Iron-nitrogen co-doped biochar catalyst and preparation method and application thereof

A co-doping, biochar technology, applied in physical/chemical process catalysts, chemical instruments and methods, water pollutants, etc., can solve problems such as poor removal effect, affecting the quality of advanced treatment and purification of wastewater, and achieve reusability. Wide applicability and the effect of conversion and utilization

Inactive Publication Date: 2021-08-03
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the prior art, the present invention provides an iron-nitrogen co-doped biochar catalyst, a preparation method and its application, so as to solve the problem that the current catalyst is not effective in removing antibiotic pollutants that are difficult to degrade in sewage and affects the depth of wastewater. Dealing with Purification Quality Issues

Method used

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  • Iron-nitrogen co-doped biochar catalyst and preparation method and application thereof
  • Iron-nitrogen co-doped biochar catalyst and preparation method and application thereof
  • Iron-nitrogen co-doped biochar catalyst and preparation method and application thereof

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Embodiment 1

[0041] Please refer to figure 1 , this embodiment discloses an iron-nitrogen co-doped biochar catalyst, which is used to remove antibiotic pollutants that are difficult to degrade in tail water of municipal sewage treatment plants. The iron-nitrogen co-doped biochar catalyst has the following components: corn stalks, iron source, nitrogen source and reducing agent are prepared in proportion to the iron-nitrogen co-doped biochar catalyst. Wherein, the weight ratio of the iron source, nitrogen source and reducing agent is 5.56:3:2.5.

[0042] In the present embodiment, adopt FeSO with iron source 4 ·7H 2 O. The nitrogen source is urea, and the reducing agent is ascorbic acid as an example for illustration. In other embodiments, the iron source, nitrogen source, and reducing agent can be replaced according to actual conditions.

[0043] figure 1 Shown is the scanning electron microscope image of the iron-nitrogen co-doped biochar catalyst in this example. It can be seen from...

Embodiment 2

[0046] Please refer to figure 2 , this embodiment discloses a method for preparing an iron-nitrogen co-doped biochar catalyst, which is applied to the preparation of the iron-nitrogen co-doped biochar catalyst as described in Example 1, and the preparation method includes the following steps:

[0047] S1 provides corn stalks, iron source, nitrogen source and reducing agent;

[0048] The iron source uses FeSO 4 ·7H 2 O; the nitrogen source adopts urea; the reducing agent adopts ascorbic acid.

[0049] The corn stalks described in S2 are made into powder for later use;

[0050]Wash the corn stalks with deionized water and dry them to a constant weight. The dried corn stalks are made into powder. The process of making corn stalks into powder is carried out in a plant crusher, and finally the powder is passed through a 80-mesh sieve. The mesh is finely sieved to obtain corn stover powder.

[0051] S3 dissolving the iron source, nitrogen source and reducing agent in deionized...

Embodiment 3

[0071] Please refer to image 3 , this example discloses the application of an iron-nitrogen co-doped biochar catalyst in the efficient removal of antibiotics in water. The operation of the application is as follows:

[0072] Provide persulfate, the iron-nitrogen co-doped biochar catalyst as described in Example 1, and the iron-nitrogen co-doped biochar catalyst is prepared by the preparation method of the iron-nitrogen co-doped biochar catalyst as described in Example 2 get.

[0073] The iron-nitrogen co-doped biochar catalyst is dropped into waste water containing (norfloxacin) antibiotics;

[0074] The dosage standard of iron-nitrogen co-doped biochar catalyst is 0.1g / L.

[0075] Drop into persulfate in described waste water;

[0076] The dosage standard of persulfate is 10mmol / L.

[0077] After reacting for a period of time, the iron-nitrogen co-doped biochar catalyst is separated and reused more than five times;

[0078] The iron-nitrogen co-doped biochar catalyst a...

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Abstract

The invention discloses an iron-nitrogen co-doped biochar catalyst and a preparation method and application thereof, and is used for solving the problem that the existing catalyst has a poor removal effect on antibiotic pollutants which are difficult to degrade in sewage, and the advanced treatment and purification quality of wastewater is influenced. The iron-nitrogen co-doped biochar catalyst is used for removing antibiotic pollutants which are difficult to degrade in tail water of a municipal sewage treatment plant. The iron-nitrogen co-doped biochar catalyst is prepared from the following components: corn straw, an iron source, a nitrogen source and a reducing agent according to a ratio, wherein the weight part ratio of the iron source to the nitrogen source to the reducing agent is 5.56: 3: 2.5. The obtained iron-nitrogen co-doped biochar catalyst has the characteristics of high efficiency, stability, reusability, wide applicability and economical efficiency, can realize conversion and utilization of biomass resources, and a new method is provided for antibiotic wastewater treatment and even advanced treatment of industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage advanced treatment, in particular to an iron-nitrogen co-doped biochar catalyst, and also relates to a preparation method of the iron-nitrogen co-doped biochar catalyst and an application of the iron-nitrogen co-doped biochar catalyst . Background technique [0002] Research data show that during the period from 2000 to 2015, the total consumption of antibiotics in the world rose from 2.11 to 34.8 billion DDDs (determined daily doses), and about 61.5% of the antibiotics in the human body will maintain the same parent structure, and It enters the pipe network directly through excretion, and then enters the sewage treatment plant for purification. Although antibiotics in the liquid phase can be effectively removed after conventional and advanced treatment in sewage treatment plants, antibiotics may still accumulate in biosolids, which leads to an increased risk of antibiotic resistance gene transmis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/30
CPCB01J27/24C02F1/722C02F1/725C02F2101/30C02F2305/023
Inventor 崔康平席慕凡崔敏姝陈星陈奕涵
Owner HEFEI UNIV OF TECH
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