Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220528.doi: 10.7503/cjcu20220528
• Physical Chemistry • Previous Articles Next Articles
SUN Zhumei1,2, FU Jie1, LI Xin1, WANG Haifang1, LU Jing1, TONG Tianxing2, ZHU Mingfei2, SHU Yude2, WANG Yunyan2,3()
Received:
2022-08-10
Online:
2023-02-10
Published:
2022-11-18
Contact:
WANG Yunyan
E-mail:wyy@csu.edu.cn
Supported by:
CLC Number:
TrendMD:
SUN Zhumei, FU Jie, LI Xin, WANG Haifang, LU Jing, TONG Tianxing, ZHU Mingfei, SHU Yude, WANG Yunyan. Electrochemical Impedance Spectroscopy and Kinetics of Chloride Ion Removal by Electroadsorption[J]. Chem. J. Chinese Universities, 2023, 44(2): 20220528.
Anode potential/V | Ra/Ω | Rt/Ω | Anode potential/V | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
OCP | 42.90 | 9.60 | 1.2 | 51.26 | 4.80 |
0.9 | 46.29 | 4.40 | 1.5 | 55.63 | 3.20 |
Table 1 Relationship between Rtand Rain different anode potential
Anode potential/V | Ra/Ω | Rt/Ω | Anode potential/V | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
OCP | 42.90 | 9.60 | 1.2 | 51.26 | 4.80 |
0.9 | 46.29 | 4.40 | 1.5 | 55.63 | 3.20 |
Time/min | Ra/Ω | Rt/Ω | Time/min | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
30 | 49.15 | 3.5 | 120 | 60.59 | 5.4 |
60 | 51.05 | 4.8 | 180 | 62.39 | 4.0 |
Table 2 Relationship between Rt and Ra at different time
Time/min | Ra/Ω | Rt/Ω | Time/min | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
30 | 49.15 | 3.5 | 120 | 60.59 | 5.4 |
60 | 51.05 | 4.8 | 180 | 62.39 | 4.0 |
c(Cl-)/(g·L-1) | Ra/Ω | Rt/Ω | c(Cl-)/(g·L-1) | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
1.5 | 26.17 | 2.25 | 3.0 | 15.86 | 0.80 |
2.0 | 23.58 | 1.20 | 4.0 | 13.62 | 0.90 |
Table 3 Relationship between Rt and Ra in different initial concentrations
c(Cl-)/(g·L-1) | Ra/Ω | Rt/Ω | c(Cl-)/(g·L-1) | Ra/Ω | Rt/Ω |
---|---|---|---|---|---|
1.5 | 26.17 | 2.25 | 3.0 | 15.86 | 0.80 |
2.0 | 23.58 | 1.20 | 4.0 | 13.62 | 0.90 |
Anode potential/V | Cd/F | θ | Anode potential/V | Cd/F | θ |
---|---|---|---|---|---|
OCP(0.426) | 1.72×10-7 | 8.18×10-5 | 1.2 | 2.43×10-7 | 3.24×10-4 |
0.9 | 2.67×10-7 | 2.69×10-4 | 1.5 | 1.96×10-7 | 3.28×10-4 |
Table 4 Surface coverage of Cl- on activated carbon in different anode potentials
Anode potential/V | Cd/F | θ | Anode potential/V | Cd/F | θ |
---|---|---|---|---|---|
OCP(0.426) | 1.72×10-7 | 8.18×10-5 | 1.2 | 2.43×10-7 | 3.24×10-4 |
0.9 | 2.67×10-7 | 2.69×10-4 | 1.5 | 1.96×10-7 | 3.28×10-4 |
Anode potential/V | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
OCP(0.426) | 99531 | 63800 | 2.5×10-5 |
0.9 | 79058 | 62800 | 2.0×10-5 |
1.2 | 79058 | 62800 | 2.0×10-5 |
1.5 | 79058 | 62800 | 2.0×10-5 |
Table 5 Effect of anode potential on relaxation time
Anode potential/V | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
OCP(0.426) | 99531 | 63800 | 2.5×10-5 |
0.9 | 79058 | 62800 | 2.0×10-5 |
1.2 | 79058 | 62800 | 2.0×10-5 |
1.5 | 79058 | 62800 | 2.0×10-5 |
Time/min | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
180 | 50240 | 125304 | 4.9×10-5 |
120 | 79433 | 125300 | 5.0×10-5 |
60 | 62800 | 125300 | 3.2×10-5 |
30 | 69080 | 157747 | 3.3×10-5 |
Table 6 Effect of reaction time on relaxation time
Time/min | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
180 | 50240 | 125304 | 4.9×10-5 |
120 | 79433 | 125300 | 5.0×10-5 |
60 | 62800 | 125300 | 3.2×10-5 |
30 | 69080 | 157747 | 3.3×10-5 |
c(Cl-)/(g·L-1) | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
1.5 | 104929 | 157747 | 1.43×10-5 |
2.0 | 109900 | 157747 | 1.31×10-5 |
3.0 | 119320 | 198592 | 1.30×10-5 |
4.0 | 119320 | 250013 | 1.30×10-5 |
Table 7 Effect of initial concentration on relaxation time
c(Cl-)/(g·L-1) | ω*/(rad·s-1) | ωo/(rad·s-1) | τ/s |
---|---|---|---|
1.5 | 104929 | 157747 | 1.43×10-5 |
2.0 | 109900 | 157747 | 1.31×10-5 |
3.0 | 119320 | 198592 | 1.30×10-5 |
4.0 | 119320 | 250013 | 1.30×10-5 |
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