Confined range type pyrite cinder/iron oxychloride composite light-Fenton catalyst as well as preparation method and application of limited range type pyrite cinder/iron oxychloride composite light-Fenton catalyst

A technology of pyrite slag and composite light, which is applied in the field of photo-Fenton catalyst, can solve the problems of difficult control of structure and morphology, low catalytic degradation activity of organic pollutants, etc., and achieves good recycling performance and good separation and recovery performance. , the effect of improving the catalytic degradation ability

Pending Publication Date: 2022-04-22
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of traditional ferric oxychloride, such as difficulty in controlling the structure and morphology and low catalytic degradation activity for organic pollutants.

Method used

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  • Confined range type pyrite cinder/iron oxychloride composite light-Fenton catalyst as well as preparation method and application of limited range type pyrite cinder/iron oxychloride composite light-Fenton catalyst
  • Confined range type pyrite cinder/iron oxychloride composite light-Fenton catalyst as well as preparation method and application of limited range type pyrite cinder/iron oxychloride composite light-Fenton catalyst
  • Confined range type pyrite cinder/iron oxychloride composite light-Fenton catalyst as well as preparation method and application of limited range type pyrite cinder/iron oxychloride composite light-Fenton catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Get 20g of the pyrite slag that has been ground to 80 mesh sieves and add it to a 250mL three-necked bottle with mechanical stirring, dripping device and reflux condenser, and then press the hydrochloric acid volume to the pyrite slag mass ratio to be 1.49 mL: 1g, add 29.8mL of hydrochloric acid solution with a mass percentage concentration of 20.02% dropwise into the reactor, start the stirrer at the same time, and reflux at a stirring speed of 250r / min and 85°C for 1.5h;

[0037] (2) The reaction mixture of step (1) is filtered, and the filtrate is collected for use, i.e. ferric chloride solution; the filter residue is washed with distilled water until the washing water reaches near neutrality; the washing water is collected for the next round of hydrochloric acid solution preparation, and the filter residue is washed Place in a blast drying oven at 105°C and dry to constant weight to obtain 12.94 g of remaining porous slag;

[0038] (3) Add the remaining porous s...

Embodiment 2

[0040] (1) Get 20g of pyrite slag that has been ground to 80 mesh sieves and add it to a 250mL three-necked bottle with mechanical stirring, dripping device and reflux condenser, and then press the hydrochloric acid volume to pyrite slag mass ratio to be 1.74 mL: 1g, 34.8mL mass percent concentration is 22.61% hydrochloric acid solution (preparation with the washing water that embodiment 1 step (2) collects) is added dropwise in the reactor, starts agitator simultaneously, at 220r / min stirring speed and Reflux reaction at 80°C for 2h;

[0041] (2) The reaction mixture of step (1) is filtered, and the filtrate is collected for use, i.e. ferric chloride solution; the filter residue is washed with distilled water until the washing water reaches near neutrality; the washing water is collected for the next round of hydrochloric acid solution preparation, and the filter residue is washed Place in a blast drying oven at 105°C and dry to constant weight to obtain 11.80 g of residual r...

Embodiment 3

[0044] (1) Get 20g of pyrite slag that has been ground to 80 mesh sieves and add it to a 250mL three-necked bottle with mechanical stirring, dripping device and reflux condenser, and then press the hydrochloric acid volume to pyrite slag mass ratio to be 1.99 mL: 1g, 39.8mL mass percent concentration is 24.55% hydrochloric acid solution (prepared with the washing water that embodiment 2 step (2) collects) dropwise in the reactor, start stirrer simultaneously, at 200r / min stirring speed and Reflux reaction at 75°C for 2h;

[0045] (2) The reaction mixture of step (1) is filtered, and the filtrate is collected for use, i.e. ferric chloride solution; the filter residue is washed with distilled water until the washing water reaches near neutrality; the washing water is collected for the next round of hydrochloric acid solution preparation, and the filter residue is washed Place in a blast drying oven at 105°C and dry to constant weight to obtain 9.79 g of residue;

[0046] (3) Ad...

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Abstract

The invention relates to a confinement type pyrite cinder/iron oxychloride composite light-Fenton catalyst as well as a preparation method and an application of the confinement type pyrite cinder/iron oxychloride composite light-Fenton catalyst. According to the method, iron extracted from the pyrite cinder is used as an iron source for generating iron oxychloride, and residual porous slag after the iron is extracted from the pyrite cinder is used as a template and a structure regulating agent for generating the iron oxychloride; the confined pyrite cinder/iron oxychloride composite light-Fenton catalyst is prepared through the steps of leaching iron in cinder, separating residual cinder, adsorbing a leached iron solution, calcining the residual cinder-iron solution and the like, so that the structure and morphology of iron oxychloride in the composite catalytic material are effectively regulated and controlled; and the generated iron oxychloride and iron oxide in the residual slag generate a synergistic effect, so that the light-Fenton catalytic degradation performance on organic pollutants such as antibiotics is remarkably improved, a new way is provided for high-value-added resource utilization of the pyrite cinder, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to a photo-Fenton catalyst, in particular to a confinement type pyrite slag / ferric oxychloride composite photo-Fenton catalyst and its preparation method and application. Background technique [0002] With the rapid development of industrial and agricultural production and the continuous improvement of people's living standards, the types and quantities of organic matter involved in production and life are increasing day by day, resulting in a large amount of organic matter being discharged into natural water bodies, such as organic dyes, pesticides, organic solvents and Antibiotics etc. These organic substances consume dissolved oxygen in the water body, causing the COD of the water body to rise, leading to the death of aerobic microorganisms that can maintain the self-purification function of the water body and losing the self-purification function, thus making the water body black and smelly, deteriorating, and toxin accumulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128C02F1/72C02F101/30
CPCB01J27/128B01J35/004C02F1/725C02F1/722C02F2305/026C02F2101/30C02F2101/308C02F2305/10
Inventor 刘立华董文豪刘星潘伟民匡秋娟徐世杰唐安平薛建荣
Owner HUNAN UNIV OF SCI & TECH
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