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Oil sludge carbon supported metal catalyst, and preparation method and application thereof

A technology for supporting metals and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as leakage and secondary pollution, and achieve efficient and stable degradation. Strong and economical effect

Pending Publication Date: 2019-12-10
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although transition metals are considered to be better initiators for activating peroxymonosulfate oxidation, their leakage has secondary pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Oily peat preparation process: put the oily sludge in an oven at 80°C for 12 hours, dry it until it is completely dry, then place it in a tube furnace, and dry it in an inert gas with high-purity N 2 Under the protection of 700 ℃ pyrolysis 4h (N 2 The purity is greater than 99.999%, the air intake rate is 0.2L / min, and the heating rate is 5°C / min); the powdered KOH particles (through 100 mesh sieve) and the pyrolyzed oily sludge are mixed at a ratio of 2:1 (mass ratio) Solid-solid mixing, placed in a tube furnace under inert gas high-purity N 2 Under the protection of 300 ℃ 4h (N 2 The purity is greater than 99.999%, the air intake rate is 0.2L / min, and the heating rate is 10°C / min); the activated oil peat is washed with 0.1mol / L hydrochloric acid and stirred for 1h, and washed with deionized water until the pH is 6.5-8.0 , dried in an oven at 80°C for 12 hours, and ground through a 100-mesh sieve; the specific surface area of ​​the prepared carrier oil peat was 1...

Embodiment 2

[0030] (1) Oily peat preparation process: put the oily sludge in an oven at 90°C for 10 hours, dry it until it is completely dry, and then place it in a tube furnace. 2 Under the protection of 750 ℃ ​​pyrolysis for 2.5h (N 2 The purity is greater than 99.999%, the air intake rate is 0.4L / min, and the heating rate is 4°C / min); powdered NaOH particles (through 100 mesh sieve) and pyrolyzed oily sludge are mixed at a ratio of 3:1 (mass ratio) Solid-solid mixing, placed in a tube furnace under inert gas high-purity N 2 Under the protection of 500 ℃ 3h (N 2 The purity is greater than 99.999%, the air intake rate is 0.4L / min, and the heating rate is 8°C / min); the activated oil peat is washed and stirred with 0.2mol / L hydrochloric acid for 2 hours, and washed with deionized water until the pH is 6.5-8.0 , dried in an oven at 90°C for 10 hours, and ground through a 100-mesh sieve; the specific surface area of ​​the prepared carrier oil peat was 110m 2 / g.

[0031] (2) Catalyst pre...

Embodiment 3

[0034] (1) Oily peat preparation process: put the oily sludge in an oven at 100°C for 8 hours to dry until completely dry, then put it in a tube furnace, and dry it in an inert gas with high-purity N 2 Under the protection of 800 ℃ pyrolysis 3.0h (N 2 The purity is greater than 99.999%, the air intake rate is 0.5L / min, and the heating rate is 3°C / min); the powdered KOH particles (through 100 mesh sieve) and the pyrolyzed oily sludge are mixed at a ratio of 4:1 (mass ratio) Solid-solid mixing, placed in a tube furnace under inert gas high-purity N 2 Under the protection of 700 ℃ 2.5h (N 2 The purity is greater than 99.999%, the air intake rate is 0.5L / min, and the heating rate is 7°C / min); the activated oil peat is washed and stirred with 0.3mol / L hydrochloric acid for 3 hours, and washed with deionized water until the pH is 6.5-8.0 , dried in an oven at 100°C for 8 hours, and ground through a 100-mesh sieve; the specific surface area of ​​the prepared carrier oil peat was 11...

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Abstract

The invention relates to an oil sludge carbon supported metal catalyst, and a preparation method and application thereof. The catalyst is prepared by taking oil sludge carbon as a carrier and CoFe2O4as an active component, wherein the supporting mass of the active component CoFe2O4 is 5-20%, and the specific surface area of the carrier is 100-120 m<2> / g. An oil sludge carbon based supported metalcatalyst CoFe2O4@OS is prepared by taking oil sludge carbon as a carrier and Co(NO3)2.6H2O and Fe(NO3)3.9H2O as precursors through an impregnation method, and the CoFe2O4@OS can be used as a heterogeneous catalyst to efficiently activate peroxymonosulfate (PMS) to generate free radicals to degrade pollutants in water. The carbon component in the catalyst is used as a carrier of metal oxides, so that catalytic sites are uniformly distributed, and catalytic activity and degradation efficiency of the system are improved. The oil sludge carbon based supported metal catalyst has the advantages ofhigh efficiency, convenience, wide pH application range, high stability, low catalyst preparation cost and the like, and has great potential in the aspect of pesticide wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to an oil peat-supported metal catalyst, a preparation method and application thereof, and is specifically applied in the treatment of pesticide wastewater. Background technique [0002] my country is a large agricultural production country, but due to the difficulty in the treatment of pesticide wastewater to meet the standards, the problem of non-point source pollution caused by the discharge of pesticide wastewater in my country is not uncommon. This type of wastewater has small water volume, high toxicity, high concentration of toxic organic pollutants, complex components, and many refractory substances. Most of the organic substances contained in pesticide wastewater are teratogenic, carcinogenic, and mutagenic substances, which are extremely harmful. If they are discharged randomly, they will lead to aggravated water pollution and threaten human health. Common...

Claims

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Application Information

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IPC IPC(8): B01J23/75C02F1/72C02F101/38C02F101/36
CPCB01J23/75C02F1/725C02F2101/36C02F2101/38C02F2101/306
Inventor 徐炎华滕月刘璧铭刘珍雪宋文斌
Owner NANJING UNIV OF TECH
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