Table 1.
Experimental results for the batch electrolysis experiments with different anodes and cathodes (current = 90 mA)
| NO. | Cathode | Anode | CA (mg L−1) (ini-fin) | ζ (μS cm−1) (ini-fin) | pH (ini-fin) | Chloride (mg L−1) | Cl− mass recovery (%) | FDEa (%) | C mass recovery (%) (0.5h-fin)b | K (×10−3 L h −1) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Copper foam | Cast iron | 39.9-<0.1 | 862-1368 | 7.7-11.3 | 32.7 | 80.2 | >99.7c | 90-25 | 212.5±3.8 |
| 2 | Copper foam | MMO | 38.9-16.7 | 853-840 | 7.7-7.1 | 16.2 | 89.2 | 57.2 | 102-70 | NA |
| 3 | Copper foam | PbO2 | 40.0-16.5 | 853-911 | 7.6-6.9 | 11.7 | 74.3 | 61.0 | 104-71 | NA |
|
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| 4 | Copper plate | Cast iron | 38.6-4.3 | 845-970 | 7.6-10.1 | 30.5 | 80.3 | 88.8 | 90-23 | 64.6± 2.2 |
| 5 | Pure iron plate | Cast iron | 39.7-7.1 | 850-866 | 7.5-9.7 | 19.6 | 72.1 | 82.1 | 89-33 | 54.4± 2.2 |
| 6 | Iron foam | Cast iron | 40.2-1.7 | 863-950 | 7.7-10.1 | 19.5 | 57.7 | 95.6 | 94-20 | 90.1± 1.6 |
| 7 | Nickle foam | Cast iron | 40.3-10.1 | 854-858 | 7.7-9.5 | 13.2 | 63.2 | 74.9 | 91-36 | 39.5± 1.6 |
| 8 | Vitreous carbon foam | Cast iron | 40.4-7.1 | 855-1393 | 7.6-11.8 | 22.8 | 80.6 | 82.4 | 86-30 | 54.1± 3.7 |
a
FDE(Final degradation Efficiency)= (Ca(0)−Ca(5h)/Ca(0)) ×100%
b
Carbon mass recovery only considered the carbon mass contribution from the spiked TCE.
c
>99.7% means the concentration of aqueous TCE was below the detection limitation of the analytic method (0.1 mg L−1) after 5-hours electrolysis. 0.1 mg L−1 was used as final TCE concentration for FDE calculation. Same for other silimar expressions in this table.