Method of using silver ferrite nanomaterial to catalyze persulfate to treat organic wastewater

A technology for organic wastewater and nanomaterials, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc. The effect of stability, efficient degradation, and simple operation

Active Publication Date: 2019-04-05
湖北省工程咨询股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese invention patent with publication number CN 103880090A discloses a kind of AgFeO 2 The preparation method and application of nanoparticle gas-sensing materials, but the preparation method has the following disadvantages: 1. Seal the mixed suspension and place it in a stainless steel reaction kettle for 12-24 hours at 160-200 ° C, and the reaction conditions of liquid high temperature and high pressure Vigorous, long reaction time, extremely high requirements on equipment, high production cost; 2. The AgFeO 2 The material is irradiated with cobalt 60 source gamma rays at a dose of 10-1000kGy, and the operation risk is high, which is not conducive to mass production; 3. The diameter of the obtained nanoparticles is 50-100nm, and the size is relatively large, which will lead to effect, which in turn affects its performance

Method used

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  • Method of using silver ferrite nanomaterial to catalyze persulfate to treat organic wastewater
  • Method of using silver ferrite nanomaterial to catalyze persulfate to treat organic wastewater
  • Method of using silver ferrite nanomaterial to catalyze persulfate to treat organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] AgFeO 2 material preparation

[0032] (1) Accurately weigh 16.16g Fe(NO 3 ) 3 9H 2 O and 6.8g AgNO 3 , each added to 50mL of distilled water, prepared to obtain a concentration of 0.8mol / L Fe(NO 3 ) 3 9H 2 O and 0.8mol / L AgNO 3 solution, the AgNO 3 solution dropwise to Fe(NO 3 ) 3 in solution;

[0033] (2) Use a NaOH solution with a concentration of 6 mol / L to adjust the pH=10, stir for 30 minutes, and after standing still, wash the precipitate with water, dry and grind it to obtain a solid powder;

[0034] (3) Dry the solid powder obtained in step (2) at 100°C for 3 hours to obtain AgFeO 2 nanomaterials;

[0035] AgFeO 2 Material application

[0036] (4) AgFeO 2 Nanomaterials and potassium peroxymonosulfonate (PS) are mixed into organic wastewater, and the concentration of potassium peroxymonosulfonate in organic wastewater is 0.2g / L, AgFeO 2The concentration of nanomaterials in organic wastewater is 1g / L, the pollutant in organic wastewater is rhodami...

Embodiment 2

[0038] AgFeO 2 material preparation

[0039] (1) Accurately weigh 10.1g Fe(NO 3 ) 3 9H 2 O and 4.25g AgNO 3 , each added to 50mL of distilled water, prepared to obtain a concentration of 0.5mol / L Fe(NO 3 ) 3 9H 2 O and 0.5mol / L AgNO 3 solution, the AgNO 3 solution dropwise to Fe(NO 3 ) 3 in solution;

[0040] (2) Use a NaOH solution with a concentration of 7 mol / L to adjust the pH to 10.5, stir for 1 hour, and after standing still, wash the precipitate with water, dry and grind it to obtain a solid powder;

[0041] (3) Dry the solid powder at 100°C for 3 hours to obtain AgFeO 2 nanomaterials;

[0042] AgFeO 2 Material application

[0043] (4) AgFeO 2 Nanomaterials and potassium peroxymonosulfonate are mixed into organic wastewater, and the concentration of potassium peroxymonosulfonate in organic wastewater is 0.3g / L, AgFeO 2 The concentration of nanomaterials in organic wastewater is 0.5g / L, the pollutant in organic wastewater is rhodamine B (RhB), the initia...

Embodiment 3

[0045] AgFeO 2 material preparation

[0046] (1) Accurately weigh 12.12g Fe(NO 3 ) 3 9H 2 O and 5.1 g AgNO 3 , each added to 50mL of distilled water, prepared to obtain a concentration of 0.6mol / L Fe(NO 3 ) 3 9H 2 O and 0.6mol / L AgNO 3 solution, the AgNO 3 solution dropwise to Fe(NO 3 ) 3 in solution;

[0047] (2) Use a NaOH solution with a concentration of 8 mol / L to adjust the pH to 12, stir for 1.5 hours, and after standing still, wash the precipitate with water, dry and grind it to obtain a solid powder;

[0048] (3) Dry the solid powder at 100°C for 3 hours to obtain AgFeO 2 Nanomaterials; AgFeO 2 Material application

[0049] (4) AgFeO 2 Nanomaterials and potassium peroxymonosulfonate are mixed into organic wastewater, and the concentration of potassium peroxymonosulfonate in organic wastewater is 0.2g / L, AgFeO 2 The concentration of nanomaterials in organic wastewater is 2g / L, the pollutant in organic wastewater is rhodamine B (RhB), the initial concentr...

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Abstract

The invention discloses a method of using a AgFeO2 nanomaterial to catalyze persulfate to treat organic wastewater. The method is characterized by including: (1), dropwise adding a AgNO3 solution intoa Fe(NO3)3 9H2O solution; (2), adding alkali liquid to adjust pH to 10-12, stirring for 0.5-2h, standing, and subjecting precipitate to centrifugal water washing and drying and grinding to obtain solid powder; (3), drying the solid powder at 100-150 DEG C for 2-4h to obtain the AgFeO2 nanomaterial; (4), mixing the AgFeO2 nanomaterial with potassium peroxomonosulfate, and putting into the organicwastewater. After the AgFeO2 nanomaterial is put into wastewater, recycling of a catalyst can be realized through simple solid-liquid separation, and the catalytic reaction process does not need external energy and simple in operation. Efficient degradation of organic dye and phenolic wastewater can be realized within a wide pH range.

Description

technical field [0001] The present invention relates to the field of catalyst new material technology and environmental purification technology, specifically refers to a kind of AgFeO 2 Nanomaterial-catalyzed method for persulfate treatment of organic wastewater. Background technique [0002] The rapid expansion of industrial production has led to the generation of a large amount of refractory industrial wastewater. The existence of organic pollutants in water has brought serious threats to human health and ecological environment. Although H 2 o 2 The traditional advanced oxidation technology represented by AO can realize the rapid degradation of most organic pollutants in water. However, in practical applications, there are also harsh pH requirements, H 2 o 2 Self-instability and the generated hydroxyl radicals (·OH) have short life spans in water bodies. Therefore, it is necessary to find a new and efficient advanced oxidation technology to achieve efficient and saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/72C02F101/30C02F101/34
CPCB01J23/8906C02F1/725C02F2101/308C02F2101/345
Inventor 王继全秦茜袁念念易程程周婕邵婷黄鹏黄莹
Owner 湖北省工程咨询股份有限公司
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