Method for catalyzing ozone to degrade organic pollutants

A technology for the degradation of organic pollutants and ozone, which is applied in the direction of water pollutants, chemical instruments and methods, and water treatment of special compounds, to achieve good mineralization ability and excellent catalytic activity of ozone

Pending Publication Date: 2021-07-30
TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although CuO-CeO 2 Composite materials have been well applied in the fields of three-way catalysis of automobile exhaust and CO oxidation in hydrogen-rich gas, showing excellent catalytic a...

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  • Method for catalyzing ozone to degrade organic pollutants
  • Method for catalyzing ozone to degrade organic pollutants
  • Method for catalyzing ozone to degrade organic pollutants

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] A method for catalytic ozone degradation of organic pollutants, comprising the steps of:

[0033] 1. Prepare reagent materials

[0034] Ce(NO3)3·6H2O, copper nitrate solution, glycerin, urea, oxalic acid, tert-butanol (TBA), absolute ethanol, diammonium hydrogen phosphate, superoxide dismutase (SOD), furfuryl alcohol (FFA), methanol ( Chromatographically pure), the reagents used in the experiment are all analytically pure and above grades, without further purification, the solution is prepared with deionized water;

[0035]...

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Abstract

The invention discloses a method for catalyzing ozone to degrade organic pollutants.The method comprises the following steps: synthesizing a copper-cerium binary composite catalyst (CuO-CeO2) by a hydrothermal-roasting method, and characterizing by an X-ray diffractometer (XRD), a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Oxalic acid is used as a model compound, CuO-CeO2 is used for carrying out a continuous flow catalytic ozonation test, the removal rate of the oxalic acid reaches 97.66% after 25 min and is far higher than the removal rate of systems such as O3 (2.66%), CuO/O3 (7.38%) and CeO2/O3 (5.47%) on the oxalic acid, and the mineralization rate of the oxalic acid is 95.21%; the optimal reaction conditions of the CuO-CeO2/O3 system are as follows: the ozone mass concentration is 30mg/L, the catalyst dosage is 0.20 g/L, and the pH value of the solution is 7; and more than 90% of oxalic acid can still be removed after the CuO-CeO2 is recycled for five times, so that the CuO-CeO2 has excellent stability and reusability. In the process of catalyzing O3 by CuO-CeO2, hydroxyl radicals are generated but do not play a leading role, and singlet oxygen is a main active oxidation species causing degradation of oxalic acid.

Description

technical field [0001] The invention relates to the technical field of organic matter degradation experiments, in particular to a method for catalyzing ozone to degrade organic pollutants. Background technique [0002] Catalytic ozonation technology mainly relies on catalysts to increase the amount of active free radicals generated by ozone. The process is simple, easy to operate, and low investment cost. It is an advanced oxidation technology with good application prospects. Most of the commonly used catalytic ozonation techniques rely on hydroxyl radicals ( · OH) to remove refractory organic matter, many metal oxides (such as MnO 2 、Co 3 o 4 , Fe 2 o 3 、TiO 2 ) are loaded onto carbon-based materials (activated carbon, biochar, graphene, etc.) or inorganic minerals (volcanic rock, montmorillonite, alumina, ceramic gravel, etc.) as catalysts, which usually rely on catalytic ozone to generate · OH dominates the removal of organic matter. In fact, · OH reacts slower w...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N30/02G01N30/74G01N21/31C02F1/78C02F1/72C02F101/34
CPCG01N31/16G01N30/02G01N30/74G01N21/3103C02F1/78C02F1/725C02F2101/34C02F2305/023G01N30/88
Inventor 李振东常方孙艳梅
Owner TIANJIN RES INST FOR WATER TRANSPORT ENG M O T
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