Method for controlling photo-Fenton processing efficiency through low molecular weight organic acid combination
A low-molecular-weight, high-efficiency technology, applied in the direction of light water/sewage treatment, energy wastewater treatment, chemical instruments and methods, etc., can solve the problems of unusable sewage treatment, etc., achieve great application potential, no secondary pollution, and reduce inhibition The effect of action
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Embodiment 1
[0015] Take five reaction vessels, add 10 μmol / L rhodamine B, 1000 μmol / L malonic acid and 100 μmol / L ferric dye wastewater to each of them, add 0 μmol / L oxalic acid to reaction vessel 1, and add 10 μmol / L oxalic acid, add 100 μmol / L oxalic acid to reaction vessel 3, add 500 μmol / L oxalic acid to reaction vessel 4, add 1000 μmol / L oxalic acid to reaction vessel 5, and adjust the pH of the solution in the reaction vessel to 3. The reaction results are shown in Table 1 below:
[0016] Table 1 Rhodamine B degradation effect under different oxalic acid concentrations
[0017]
[0018] When there is no external low molecular weight organic acid, malonic acid can react with ferric iron, thereby inhibiting the degradation of rhodamine B. Table 1 shows that when oxalic acid is not added, the removal rate of Rhodamine B within 30 min is 0. When oxalic acid was added, the removal rate of rhodamine B changed significantly, and with the increase of oxalic acid concentration, the remo...
Embodiment 2
[0020] Take five reaction vessels, add 10 μmol / L rhodamine B, 1000 μmol / L malonic acid and 100 μmol / L ferric dye wastewater to each of them, add 0 μmol / L citric acid to reaction vessel 1, and add 0 μmol / L citric acid to reaction vessel 2 Add 10 μmol / L citric acid, add 100 μmol / L citric acid to reaction vessel 3, add 500 μmol / L citric acid to reaction vessel 4, add 1000 μmol / L citric acid to reaction vessel 5, and adjust the pH of the solution in the reaction vessel for 3. The reaction results are shown in Table 2 below:
[0021] Table 2 Rhodamine B degradation effect under different citric acid concentrations
[0022]
[0023] When there is no external low molecular weight organic acid, malonic acid can react with ferric iron, thereby inhibiting the degradation of rhodamine B. Table 2 shows that when citric acid is not added, the removal rate of Rhodamine B within 30min is 0. When citric acid was added, the removal rate of rhodamine B changed, and with the increase of ci...
Embodiment 3
[0025] Take five reaction vessels, add 10 μmol / L rhodamine B, 1000 μmol / L malonic acid and 100 μmol / L ferric dye wastewater to each of them, add 0 μmol / L tartaric acid to reaction vessel 1, and add 10 μmol / L tartaric acid, add 100 μmol / L tartaric acid in reaction vessel 3, add 500 μmol / L tartaric acid in reaction vessel 4, add 1000 μmol / L tartaric acid in reaction vessel 5, the solution pH in the reaction vessel is all adjusted to 3. The reaction results are shown in Table 3 below:
[0026] Table 3 Rhodamine B degradation effect under different tartaric acid concentrations
[0027]
[0028] When there is no external low molecular weight organic acid, malonic acid can react with ferric iron, thereby inhibiting the degradation of rhodamine B. Table 3 shows that when tartaric acid is not added, the removal rate of Rhodamine B within 30min is 0. When tartaric acid was added, the removal rate of rhodamine B changed, and with the increase of tartaric acid concentration, the rem...
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