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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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not involve the photo-Fenton reaction and does not degrade nitrobenzene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Steel slag is to the light Fenton degradation of methylene blue

[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 50mL of methylene blue dye with a concentration of 5mg / L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0mmol / L to obtain a mixed solution containing steel slag, oxalic acid and methylene blue dye.

[0018] 3. Using a 300W UV-Vis lamp as the light source, the decolorization rate of methylene blue reached 99% after irradiating for 120 minutes.

[0019] 4. Filter the steel slag and the faded reaction solution, then put the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can make the methylene blue fade continuously, cycle 6 times, the fading rate of the methylene blue is at More than 90.

Embodiment 2

[0020] Embodiment 2: Steel slag is to the photo-Fenton degradation of Congo red

[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 50mL of Congo red dye with a concentration of 20mg / L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0mmol / L to obtain a mixed solution containing steel slag, oxalic acid and Congo red dye.

[0023] 3. With a 300W UV-Vis lamp as the light source, the decolorization rate of Congo Red reached 97% after irradiating for 120 minutes.

[0024] 4. Filter the steel slag and the faded reaction solution, then put the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can make Congo red fade continuously, cycle 6 times, and the fading rate of Congo red is 90.0% above.

Embodiment 3

[0025] Embodiment 3: steel slag is to the light Fenton degradation of malachite green

[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 50mL of malachite dye with a concentration of 5mg / L to the beaker containing steel slag, and then add oxalic acid to make the concentration 1.0mmol / L to obtain a mixed solution containing steel slag, oxalic acid and malachite dye.

[0028] 3. With a 300W UV-Vis 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 faded reaction solution, then place the steel slag in a 100mL beaker, repeat steps 2 and 3, the steel slag can make the malachite green fade continuously, cycle 6 times, the fading rate of the malachite green is at More than 96.0%.

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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.

Description

technical field [0001] The invention relates to the fields of water pollution treatment and steel scrap slag reuse, in particular to a steel slag-oxalic acid light-fenton method for treating organic pollutants. [0002] Background technique [0003] In 2010, the total output of crude steel in my country was 630 million tons, and the amount of steel slag discharged was about 15%. The annual output of steel slag in my country was nearly 100 million tons. The accumulation of these steel slags not only takes up a lot of land, but also pollutes the environment. How to use steel slag to turn environmental pollutants into useful resources is an urgent problem we need to solve. At present, my country's steel slag is mainly used in construction materials, agricultural micro-fertilizers, and recovery of heavy metals and phosphorus, and its utilization rate only accounts for 25% of the output of steel slag. There is also a large amount of steel slag that needs to find a way out. ...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/30C02F1/72
CPCY02W10/37
Inventor 刘守清邵强张毅
Owner 苏州尼普环境科技有限公司
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