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Construction of a nano-copper manganate spinel catalytic membrane reactor and its application in water treatment

A catalytic membrane reactor, nano-copper manganate technology, applied in the direction of oxidation water/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve the problems of catalytic activity decline, membrane fouling, unfavorable separation, etc., to prevent membrane fouling The effect formed

Active Publication Date: 2018-11-09
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these common catalysts with high catalytic activity also have some limitations:
[0004] (1) Most of the catalysts are powdery, although they have a large specific surface area and reactivity, they are unfavorable for realizing their separation in water;
[0005] (2) The cost is high, and the catalyst has certain selectivity, so it is difficult to meet the actual demand;
[0006] (3) Due to the coexistence of various pollutants in natural water bodies, the adsorption of some substances and their oxidized intermediates causes the catalytic activity to decline or lose
However, membrane fouling occurs during membrane filtration

Method used

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  • Construction of a nano-copper manganate spinel catalytic membrane reactor and its application in water treatment
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Embodiment approach

[0021] The construction method of the catalyst membrane reactor loaded with nano-copper manganate spinel will be described below in conjunction with specific embodiments, so as to further understand the invention. The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

specific Embodiment approach 1

[0022] Specific implementation mode one: nano copper manganate spinel (CuMn 2 o 4 ) The construction method of catalytic membrane reactor can be realized through the following steps:

[0023] (1) Accurately weigh 40.1893g of citric acid monohydrate and dissolve it in 800mL of deionized water to completely dissolve the solute to obtain a clear solution;

[0024] (2) 10.2681gCu(NO 3 ) 2 ·3H 2 O and 10.2 mL concentration of wt.50% Mn(NO 3 ) 2 Add it to the above solution, and at the same time, the mixed solution is continuously stirred at 600rpm / min for 24 hours to completely dissolve the solute to obtain a clear solution;

[0025] (3) The above solution is heated and stirred at 150°C, and the heating is stopped after the sol is formed;

[0026] (4) Soak the ceramic membrane in the above-mentioned sol solution and let it stand for 60 minutes;

[0027] (5) Place the once-loaded ceramic membrane in a high-temperature muffle furnace for burning, the burning temperature is 75...

specific Embodiment approach 2

[0030] Specific embodiment two: the difference between this embodiment and specific embodiment one is that 10.2681gCu(NO 3 ) 2 ·3H 2 O can be replaced by 8.4851gCu(CH 3 COO) 2 ·H 2 O, other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to an advanced water treatment technique for pollution removal through heterogeneous catalytic ozonation. Directed at the disadvantage that a conventional powdery catalyst is unfavorable for separation and easy to inactivate in a water phase, a construction method for a novel nanometer copper manganate spinel catalytic membrane reactor is provided. The construction method aims to combine heterogeneous ozonation with a ceramic membrane filtration technique, and utilizes active components (CuMn2O4) on a ceramic membrane catalytic layer to catalyze ozone so as to generate -OH with high oxidation capacity, wherein organic compounds can directly react with molecular ozone or react with -OH generated by ozone decomposition; meanwhile, an interception function of the ceramic membrane can assist to reinforce removal of 2-hydroxyl-4-methoxybenzophenone in water. In addition, ozone can react with humic acid and natural organic matters (NOMs) in the water, so the formation of membrane pollution is effectively controlled. A nanometer copper manganate spinel catalytic membrane provided by the invention has the following advantages: preparation process is simple; operation is convenient; a catalyst on membrane surface is uniformly distributed, so mass transfer efficiency is improved; and the membrane has potential application prospects in treatment of drinking water or wastewater containing pharmaceutical and personal care products (PPCPs).

Description

technical field [0001] The invention relates to the construction of a nano-copper manganate spinel catalytic membrane reactor and its application in catalytic ozone oxidation and pollution removal technology. Background technique [0002] In recent years, new pollutants with "three-caused" effects or endocrine disrupting effects——pharmaceuticals and personal care products (PPCPs) have been continuously detected and found in the surface water environment, with concentrations ranging from ng / L to μg / L. Most of the PPCPs are discharged into the sewage in the original or converted form and enter the sewage treatment plant with the sewage. The representative substances of the PPCPs detected include antimicrobial drugs, antipyretic, analgesic and anti-inflammatory drugs, estrogen and other drugs (such as blood lipids, drugs, etc.) Antiepileptic drugs, tranquilizers, contrast agents, etc.) and fragrances commonly used in cosmetics. Since conventional water treatment and sewage tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/44
Inventor 齐飞郭杨
Owner BEIJING FORESTRY UNIVERSITY
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