Method for degrading formaldehyde by electrochemical/advanced oxidation coupling system based on titanium-based iridium dioxide anode
A technology of iridium dioxide and advanced oxidation, applied in chemical instruments and methods, special compound water treatment, water/sewage multi-stage treatment, etc., can solve the problems of low efficiency of formaldehyde removal, formaldehyde mineralization, secondary pollution, etc., to achieve High formaldehyde absorption efficiency, simple process flow, no secondary pollution effect
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Embodiment 1
[0027] (1) Weigh 1g conductive carbon black, 5g graphite carbon, mix with absolute ethanol, add polytetrafluoroethylene emulsion drop by drop under the condition of ultrasonic stirring, and then ultrasonically stir for 10min; Stir for 2 hours, add absolute ethanol to make it into a micelle, and roll it continuously on a roller press until it is pressed into a thin sheet to obtain a graphite-carbon black composite rolled electrode;
[0028] (2) pack this electrode into the cathode cell of the electrochemical system, use titanium-based iridium dioxide as the anode, apply 3V direct current, and use the Na of 50mM concentration SO solution as the electrolyte, the cathode solution of the BES of the synthetic hydrogen peroxide by 1: The ratio of 1 reacts with 20mg / L, 16mg / L, and 12mg / L formaldehyde solutions, and adjusts the pH of the solution to 10±0.5.
[0029] The experimental results show that: according to step 1) the graphite-carbon black composite roll-pressed electrode prepa...
Embodiment 2
[0031] The method for synthesizing hydrogen peroxide based on an electrochemical method and being used for degrading formaldehyde, the steps are as follows:
[0032] (1) Weigh 1g of conductive carbon black, 5g of graphite carbon, mix with absolute ethanol, add polytetrafluoroethylene emulsion drop by drop under the condition of ultrasonic stirring, and then ultrasonically stir for 10min; Stir for 2 hours, add absolute ethanol to make it into a micelle, and roll it continuously on a roller press until it is pressed into a thin sheet to obtain a graphite-carbon black composite rolled electrode;
[0033] (2) pack this electrode into the cathode cell of the electrochemical system, use titanium-based iridium dioxide as the anode, apply 3V direct current, and use the Na of 50mM concentration SO solution as the electrolyte, the cathode solution of the BES of the synthetic hydrogen peroxide by 1: The ratio of 1 reacts with 20mg / L, 16mg / L, and 12mg / L formaldehyde solutions, and adjusts...
Embodiment 3
[0036] The method for synthesizing hydrogen peroxide based on an electrochemical method and being used for degrading formaldehyde, the steps are as follows:
[0037] (1) Weigh 1g conductive carbon black, 5g graphite carbon, mix with absolute ethanol, add polytetrafluoroethylene emulsion drop by drop under the condition of ultrasonic stirring, and then ultrasonically stir for 10min; Stir for 1.5h, add absolute ethanol to make it into a micelle, and roll it continuously on a roller press until it is pressed into a thin sheet to obtain a graphite-carbon black composite rolled electrode;
[0038] (2) pack this electrode into the cathode cell of the electrochemical system, use titanium-based iridium dioxide as the anode, apply 3V DC, and use the Na2SO4 solution of 50mM concentration as the electrolyte, and synthesize the cathode solution of the BES of hydrogen peroxide by 1: The ratio of 1 reacts with 20mg / L, 16mg / L, and 12mg / L formaldehyde solutions, and adjusts the pH of the solu...
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