princ~ple Electrode Proof cess Kinetics [ M! . Wuhan: Wuhan Un~versityPress, 1989: 225 280 (Iai$@l,
I%7%-$.
-
*2@
$@%, DDTC 3~%&3!.H X ~ I I R %%%$fi%,7K% -%7. &@K $faF.i&.%3&;fBIF\3, UkT@f2IYJ%% $tEf&%M $+ByAg/AgC1 I&@ tL $&,1 H R G H $
f$@i$lsE@~E&*LiX.fT SHE $@L.
3.2
~ ~ % ~ ~ % % f % % m EIS! J 'k V%$$R/@%#%EA@fiBtJ%~tRk(~$ iFR)+U/l\fi@BtJWR$@iUfi& tk $$R,4II&BtJ, IBtR
%@BtJmE9B/l\, FJLl&@, BI$,E$kr$P% QWR& ; 1 ; ~ [ ~ b. ~ r $.t:mBtJm;l;R%k+U&~tYJiz%, ] % % kF%%&&-Z$$27; Q,4II%%-ZBtJE53 E[101.RZ2?@$REtYJgE5/J\TEtYJgE, W4 ,RRJME% :
(R@TF, iV3%4$, f l ~ ~ ~ ~ . f r % P & 6 m % % @ q v ~ & 4 k % [ ~ ] . P
i ~ I @ . 2 0 0 2 . 2 1 ( 1 )52-55) : [ 9 ICha Q X . Baslc Principle of Electrode Process K ~ n e t i c s [ M ] . Beijing : Sc~ence Press. 2002: 215