Table 2 H2O2 decomposition rate constants (ktot) and corresponding half-life times determined by fitting the H2O2 concentration data presented in Fig. 4 to the first order rate equation: \( {Rate}_{\left({H}_2{O}_2\right)}=-\frac{d\left[{H}_2{O}_2\right]}{dt}={k}_{tot}\left[{H}_2{O}_2\right] \)
Experiment Nr. | Treatment | First order rate constant ktot [h− 1] | R2 | t1/2 [h] |
|---|---|---|---|---|
1 | MOPS pristine fibers | 6.2*10−3 | 0.998 | 112 |
2 | MOPS blank-altered fibers | 4.2*10−3 | 0.996 | 165 |
3 | MOPS DFOB-altered fibers | 2.5*10−3 | 0.956 | 277 |
4 | MOPS DFOB-altered fibers + 0 μmol g− 1 Fe | 2.5*10− 3 | 0.944 | 277 |
5 | MOPS DFOB-altered fibers + 3 μmol g− 1 Fe | 2.7*10− 3 | 0.992 | 257 |
6 | MOPS DFOB-altered fibers + 30 μmol g− 1 Fe | 3.5*10− 3 | 0.982 | 198 |
7 | MOPS DFOB-altered fibers + 300 μmol g− 1 Fe | 5.3*10− 3 | 0.986 | 131 |
8 | MOPS buffer (no fibers) panel a & c of Fig. 4 | 1.2*10− 3 | 0.931 | 578 |
9 | MOPS blank-altered fibers + 0 μmol g− 1 Fe | 4.2*10− 3 | 0.979 | 165 |
10 | MOPS blank-altered fibers + 3 μmol g− 1 Fe | 4.2*10− 3 | 0.983 | 165 |
11 | MOPS blank-altered fibers + 30 μmol g− 1 Fe | 4.9*10− 3 | 0.988 | 142 |
12 | MOPS blank-altered fibers + 300 μmol g− 1 Fe | 6.0*10− 3 | 0.995 | 116 |
13 | MOPS buffer (no fibers) panel d of Fig. 4 | 1.4*10− 3 | 0.995 | 495 |
14 | NaOH pristine fibers | 46.7*10− 3 | 0.936 | 14.8 |
15 | NaOH blank-altered fibers | 41.5*10−3 | 0.995 | 16.7 |
16 | NaOH (no fibers) | 1.0*10−3 | 0.772 | 693 |