System and method for electrocatalytic treatment of trace estrogen in reclaimed water
A technology of reclaimed water and estrogen, applied in the field of water treatment, can solve the problems of greater influence on the removal rate of trace pollutants, low catalytic activity of particle electrodes, unstable operation, etc., to achieve increased production, simple operation, and energy saving Effect
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[0051] The specific steps of the preparation method of the particle electrode 400 are as follows:
[0052] (1) Adopt the impregnation method to load the tin-antimony oxide intermediate layer 20: prepare solution A, which is a salt solution containing tin and antimony elements, which can be a kind of chloride salt, nitrate, and sulfate; Immerse in solution A, and mix thoroughly in a shaker for a period of time, then dry in an oven at 80-105°C. Repeat step (1) once for a second load;
[0053] (2) Using the sol-gel method to support the titanium oxide coating 10: prepare solution B and solution C, the solution B is a tetrabutyl titanate solution, and the solution C is a mixed solution of acetic acid, water and ethanol; While stirring solution B, add solution C dropwise to form transparent gel solution D; immerse the activated carbon containing tin antimony oxide intermediate layer prepared in step (1) in gel solution D, and place it in a fume hood Until the gel ages and cracks;...
Embodiment 1
[0056] Example 1: Preparation of multiple composite catalyst particle electrodes
[0057] The preparation steps are as follows:
[0058] (1) Activated carbon carrier pretreatment: Use deionized water to rinse the activated carbon several times until there is no floating carbon powder in the water, and then soak it in dilute methanol solution to remove organic impurities on the surface of activated carbon; soak it in hot alkali solution to remove oily impurities on the surface of activated carbon ;Finally, rinse with deionized water several times until the pH of the deionized water does not change much, then dry in an oven at 80-105°C.
[0059] (2) Tin antimony oxide intermediate layer loading: preparation solution A, the solution A is SnCl 4 and SbCl 3 ethanol solution, the concentration ratio of tin and antimony is 10:1, a certain mass of pretreated activated carbon carrier is immersed in a certain volume of solution A, placed in a constant temperature shaker and fully mixe...
Embodiment 2
[0061] Example 2: The treatment effect of the three-dimensional electrode treatment system proposed by the present invention on trace estrogen in reclaimed water
[0062] Using the loaded composite catalyst activated carbon prepared in Example 1 as the particle electrode, the diamond-doped boron electrode as the anode, and the stainless steel as the cathode, a continuous-flow three-dimensional electrode system was constructed to treat the estrogens containing five estrogens (E1, E2, E3, EE2 and BPA). The regenerated water was treated, and the initial concentration of estrogen in the regenerated water was respectively 1000 μg / L. When the applied current density is 2.0mA / cm 2 , the aeration rate is 0, and when the hydraulic retention time (5-20min) is changed, the removal rate of the system for the five estrogens in the reclaimed water is shown in the attached Figure 5shown. The electrolysis process was sampled for 4 hours, and samples were taken at certain time intervals to ...
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