Method utilizing small-molecule diketone to serve as optical active agent for oxidation treatment of dye waste water
A technology of dye wastewater and photoactive agent, which is applied in oxidation water/sewage treatment, light water/sewage treatment, textile industry wastewater treatment, etc., can solve the problems of large consumption of reagents, poor reaction selectivity, low decolorization efficiency, etc. Efficient and fast decolorization effect
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[0026] Example 1:
[0027] The dye-containing wastewater is filtered to remove the suspended matter; then 25 ml of 2,3-butanedione aqueous solution containing 0.2 mM Orange II and 1 mM is put into a quartz test tube with an inner diameter of 2 cm 1-a ,Put 25 ml of 0.2 mM Orange II and 1 mM 2,5-hexanedione aqueous solution into a quartz test tube with an inner diameter of 2 cm 1-b , Mix 25 ml containing 0.2 mM Orange II and 1 mM H 2 O 2 The aqueous solution is filled into a quartz test tube with an inner diameter of 2 cm 1-c, Place the quartz test tube parallel to the 300 W medium pressure mercury lamp 2 Placed in the axial direction, mercury lamp 2 Place in the cooling water jacket 3 The quartz test tube is away from the mercury lamp 2 The distance is 6 cm. Turn on the mercury lamp 2 Preheating for 5 minutes, the irradiated light intensity received by the quartz test tube is 4 mW / cm at 365 nm 2 , Remove the mercury lamp 2 Hood between quartz test tube 4 , Quartz test tube around me...
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[0028] Example 2:
[0029] The irradiation device and the irradiation conditions are the same as in Example 1, except that 2,3-butanedione, 2,5-hexanedione and H 2 O 2 The concentration is 0.5mM, to the quartz test tube 1-a, 1-b Add 1 mM 1,4-cyclohexanedione and 1,4-benzoquinone (also known as cyclohexa-2,5-diene-2,4-dione) respectively, and after irradiation for 1h 1-a, 1-b There is no significant decrease in the absorbance of the solution at 484nm.
[0030] This example shows that not all diketone compounds can promote dye decolorization, that is, the small molecule diketone involved in this patent has certain structural characteristics.
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[0031] Example 3:
[0032] The irradiation device and the irradiation conditions are the same as in Example 1, except that 2,3-butanedione, 2,5-hexanedione and H 2 O 2 The concentration is 0.5mM, to the quartz test tube 1-a , 1-b and 1-c Respectively add 0.5 mM ethanol, quartz test tube 1-a with 1-b( UV / Diketone System ) The decolorization rate of the solution remains unchanged, and the quartz test tube 1-c ( UV / H 2 O 2 Control group ) The decolorization rate of the solution was reduced by 32%.
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