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Catalytic method for generating sulfate radicals and active oxygen species as well as advanced oxidation method of organic pollutants difficult to biodegrade

A technology of free radicals and active oxygen, applied in the direction of water pollutants, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as refractory biodegradable organic pollutants, and achieve improved removal Efficiency, low heavy metal dissolution rate, and the effect of solving high heavy metal dissolution

Active Publication Date: 2018-10-19
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a catalytic method for generating sulfate radicals and active oxygen species and an advanced oxidation method for refractory organic pollutants, so as to solve the problem of refractory organic pollutants in the prior art

Method used

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  • Catalytic method for generating sulfate radicals and active oxygen species as well as advanced oxidation method of organic pollutants difficult to biodegrade
  • Catalytic method for generating sulfate radicals and active oxygen species as well as advanced oxidation method of organic pollutants difficult to biodegrade
  • Catalytic method for generating sulfate radicals and active oxygen species as well as advanced oxidation method of organic pollutants difficult to biodegrade

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Embodiment 1

[0057] This embodiment proposes a catalytic method for generating sulfate radicals and active oxygen species, using CoOOH as a catalyst, comprising the following steps:

[0058] Synthesis of CoOOH:

[0059] Step S211, take Co(NO 3 ) 2 ·6H 2 O is dissolved in water to obtain a second solution with a concentration of 0.15 to 0.2 mol / L;

[0060] Step S212, dissolving NaOH in water to prepare a 1mol / L NaOH solution;

[0061] Step S213, according to the volume ratio of 1:1, the NaOH solution is added dropwise to the second solution, the supernatant turns from rose red to transparent, the reaction is complete, and the third solution is obtained;

[0062] Step S214, heating the third solution in a water bath at a constant temperature of 60°C, pouring out the supernatant to obtain a fourth solution;

[0063] In step S215, the fourth solution is placed on a water bath, and H is added dropwise with a molar concentration of 30% while heating and stirring. 2 o 2 , and then in a con...

Embodiment 2

[0070] The present embodiment proposes a kind of catalytic method that produces sulfate radical and reactive oxygen species, and described catalytic method adopts NiOOH as catalyst, comprises the following steps:

[0071] Synthesis of NiOOH:

[0072] Step S220, the NiSO 4 Add solid to water to prepare 0.15~0.3mol / L NiSO 4 solution;

[0073] Step S221, according to the volume ratio of 1:1, the concentration is 0.15~0.3mol / LK 2 S 2 o 8 solution was dropped into the NiSO 4 solution, the sixth solution is obtained;

[0074] Step S222, slowly adding ammonia water to the sixth solution to adjust the pH to pH=7-9;

[0075] Step S223, standing the sixth solution at 35°C for 72 hours to obtain a seventh solution;

[0076] Step S224, centrifuging the seventh solution after standing, washing and drying the obtained solid;

[0077] Step S225, adding the NaOH solid into the NaClO solution with a concentration of 0.15-0.3 mol / L according to the mass fraction of 1%-3% to obtain an e...

Embodiment 3

[0082] This embodiment proposes a kind of catalytic method that produces sulfate radical and reactive oxygen species, adopts MnOOH as catalyst, comprises the following steps:

[0083] Synthesis of MnOOH:

[0084] Step S231, the MnSO 4 ·H 2 O is added in the NaOH solution of 0.1mol / L;

[0085] Step S232, adding 30% to 50% H of the total solution mass to the solution obtained in step S231 2 o 2 and mix well;

[0086] Step S233, adding the solution obtained in step S232 into the reaction kettle, heating to 150°C and keeping it for 15h;

[0087] Step S234, naturally cooling the product in the reactor to room temperature, washing with water until the pH of the solid surface is neutral;

[0088] In step S235, the obtained solid is placed in a vacuum drying oven, and vacuum-dried at 50° C. for 4 hours to obtain manganese oxyhydroxide.

[0089] Complete catalysis:

[0090] Step S131, grinding the solid material of manganese oxyhydroxide into fine particles to obtain manganese ...

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Abstract

The invention provides a catalytic method for generating sulfate radicals and active oxygen species as well as an advanced oxidation method of organic pollutants difficult to biodegrade. The problemsof low degradation efficiency of organic pollutants and high cost in the prior art are solved. According to the catalytic method for generating sulfate radicals and active oxygen species, a transitionmetal oxyhydroxide-based material serves as a catalyst, and the sulfate radicals, hydroxyl radicals, superoxide radicals and singlet oxygen non-radicals are generated, so that the organic pollutantsdifficult to biodegrade are efficiently oxidized. The transition metal oxyhydroxide-based material serves as the catalyst, the activation efficiency of perosulfate is improved and various radicals andactive oxygen species are generated, so that the oxidative degradation rate of the organic pollutants is increased; and the catalyst has a stable structure, is low in heavy metal dissolution rate inthe catalytic process, avoids secondary pollution, and can be widely applied to treatment of industrial production waste water, treatment of domestic sewage, purification treatment of polluted underground water and surface water as well as treatment of polluted soil.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and pollutant prevention and control, and in particular relates to a catalytic method for simultaneously generating sulfate radicals and active oxygen species and an advanced oxidation method for refractory biodegradable organic pollutants. Background technique [0002] With the development and progress of society, while people's economic living standards have been rapidly improved, environmental problems have become more and more serious, such as global warming, ozone layer destruction, acid rain, fresh water resource crisis, energy shortage, land desertification and garbage disasters , toxic chemical pollution, etc., some have threatened human existence. [0003] Refractory biodegradable organic pollutant pollution is a kind of toxic chemical pollution. With the development of industrial and agricultural production, biodegradable organic pollutants have become an indispensable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/745B01J23/75B01J23/755B01J23/34C02F101/30
CPCB01J23/34B01J23/745B01J23/75B01J23/755C02F1/725C02F2101/30
Inventor 吕聪贺丹李易丞张其慧杨雪娇冯威
Owner JILIN UNIV
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