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Fenton-like catalyst and preparation method of same

A catalyst and type of technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc., can solve problems such as insufficient mineralization of organic matter, easy dissolution of metal ions, and narrow use range, and achieve good results. Application prospect, easy recovery, and the effect of wide pH range

Active Publication Date: 2018-06-29
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the narrow pH range of traditional Fenton catalysts and the easy dissolution of metal ions, H 2 o 2 The utilization rate is not high, can not fully mineralize the deficiencies such as organic matter, the invention provides a kind of Fenton catalyst and preparation method thereof

Method used

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  • Fenton-like catalyst and preparation method of same
  • Fenton-like catalyst and preparation method of same
  • Fenton-like catalyst and preparation method of same

Examples

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Effect test

Embodiment 1

[0043] according to figure 1 The method for preparing a Fenton-like catalyst includes: 1) pulverizing and sieving the dried sludge pyrolytic carbon and clay respectively to obtain sludge pyrolytic carbon powder and clay powder;

[0044] 2) adding the sludge pyrolytic carbon powder and clay powder obtained in 1) into a ball mill, adding water to carry out wet ball milling, and filtering to obtain a ball mill slurry;

[0045] 3) Stir after adding a surface modifier to the ball mill slurry in 2), to obtain a uniformly dispersed modified slurry;

[0046] 4) Drying and shaping the modified slurry in 3) and crushing to obtain a roasted blank;

[0047] 5) The roasted billet in 4) is anaerobically roasted under a protective atmosphere, and a Fenton-like catalyst is obtained after cooling.

[0048] Specifically, the sludge pyrolytic carbon and kaolin that were carbonized at 700°C for 30 minutes were dried and pulverized, passed through a 100-mesh sieve, and then 10% of the total weig...

Embodiment 2

[0054] The process for preparing Fenton-like catalysts using sludge pyrolytic carbon is the same as in Example 1. The sludge pyrolytic carbon and kaolin that were carbonized at 600°C for 40 minutes were dried and pulverized, passed through a 100-mesh sieve, and then weighed to account for 20% of the total weight. % kaolin is mixed with sludge charcoal powder accounting for 80% of the total weight, the amount of water added is controlled to a solid-liquid mass ratio of 1:3, and wet ball milling is carried out to obtain ball mill slurry. The rotating speed of the ball mill is 400r / min, and the ball milling time is 4h. After the ball milling, pass through a 300-mesh sieve to obtain ultrafine uniform slurry. Next, add 1% surface modifier stearic acid into the ball mill slurry, and then carry out mechanical stirring to obtain modified slurry. The speed of mechanical stirring is 400r / min, and the stirring time is 20min. Then the modified slurry is vacuum-dried at 70° C. for 8 hours...

Embodiment 3

[0058] The process for preparing Fenton-like catalysts using sludge pyrolytic carbon is the same as in Example 1. The sludge pyrolytic carbon and kaolin obtained by carbonizing at 500°C for 50 minutes were dried and pulverized, passed through a 100-mesh sieve, and then weighed to account for the total weight. Mix 30% of kaolin with 70% of total weight of sludge pyrolytic carbon powder, add water to control the solid-to-liquid mass ratio of 1:2, perform wet ball milling to obtain ball mill slurry, and pass through a 350-mesh sieve after ball milling to obtain ultrafine Uniform slurry. The rotational speed of the ball mill was 300r / min, and the ball milling time was 6h. Then add 1.5% surface modifier quaternary ammonium compound into the ball mill slurry, and then carry out magnetic stirring to obtain modified slurry. The speed of magnetic stirring is 500r / min, and the stirring time is 10min. Then the modified slurry is vacuum-dried at 80° C. for 6 hours. After setting, it is ...

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Abstract

The invention relates to a Fenton-like catalyst and a preparation method of same. The Fenton-like catalyst is prepared by using sludge pyrolytic carbon as a raw material and clay as a combining agentwithout addition of an iron source and a transition metal source, wherein the iron source are iron salts and iron oxides, and the transition metal source are salts and oxides of transition metals. TheFenton-like catalyst is not less than 80% in catalytic degradation efficiency on antibiotics in H2O2 degradation wastewater in the pH range of 2-10. In the invention, on one hand, by means of the sludge pyrolytic carbon as a raw material, the Fenton-like catalyst having good performances can be produced, thus supplying a new way of high-additional-value use of the sludge pyrolytic carbon; on theother hand, in a high-temperature protective atmosphere, the Fenton-like catalyst, produced in a non-oxygen calcining manner, has high strength and is not liable to fall off into liquid. The catalystis easy to recover, can stably immobilize heavy metals, is high in environmental security, is low in cost and has great application prospect.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization and wastewater treatment, in particular to a Fenton-like catalyst and a preparation method thereof. Background technique [0002] With the significant improvement of sewage treatment efficiency, the output of municipal sludge is increasing rapidly, and the pressure of municipal sludge disposal is increasing. Sludge pyrolysis and carbonization, as a relatively advanced sludge treatment technology, has gradually become a concern because it can remove viruses, parasites and toxic pollutants in sludge, and realize efficient and harmless sludge reduction. focus. At present, most of the research on sludge pyrolysis and carbonization focuses on reducing the cost of sludge reduction treatment, reducing energy consumption, and realizing the solidification and stability of heavy metals. There are not many studies on high value-added resource utilization. [0003] On the other han...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J37/08C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J23/002B01J23/78B01J37/0009B01J37/082B01J2523/00C02F1/722C02F1/725C02F2101/34C02F2101/36C02F2101/38C02F2305/026B01J2523/22B01J2523/23B01J2523/31B01J2523/41B01J2523/842
Inventor 余广炜李杰潘兰佳汪印马建立商晓甫
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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