Method for organic wastewater electro-fenton treatment adopting bentonite
A technology of organic wastewater and bentonite, applied in the field of environmental pollution control, can solve the problems of difficult removal of iron ions, low efficiency of pollutant removal, complicated process of bentonite loading iron catalyst, etc., and achieve the effect of saving electric energy and promoting decomposition
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Embodiment 1
[0020] Add dye orange II wastewater with a concentration of 30mg / L in the electrolytic cell, and then add dry bentonite crushed through a 100-mesh sieve. The solid-liquid mass ratio of bentonite and wastewater is 1:500, and 0.2mL of H 2 o 2 (30%, mass fraction), the anode electrode of the electrolytic cell is an iron sheet electrode, the cathode is a graphite electrode, the electrolytic cell is connected to a current of 40mA, and after every 20min, it is disconnected for 40min, and the cycle operation is continued throughout the process. Stirring speed After a total time of 3 hours, the organic matter in the wastewater was oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater was analyzed. The removal rate reached 98.7%, and the residual iron ion concentration in the wastewater was 1.4mg / L.
[0021] After the precipitated bentonite was dried at 105°C, it was used as a catalyst to treat wastewater. Add 1 g of the precipitated b...
Embodiment 2
[0025] Add dye acid red wastewater with a concentration of 25mg / L into the electrolytic cell, and then add dry bentonite crushed through a 50-mesh sieve. The solid-liquid mass ratio of bentonite and wastewater is 1:100, and 0.1mLH 2 o 2 (30%, mass fraction), the anode electrode of the electrolytic cell is an iron sheet electrode, the cathode electrode is a graphite electrode, the electrolytic cell is connected to a current of 5mA, and after every 15 minutes, it is disconnected for 30 minutes, and the cycle operation is continued throughout the process. The rotation speed is 50r / min, and after a total time of 6 hours, the organic matter in the wastewater is oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater is analyzed. The removal rate reaches 99.1%, and the residual iron ion concentration in the wastewater is 2.1mg / L.
[0026] After the precipitated bentonite was dried at 105°C, it was used as a catalyst to treat wastewate...
Embodiment 3
[0030] Add phenol wastewater with a concentration of 15 mg / L into the electrolytic cell, and then add dry bentonite crushed through a 100-mesh sieve. The solid-liquid mass ratio of bentonite and wastewater is 1:500, and 0.1 mL of H 2 o 2 (30%, mass fraction), the anode electrode of the electrolytic cell is an iron sheet electrode, the cathode electrode is a graphite electrode, the current of the electrolytic cell is 40mA, and after every 20min, it is disconnected for 40min, and the cycle operation is continued throughout the process. The rotation speed is 100r / min. After a total time of 5 hours, the organic matter in the wastewater is oxidized and degraded, precipitated and separated, and the concentration of pollutants in the wastewater is analyzed. The removal rate reaches 96.7%, and the residual iron ion concentration in the wastewater is 1.7mg / L.
[0031]After the precipitated bentonite was dried at 105°C, it was used as a catalyst to treat wastewater. Add 1 g of the preci...
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