A molybdenum oxide reagent used for organic pollutant degradation and a reaction method thereof

A technology for organic pollutants and oxides, applied in the field of chemistry, can solve the problems of low utilization efficiency of hydrogen peroxide, time-consuming and labor-intensive treatment, and aggravated equipment corrosion, so as to shorten the treatment time, reduce the treatment cost, and reduce the effect of corrosion.

Inactive Publication Date: 2018-12-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional Fenton treatment technology has a higher oxidation treatment capacity, there are still the following problems: 1) The traditional Fenton technology requires to be carried out under relatively low acidic conditions, and the general reaction is between 2 and 4 at a pH of 2 to 4. In practical applications, if the wastewater does not meet the acidic conditions, additional acidic reagents need to be added, which will increase the cost and cause certain corrosion to the equipment.
2) In the actual use of traditional Fenton, for the actual production of active speci

Method used

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  • A molybdenum oxide reagent used for organic pollutant degradation and a reaction method thereof
  • A molybdenum oxide reagent used for organic pollutant degradation and a reaction method thereof
  • A molybdenum oxide reagent used for organic pollutant degradation and a reaction method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0051] Do the following sets of control experiments, and degrade the pollutants after feeding according to the following conditions, and measure the concentration with an ultraviolet spectrophotometer:

[0052] A. 100 mL of rhodamine B dye solution to be treated at 20 mg / L, add 30 mg of molybdenum dioxide, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0053] B. 100 mL of 20 mg / L Rhodamine B dye solution to be treated, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0054] C. 100 mL of rhodamine B dye solution to be treated at 20 mg / L, add 30 mg of molybdenum dioxide, adjust the pH to 4, and add 3 mg of ferrous sulfate heptahydrate.

[0055] D. To 100 mL of 20 mg / L rhodamine B dye solution to be treated, add 30 mg of molybdenum dioxide to adjust the pH to 4, and 4 μL of 30 wt % hydrogen peroxide.

[0056] Experimental results such as figure 1 As shown, it can be kno...

specific Embodiment 2

[0057] Step 1, add 30 mg of molybdenum dioxide to 100 mL of rhodamine B dye solution to be treated, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0058] Step 2: After step 1, stir at room temperature for 20 minutes until the pollutants are completely degraded, then centrifuge to recover MoO 2 powder and wash with water multiple times to remove surface ionic magazines.

[0059] Step 3: Use another 100 mL of 20 mg / L rhodamine B dye solution to be treated, add recovered and washed molybdenum dioxide, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0060] Step 4 Repeat steps 2 and 3 several times.

[0061] Experimental results such as figure 2 As shown, within 20 minutes, the degradation rate of organic pollutants remained above 100%, and with the increase of the number of cycles, the cocatalyst MoO 2 The speed is not reduced, and the stability is very good.

specific Embodiment 3

[0062] Do the following sets of control experiments, and degrade the pollutants after feeding according to the following conditions, and measure the concentration with an ultraviolet spectrophotometer:

[0063] A. 100 mL of rhodamine B dye solution to be treated at 20 mg / L, add 5 mg of molybdenum dioxide, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0064] B. To 100 mL of 20 mg / L Rhodamine B dye solution, add 10 mg of molybdenum dioxide to adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0065] C. 100 mL of rhodamine B dye solution to be treated at 20 mg / L, add 30 mg of molybdenum dioxide, adjust the pH to 4, add 3 mg of ferrous sulfate heptahydrate, and 4 μL of 30 wt % hydrogen peroxide.

[0066] D. 100 mL of rhodamine B dye solution to be treated at 20 mg / L, 60 mg of molybdenum dioxide was added to adjust the pH to 4, 3 mg of ferrous sulfate heptahydrate, and 4 μL ...

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Abstract

The invention relates to the field of chemistry, particularly relates to organic pollutant treatment, and more particularly relates to a molybdenum oxide reagent used for organic pollutant degradation. The reagent includes a Fenton's reagent including an iron source and hydrogen peroxide, and also includes a molybdenum oxide mixed in the Fenton's reagent as a cocatalyst of the Fenton's reagent. After the molybdenum oxide is added as the cocatalyst, the Fenton reaction efficiency and the hydrogen peroxide utilization efficiency are greatly increased, dosage of an iron salt is reduced, and the molybdenum oxide reagent has high activity even in a condition that pH is high. The molybdenum oxide reagent can greatly increase the organic wastewater treatment efficiency of a Fenton technique, reduces the treatment cost, broadens the application range and has a good application prospect.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to the treatment of organic pollutants. Background technique [0002] Fenton technology is a technology that uses a mixed solution of hydrogen peroxide and ferrous ions to degrade and oxidize many organic substances, including carboxylic acids and alcohols, into inorganic substances. It is widely used in the treatment of wastewater generated in printing and dyeing industries. . In 1893, the chemist Fenton H first discovered that the mixed solution of hydrogen peroxide plus ferrous ions has a very strong oxidizing property, which can oxidize some organic compounds such as carboxylic acids, alcohols, and esters into inorganic states. In 1964, Canadian scholar Eisenhaner applied Fenton's reagent to wastewater treatment for the first time, using Fenton's reagent to treat phenol and alkylbenzene wastewater, and the removal rate was as high as 99%. Although the traditional Fenton treatment tech...

Claims

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Application Information

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IPC IPC(8): B01J23/881C02F1/72C02F101/30
CPCB01J23/881C02F1/725C02F2101/30
Inventor 张金龙邢明阳伊秋颖董陈成刘俊杜梦梦沈斌嵇家辉胡松昌
Owner EAST CHINA UNIV OF SCI & TECH
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