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Method for degrading organic matters in water by activated persulfate coupling system

A technology for activating persulfate and persulfate, which is applied in chemical instruments and methods, water pollutants, chemical/physical processes, etc., can solve problems such as catalyst recovery difficulties and environmental secondary pollution, and achieve enhanced organic degradation effects, The effect of low metal ion dissolution and improved photocatalytic activity

Inactive Publication Date: 2017-07-18
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of method that activates persulfate coupling system to degrade organic matter in water, the purpose is to solve the problem of catalyst (metal ion Co) in homogeneous persulfate activation system 2+ ) is difficult to recycle and is likely to cause secondary pollution to the environment. At the same time, coupling photocatalysis enhances the degradation effect of organic matter

Method used

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  • Method for degrading organic matters in water by activated persulfate coupling system
  • Method for degrading organic matters in water by activated persulfate coupling system
  • Method for degrading organic matters in water by activated persulfate coupling system

Examples

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Effect test

Embodiment 1

[0025] (1) Thoroughly mix 25mL tetrabutyl titanate and 32.2mL absolute ethanol. Take another 32.2mL of absolute ethanol, adjust the pH to 2-3 with hydrochloric acid, add it to the above-mentioned mixture of tetrabutyl titanate and absolute ethanol, and stir it for 30 minutes to make it fully mixed to obtain TiO 2 Sol.

[0026] (2) Take 80mL TiO 2 After mixing the sol with 12g phenol, add it to 100mL n-heptane dispersion medium, add dropwise 16mL formaldehyde under full stirring, heat up to 60-70°C for reaction, filter the mixture after about 1.5h, and wash it repeatedly with ethanol, Obtain a milky white polymer, which is TiO 2 Composite microspheres are dried and roasted at 500°C for 2 hours to decompose the polymer to obtain TiO 2 porous microspheres.

[0027] (3) Prepare 50mL of Co(NO 3 ) 2 ·6H 2 O and 0.125mol / L Fe(NO 3 ) 3 9H 2 O precursor mixed solution, 1g TiO 2 Immerse it in it, stir it electromagnetically for 5 hours, then stir it in a water bath at 80°C an...

Embodiment 2

[0030] (1) Thoroughly mix 12.5 mL of tetrabutyl titanate and 16.1 mL of absolute ethanol. Take another 16.1mL of absolute ethanol, adjust the pH to 2-3 with hydrochloric acid, add it to the above-mentioned mixture of tetrabutyl titanate and absolute ethanol, and stir it for 30 minutes to make it fully mixed to obtain TiO 2 Sol.

[0031] (2) Take 40mL TiO 2 After mixing the sol with 6g of phenol, add it to 50mL of n-heptane dispersion medium, add 8mL of formaldehyde dropwise under sufficient stirring, heat up to 60-70°C for reaction, filter the mixed solution after about 1.5h, and wash it repeatedly with ethanol, The milky white polymer is TiO 2 Composite microspheres are dried and roasted at 500°C for 2 hours to decompose the polymer to obtain TiO2 porous microspheres.

[0032] (3) Prepare 25 mL of Co(NO 3 ) 2 ·6H 2 O and 0.125mol / L Fe(NO 3 ) 3 9H 2 O precursor mixed solution, 0.5g TiO 2 Immerse it in it, stir it electromagnetically for 5 hours, then stir it in a wat...

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Abstract

The invention discloses a method for degrading organic matters in water by an activated persulfate coupling system, and is realized through the following steps: firstly, preparing TiO2 porous microspheres; then, preparing FeCo / TiO2; finally, fully mixing the FeCo / TiO2 with aqueous solution which contains organic matters, adding the persulfate, meanwhile, irradiating by ultraviolet rays, and activating to generate SO4<->. and.OH under the synergistic effect of the FeCo / TiO2 and ultraviolet light so as to degrade most parts of organic pollutants in wastewater. The method has a simple processing technology, the organic wastewater can be subjected to up-to-standard emission only through one-step reaction, cobalt ion and iron ion dissolution rates are extremely low, environment pollution is lightened, organic matter degradation efficiency in the wastewater is higher under acidic, neutral and alkaline conditions, and the stable treatment of the organic wastewater under a situation of various pH (Potential of Hydrogen) values is realized.

Description

technical field [0001] The present invention relates to a kind of FeCo / TiO 2 An activated persulfate coupling system for treating organic wastewater belongs to the field of environmental protection. Background technique [0002] With the extensive use of various detergents, pesticides, and chemical fertilizers, as well as the increase in the discharge of domestic sewage and industrial wastewater, water pollution has been aggravated. Organic matter, especially toxic, harmful and refractory organic pollutants has become a difficult point in water treatment. Based on SO 4 ﹣ ·The advanced oxidation technology is a new technology developed rapidly in recent years, which has attracted widespread attention because of its high-efficiency treatment of refractory organic matter and low environmental pollution. Compared with the active substance hydroxyl radical ( OH) of the traditional advanced oxidation technology, SO 4 ﹣ It is a highly active free radical, SO 4 ﹣ ·(E 0 = 2....

Claims

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Application Information

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IPC IPC(8): B01J23/75C02F1/32C02F101/30
CPCB01J23/002B01J23/75B01J2523/00C02F1/32C02F2101/30B01J2523/47B01J2523/842B01J2523/845
Inventor 程爱华行瑶
Owner XIAN UNIV OF SCI & TECH
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