Application of magnesium oxide-loaded ferrocobalt metal magnetic nanometer material on degrading orange colour II in wastewater

A technology of metal magnetism and nanomaterials, applied in metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, chemical instruments and methods, etc., can solve problems such as restrictions on popularization and application, and avoid secondary pollution , the preparation method is simple, and the effect of widening the applicable range of pH

Inactive Publication Date: 2011-08-24
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the need to introduce external energy (light source) to promote the degradati

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of MgO-supported cobalt-iron metal magnetic nanocatalysts:

[0024] Weigh 24.48g Mg(NO 3 ) 2 ·6H 2 O, 7.94g Co(NO 3 ) 2 ·6H 2 O, 11.02g Fe(NO 3 ) 3 9H 2 O was dissolved in 150 mL deionized water to prepare a magnesium-cobalt-iron mixed salt solution.

[0025] Another 5.78g Na 2 CO 3 Dissolve 9.6g NaOH in 150mL deionized water to prepare a mixed alkali solution, quickly pour the mixed salt solution and alkali solution into a fully back-mixed rotating liquid film reactor at room temperature, stir vigorously for 1min, and crystallize the nucleation slurry at 100°C 24h, repeated centrifugation and washing, until the sample washing was neutral, the sample was taken out and dried at 60°C for 24h and ground to obtain Mg 3.5 co 1.0Fe 1.0 -CO 3 LDHs powder. Mg 3.5 co 1.0 Fe 1.0 -CO 3 Lay the LDHs precursor on the porcelain boat and place the porcelain boat in the temperature control area of ​​the tube furnace in sequence. Firstly, the air in the f...

Embodiment 2

[0031] MgO-supported cobalt-iron metal magnetic nanocatalyst is Mg 3.5 co 1.0 Fe 1.0 -CO 3 LDHs precursors were prepared by calcination at 700 °C for 2 h: Co 1.0 Fe 1.0 / Mg 3.5 O.

[0032] Other steps are with embodiment 1

[0033] The results of the degradation time and the decolorization rate are listed in Table 2. It can be seen from Table 2 that the decolorization rate of 98.2% can be reached after 259 minutes of treatment.

[0034] Table 2. Degradation time and decolorization rate

[0035] time / min

Embodiment 3

[0037] MgO-supported cobalt-iron metal magnetic nanocatalyst is Mg 3.5 co 1.0 Fe 1.0 -CO 3 LDHs precursors were prepared by calcination at 800 °C for 2 h: Co 1.0 Fe 1.0 / Mg 3.5 O.

[0038] Other steps are with embodiment 1

[0039] The results of the degradation time and the decolorization rate are listed in Table 3. It can be seen from Table 3 that the decolorization rate of 99.1% can be reached after 259 minutes of treatment.

[0040] Table 3. Degradation time and decolorization rate

[0041] time / min

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Abstract

The invention provides an application of magnesium oxide-loaded ferrocobalt metal magnetic nanometer material on degrading orange colour II in wastewater, which is particularly applied to degrading organic pollutant orange colour II in the wastewater. The magnesium oxide-loaded ferrocobalt metal magnetic nanometer material has the chemical formula of CoxFey/MgzO and is prepared by roasting magnesium cobalt molten iron talc (MgzCoxFey(CO3)w(OH)2.mH2O) serving as a precursor at high temperature under the environment of shielding gas. At room temperature, the material and hydrogen peroxide form a heterogeneous Fenton system for processing the organic pollutant orange colour II in the wastewater when the pH is neutral, and the material has good processing effect. Compared with the traditionalFenton system, the system is characterized in that solid and liquid are easy to separate, and no new impurities are lead into the water so as to avoid secondary pollution of water quality in the water treatment process. The invention has the advantages of simple technical operation, high efficiency, low cost, wider pH applicable range and better practical application value.

Description

technical field [0001] The invention relates to the application of a magnesium oxide-supported cobalt-iron metal magnetic nanomaterial in degrading organic pollutants in wastewater Background technique [0002] With the rapid development of industry, the types and quantities of wastewater have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. People have been exploring ways to treat various industrial wastewater. The advanced wastewater treatment technologies that have been developed so far include ozone oxidation, activated carbon adsorption, membrane separation, wet oxidation, and Fenton oxidation. Among them, Fenton oxidation (H 2 o 2 / Fe 2+ ) is considered to be a method with fast reaction speed, mild reaction conditions, simple operation and convenient equipment. In the treatment of refractory industrial wastewater, the Fenton method is a technology that has been studied and applie...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F9/12B01J23/75
Inventor 王连英郑国民岳爽卢燊何静
Owner BEIJING UNIV OF CHEM TECH
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