Table 1 The effects of different metal ions on the hydrogen production systems
From: Feasibility of biohydrogen production from industrial wastes using defined microbial co-culture
Metal ions (0.50 mol/L) | H1 medium (mL/h -1 .L -1 ) | H2 medium (mL/h -1 .L -1 ) | Overall hydrogen production (%) |
|---|---|---|---|
Controls | 17.80 ± 1.51 | 15.90 ± 0.66 | 100.0 |
BaCl2 · 2H2O | 3.74 ± 1.04 | 2.07 ± 0.36 | 17.21 |
CaCl2 | 6.23 ± 0.25 | 4.29 ± 1.03 | 31.16 |
CoCl2 · 6H2O | 2.14 ± 0.99 | 1.113 ± 1.04 | 9.50 |
FeCl2 · 4H2O | 21.54 ± 1.02 | 13.67 ± 0.76 | 104.45 |
FeCl3 · 4H2O | 14.06 ± 1.09 | 18.44 ± 0.58 | 96.44 |
CuSO4 · 5H2O | 14.77 ± 1.17 | 10.65 ± 1.97 | 75.37 |
KCl | 18.69 ± 0.23 | 15.90 ± 1.54 | 102.67 |
MnSO4 · H2O | 13.53 ± 0.76 | 10.02 ± 0.15 | 69.73 |
MgSO4 · 7H2O | 21.18 ± 0.16 | 20.19 ± 0.83 | 122.85 |
NH4Cl | 12.64 ± 1.88 | 10.81 ± 1.96 | 69.73 |
ZnSO4 · 7H2O | 16.20 ± 1.09 | 12.08 ± 1.03 | 83.98 |