Photocatalysis oxidation method for treating waste water of anthraquinone dye

Abstract

The invention relates to the photocatalysis and oxidation treatment of anthraquinone dye wastewater, in particular to a photocatalysis and oxidation method for treating the anthraquinone dye wastewater. The method comprises the following steps that: firstly, acid or alkali is used to adjust the PH value of the anthraquinone dye wastewater to less than or equal to 12; the anthraquinone dye wastewater is added with a catalyst, passed through with air by one time and subject to the simulation of photodegradation in an illumination incubator under the sunlight; everyday, the solution is illuminated for 14 to 16 hours at a temperature of between 20 and 25 DEG C with an illumination intensity of between 5, 000 and 5, 800 Lux and then enters a dark state for 8 to 10 hours with a temperature kept between 16 and 20 DEG C; the catalyst consists of a composition A and a composition B; a weight ratio of the composition A to the composition B is 0.01 to 2; and a weight ratio of the catalyst to dye is 0.01 to 2. The method adopts natural light for carrying out the treatment on the anthraquinone dye wastewater and has good discoloring effect and a high removing rate of total organic carbon; and the method also has the advantages of high catalyst activation, low cost, low treatment cost, simple operation, etc.

Description

technical field

[0001] The invention relates to photocatalytic oxidation treatment of anthraquinone dye wastewater, in particular to a new method for natural photocatalytic oxidation degradation of anthraquinone dye wastewater. Background technique

[0002] Wastewater from dye production and consumption industries has caused great environmental pollution. In our country, more than 1.6×10 9 m 3 of dye wastewater is discharged into the environment without proper treatment Ma, J.; Song, W.; Chen, C.; Ma, W.; Zhao, J.; The discharge of these colored wastewater not only causes visual pollution, but also inhibits the growth of aquatic organisms Vautier, M.Guillard, C.; Herrmann, J.M.J.Catal. 2001, 201, 46-59. Therefore, the removal of dyes from water has become a hotspot in the field of environmental research. Weber, E.J.; Adams, R.L Environ.Sci.Technol.1995, 29, 1163-1170. Anthraquinone dyes are another large class of dyes besides azo dyes. Due to their stable anthraquinone...

Examples

Embodiment 1

[0022] First use HCl or NaOH to adjust the pH value of the dye wastewater so that 1≤pH≤12, then add 10mL of 50-150mg / L anthraquinone dye AB80 aqueous solution into a 25mL glass test tube, then add catalyst into the system, and blow 15mL at a time air, sealed, and placed in an intelligent light incubator for photodegradation, the light intensity is 5320-5520Lux, and the light time is 1-30 days. The removal rate of AB80 after the reaction is shown in Table 1.

[0023] Table 1 The results of photocatalytic oxidation treatment of AB80 dye wastewater

[0024] dye concentration

[0025] 100mol%K 2 SO 4

[0026] Mole % is the ratio of the amount of catalyst to the amount of dye.

Embodiment 2

[0028] According to the operation steps of the above-mentioned Example 1, the pH value of the anthraquinone dye AB80 wastewater was adjusted to 2.6 with HCl, and then 30 mL of 50-150 mg / L dye aqueous solution was added to a 50 mL glass test tube, and 20 mL of air was blown in at one time, followed by adding 80 mol% FeCl 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of catalyst to the dyestuff), sealed, put into an intelligent light incubator for light, light intensity 5320-5520Lux, light 1-30 days, TOC removal rate is shown in Table 2.

[0029] Table 2 TOC removal results of photocatalytic oxidation treatment of AB80 dye wastewater

[0030] dye concentration

Embodiment 3

[0032]According to the operation steps of the above-mentioned Example 1, the pH value of the anthraquinone dye wastewater was adjusted to 2.6 with HCl, and then 10 mL of 50 mg / L anthraquinone dye aqueous solution was added to a 25 mL glass test tube, and 15 mL of air was blown in at one time, and then 80 mol% FeCl was added 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of catalyst to the dyestuff), sealed, put into an intelligent light incubator for light, light intensity 5320-5520Lux, light 1-30 days, the results are shown in Table 3.

[0033] Table 3 The results of photocatalytic oxidation treatment of other anthraquinone dye wastewater

[0034]

[0035] Acid Blue 225

technical field

[0001] The invention relates to photocatalytic oxidation treatment of anthraquinone dye wastewater, in particular to a new method for natural photocatalytic oxidation degradation of anthraquinone dye wastewater. Background technique

[0002] Wastewater from dye production and consumption industries has caused great environmental pollution. In our country, more than 1.6×10 9 m 3 of dye wastewater is discharged into the environment without proper treatment Ma, J.; Song, W.; Chen, C.; Ma, W.; Zhao, J.; The discharge of these colored wastewater not only causes visual pollution, but also inhibits the growth of aquatic organisms Vautier, M.Guillard, C.; Herrmann, J.M.J.Catal. 2001, 201, 46-59. Therefore, the removal of dyes from water has become a hotspot in the field of environmental research. Weber, E.J.; Adams, R.L Environ.Sci.Technol.1995, 29, 1163-1170. Anthraquinone dyes are another large class of dyes besides azo dyes. Due to their stable anthraquinone...

Examples

Embodiment 1

[0022] First use HCl or NaOH to adjust the pH value of the dye wastewater so that 1≤pH≤12, then add 10mL of 50-150mg / L anthraquinone dye AB80 aqueous solution into a 25mL glass test tube, then add catalyst into the system, and blow 15mL at a time air, sealed, and placed in an intelligent light incubator for photodegradation, the light intensity is 5320-5520Lux, and the light time is 1-30 days. The removal rate of AB80 after the reaction is shown in Table 1.

[0023] Table 1 The results of photocatalytic oxidation treatment of AB80 dye wastewater

[0024] dye concentration

[0025] 100mol%K 2 SO 4

[0026] Mole % is the ratio of the amount of catalyst to the amount of dye.

Embodiment 2

[0028] According to the operation steps of the above-mentioned Example 1, the pH value of the anthraquinone dye AB80 wastewater was adjusted to 2.6 with HCl, and then 30 mL of 50-150 mg / L dye aqueous solution was added to a 50 mL glass test tube, and 20 mL of air was blown in at one time, followed by adding 80 mol% FeCl 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of catalyst to the dyestuff), sealed, put into an intelligent light incubator for light, light intensity 5320-5520Lux, light 1-30 days, TOC removal rate is shown in Table 2.

[0029] Table 2 TOC removal results of photocatalytic oxidation treatment of AB80 dye wastewater

[0030] dye concentration

Embodiment 3

[0032]According to the operation steps of the above-mentioned Example 1, the pH value of the anthraquinone dye wastewater was adjusted to 2.6 with HCl, and then 10 mL of 50 mg / L anthraquinone dye aqueous solution was added to a 25 mL glass test tube, and 15 mL of air was blown in at one time, and then 80 mol% FeCl was added 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of catalyst to the dyestuff), sealed, put into an intelligent light incubator for light, light intensity 5320-5520Lux, light 1-30 days, the results are shown in Table 3.

[0033] Table 3 The results of photocatalytic oxidation treatment of other anthraquinone dye wastewater

[0034]

[0035] Acid Blue 225

Images