Photocatalysis oxidation method for treating waste water of anthraquinone dye
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A technology for photocatalytic oxidation and anthraquinone dyes, which is applied in the fields of energy wastewater treatment, natural water treatment, chemical instruments and methods, etc. High removal rate, high catalyst activity, environmental friendly effect
Inactive Publication Date: 2008-12-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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But ZnO is only suitable for use under neutral and alkaline conditions, while TiO 2 Effective over a wide pH range
In general, the main problems of semiconductor photocatalysis are that photogenerated electrons and holes are easy to recombine, resu
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[0021] Example 1
[0022] First adjust the pH value of the dye wastewater with HCl or NaOH to make 1≤pH≤12, then add 10mL of 50-150mg / L anthraquinone dye AB80 aqueous solution into a 25mL glass test tube, then add the catalyst to the system, and blow 15mL at one time Air, seal, and put it into an intelligent light incubator for light degradation. The light intensity is 5320-5520 Lux, and the light time is 1-30 days. The removal rate of AB80 after the reaction is shown in Table 1.
[0023] Table 1 Results of AB80 dye wastewater treatment by photocatalytic oxidation
[0024] Dye concentration
[0025] 100mol%K 2 SO 4
[0026] The mol% is the ratio of the amount of the catalyst and the dye substance.
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[0027] Example 2
[0028] According to the operation steps of Example 1, adjust the pH value of the anthraquinone dye AB80 wastewater with HCl=2.6, and then add 30mL of 50-150mg / L dye aqueous solution into a 50mL glass test tube, blow 20mL of air at one time, and then add 80mol% FeCl 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of the catalyst to the dye), sealed, placed in an intelligent light incubator, light intensity 5320-5520 Lux, light for 1-30 days, the TOC removal rate is shown in Table 2.
[0029] Table 2 TOC removal results of AB80 dye wastewater treated by photocatalytic oxidation method
[0030] Dye concentration
Example Embodiment
[0031] Example 3
[0032]According to the operation steps of Example 1, adjust the pH value of the anthraquinone dye wastewater with HCl = 2.6, and then add 10 mL of 50 mg / L anthraquinone dye aqueous solution into a 25 mL glass test tube, blow in 15 mL of air at a time, and then add 80 mol% FeCl 3 / 80mol%NaNO 2 The catalyst (mol% is the ratio of the amount of the catalyst to the dye), sealed, placed in an intelligent light incubator, light intensity 5320-5520 Lux, light for 1-30 days, the results are shown in Table 3.
[0033] Table 3 Results of photocatalytic oxidation process for other anthraquinone dye wastewater
[0034]
[0035] Acid Blue 225
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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...
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