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Methods for preparing wave absorbing catalyst and for degrading organic wastewater

A technology of organic wastewater and catalysts, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. It can solve the problems of inability to be reused many times, high cost of catalysts, low strength of activated carbon, etc., and achieve good microwave Absorption performance, good catalytic activity, simple method effect

Inactive Publication Date: 2016-07-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst can effectively remove organic matter in water, but the strength of activated carbon is low, it is easy to cause secondary pollution, and cannot be reused many times, and the price of manganese is expensive, which makes the cost of the catalyst high

Method used

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  • Methods for preparing wave absorbing catalyst and for degrading organic wastewater
  • Methods for preparing wave absorbing catalyst and for degrading organic wastewater
  • Methods for preparing wave absorbing catalyst and for degrading organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The method for microwave-assisted degradation of organic waste water comprises the following steps:

[0038] (1) The zero-valent iron catalyst loaded on carbon silicon tubes further includes the following steps:

[0039] (1-1) Pretreatment: Put the carbon silicon tube into a 5% nitric acid solution and ultrasonically for 30 minutes, take out the carbon silicon tube, wash it with deionized water and dry it.

[0040] (1-2) Put the pretreated carbon-silicon tube into a ferrous sulfate solution with a concentration of 0.2mol / L, take it out after 5 hours, and then use direct current for electrodeposition. Electrolyte: 200mL ferrous sulfate solution, pH=2~4; cathode: silicon carbide profile, anode: iron sheet; current 1A; electrodeposition time 10min. The zero-valent transition metal catalyst supported on the silicon carbide profile is obtained. For the convenience of storage, the prepared catalyst can be vacuum-dried at 45° C.

[0041] (2) Add 24g of catalyst to 100mL of n...

Embodiment 2

[0044] The method for microwave-assisted degradation of organic waste water comprises the following steps:

[0045] (1) The preparation of carbon silicon rod-supported zero-valent iron catalyst further includes the following steps:

[0046] (1-1) Pretreatment: put the carbon silicon rod into a 1% nitric acid solution and ultrasonically for 40 minutes, take out the carbon silicon rod, wash it with deionized water and dry it.

[0047] (1-2) Put the pretreated carbon-silicon tube into a ferrous sulfate solution with a concentration of 0.4mol / L, take it out after 5 hours, and then use direct current for electrodeposition. Electrolyte: 200mL ferrous sulfate solution, pH=2~4; cathode: silicon carbide profile, anode: iron sheet; current 1A; electrodeposition time 10min. The zero-valent transition metal catalyst supported on the silicon carbide profile is obtained. For the convenience of storage, the prepared catalyst can be vacuum-dried at 45° C.

[0048] (2) Add 16g of catalyst to...

Embodiment 3

[0051] The method for microwave-assisted degradation of organic waste water comprises the following steps:

[0052] (1) The preparation of carbon silicon tube supported zero-valent iron catalyst further includes the following steps:

[0053] (1-1) Pretreatment: Put the carbon silicon tube into a 3% nitric acid solution and ultrasonically for 60 minutes, take out the carbon silicon tube, wash it with deionized water and dry it.

[0054] (1-2) Put the pretreated carbon-silicon tube into the ferrous sulfate solution with a concentration of 0.3mol / L, take it out after 5 hours, and then use direct current for electrodeposition. Electrolyte: 200mL ferrous sulfate solution, pH=2~4; cathode: silicon carbide profile, anode: iron sheet; current 1A; electrodeposition time 10min. The zero-valent transition metal catalyst supported on the silicon carbide profile is obtained. For the convenience of storage, the prepared catalyst can be vacuum-dried at 45° C.

[0055] (2) Add 16g of cataly...

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Abstract

The invention belongs to the technical field of wastewater treatment, and more particularly, relates to methods for preparing a wave absorbing catalyst and for degrading organic wastewater. The invention provides the methods for preparing the wave absorbing catalyst and for degrading the organic wastewater. A zero valence transition metal is loaded on a silicon carbide profile to prepare the wave absorbing catalyst which can be repeatedly used, high-price H2O2 and O3 are not required to be additionally added, and organic pollutants in the wastewater can be quickly and effectively degraded by using O2 in air. At the same time, activated-form oxygen species (.OH and .O2<->) generated from activation have reactivity much larger than that of basic-state molecular oxygen. Common powder catalysts are avoided; the catalyst is convenient to prepare and easy to separate and recycle; the basal profile silicon carbide has the advantages of stable performance and high mechanical strength and can be repeatedly used; the method is simple and easy to operate, wide in application scope and suitable for all kinds of organic wastewater difficult to degrade, and has no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and more specifically relates to a method for preparing a wave-absorbing catalyst and degrading organic wastewater. Background technique [0002] With the rapid development of industry, the types and quantities of organic pollutants discharged into water bodies have increased sharply. Industries such as pharmaceuticals, papermaking, dyes, and electroplating will produce a large amount of refractory organic wastewater, which will inevitably affect the ecosystem and human beings when it enters the environment. Serious hazard to health. At the same time, due to the characteristics of biological toxicity, refractory degradation and poor biodegradability, biological water treatment methods cannot meet the requirements of water treatment. Traditional chemical treatment methods, biochemical treatment methods, and physical chemical treatment methods are high in cost and easily cause seconda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/224B01J37/34C02F1/72C02F1/30C02F1/74
CPCB01J27/224B01J37/348C02F1/302C02F1/725C02F1/74
Inventor 王琳玲陈静马小雪王鑫但锦锋高成栋舒欣欣何浩洋
Owner HUAZHONG UNIV OF SCI & TECH
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