Method for treating organic pollutants through steel slag-oxalic acid photo Fenton

A technology of organic pollutants and organic dyes, applied in the field of steel slag-oxalic acid photo-Fenton treatment of organic pollutants, can solve the problems of no degradation of nitrobenzene, no photo-Fenton reaction, etc., and achieve the effect of great promotion value

Active Publication Date: 2013-03-27
苏州尼普环境科技有限公司
5 Cites 15 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, this method does not involve the photo-...
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Abstract

The present invention discloses a method for degradation of organic pollutant by using steel slag and photocatalysis, wherein the method is a method for treating organic pollutants through steel slag-oxalic acid photo Fenton. The method comprises: grinding steel slag to a certain particle size, placing the grinded steel slag in an oxalic acid solution with a certain concentration, placing an organic dye in a mixing system of the steel slag and the oxalic acid to form a reaction system of the steel slag, the oxalic acid and the organic dye, and placing the reaction system under an environment of sunlight or ultraviolet-visible light radiation to carry out photo Fenton degradation of the organic dye. The method has characteristics of simpleness, easy performing, low energy consumption, and easy generalization application, wherein the steel slag can be recycled.

Application Domain

Water/sewage treatment by irradiationEnergy based wastewater treatment +1

Technology Topic

Photocatalytic degradationOXALIC ACID DIHYDRATE +10

Examples

  • Experimental program(3)

Example Embodiment

[0015] Example 1: Photo Fenton degradation of methylene blue by steel slag
[0016] 1. Grind the steel slag to a particle size of 3.0mm-5.0mm, weigh 0.50g and place it in a 100mL beaker.
[0017] 2. Add 50 mL of methylene blue dye at a concentration of 5 mg/L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0 mmol/L to obtain a mixed solution containing steel slag, oxalic acid and methylene blue dye.
[0018] 3. With a 300W UV-visible lamp as the light source, the decolorization rate of methylene blue reached 99% after 120 minutes of irradiation.
[0019] 4. Filter the steel slag and the fading reaction solution, then place the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can make the methylene blue fade continuously, and the fading rate of the methylene blue is all within 6 cycles. More than 90.

Example Embodiment

[0020] Example 2: Photo Fenton degradation of Congo red by steel slag
[0021] 1. Grind the steel slag to a particle size of 3.0mm-5.0mm, weigh 0.50g and place it in a 100mL beaker.
[0022] 2. Add 50 mL of Congo red dye with a concentration of 20 mg/L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0 mmol/L to obtain a mixed solution containing steel slag, oxalic acid and Congo red dye.
[0023] 3. With a 300W UV-visible lamp as the light source, the decolorization rate of Congo red reached 97% after 120 minutes of irradiation.
[0024] 4. Filter the steel slag and the fading reaction solution, then put the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can make the Congo red fade continuously, cycle 6 times, the fading rate of the Congo red is 90.0% the above.

Example Embodiment

[0025] Example 3: Photo Fenton degradation of malachite green by steel slag
[0026] 1. Grind the steel slag to a particle size of 3.0mm-5.0mm, weigh 0.50g and place it in a 100mL beaker.
[0027] 2. Add 50 mL of malachite dye with a concentration of 5 mg/L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0 mmol/L to obtain a mixed solution containing steel slag, oxalic acid and malachite dye.
[0028] 3. With a 300W UV-visible lamp as the light source, the decolorization rate of malachite green reached 98% after 60 minutes of irradiation.
[0029] 4. Filter the steel slag and the fading reaction solution, then place the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can continuously fade the malachite green, cycle 6 times, the fading rate of malachite green is all More than 96.0%.
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PUM

PropertyMeasurementUnit
Concentration5.0mg/l
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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