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Potassium ferrate slow-release composite material as well as preparation method and use thereof

A technology of potassium ferrate and composite materials, applied in biological sludge treatment, oxidation treatment of sludge, etc., can solve the problems of unsuitable long-term treatment of organic pollutants in sediment, high long-term operation cost, short action time, etc., and achieve improved Self-purification ability of water body, low cost and long-lasting effect

Inactive Publication Date: 2015-12-23
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one-time dosing will cause problems such as low utilization rate, short action time, ecological damage, and high long-term operating costs, so it is not suitable for long-term treatment of organic pollutants in sediment

Method used

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  • Potassium ferrate slow-release composite material as well as preparation method and use thereof
  • Potassium ferrate slow-release composite material as well as preparation method and use thereof
  • Potassium ferrate slow-release composite material as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The masses of fixed paraffin and potassium ferrate were 2g and 4g, respectively.

[0051] Weigh 6g, 8g, and 10g of quartz sand, respectively, and add them into containers filled with potassium ferrate, stir and mix evenly. Heat the beaker containing paraffin in a constant temperature water bath at 70°C. After the paraffin is completely melted, pour in the mixed quartz sand potassium ferrate mixture, stir until the mixture is completely soaked in paraffin, and quickly pour it into φ20mm×50mm while it is hot Compact in a cylindrical mold, and take it out after it is cooled and formed, and then the potassium ferrate slow-release composite materials with different quartz sand contents are obtained, and the numbers are slow-release composite materials S1 (6g quartz sand), S2 (8g quartz sand) , S3 (10g quartz sand).

[0052] In order to verify that the slow-release composite material containing different qualities of quartz sand has a slow-release effect, the iron release ra...

Embodiment 2

[0055] The mass of fixed paraffin and quartz sand is 2g and 10g respectively.

[0056] Weigh 1g, 2g, 3g, 4g, 5g of potassium ferrate respectively, add them into the container filled with quartz sand, stir and mix evenly. Heat the beaker containing paraffin in a constant temperature water bath at 70°C. After the paraffin is completely melted, pour in the mixed quartz sand and potassium ferrate mixture, stir until the mixture is completely soaked in paraffin, and quickly pour it into the φ20mm × Compact in a cylindrical mold of 50 mm, and take it out after it is cooled and formed to prepare potassium ferrate slow-release composite materials containing potassium ferrate of different qualities. Take the number as G1 (1g potassium ferrate), G2 (2g potassium ferrate), G3 (3g potassium ferrate), G4 (4g potassium ferrate), G5 (5g potassium ferrate).

[0057] In order to verify that the slow-release composite material containing different qualities of potassium ferrate has a slow-rele...

Embodiment 3

[0061] The organic matter in the bottom mud has complex components and many types. In this example, trichlorethylene (TCE), a relatively common organic pollutant whose content can be easily measured, was selected as the treatment object of the potassium ferrate slow-release composite material. In view of the large variety of organic matter in the sediment, which is difficult to measure individually and the need to maintain the measuring instrument, an aqueous solution containing TCE was used to simulate the sediment of rivers and lakes polluted by organic matter to explore the treatment effect of potassium ferrate slow-release composite materials on TCE.

[0062] Weigh 2.5g of potassium ferrate powder and put it into 250mL Erlenmeyer flask with an initial concentration of TCE of 20mg / L, stir the reaction in a magnetic stirrer and take a sample every 1h, and use high performance liquid chromatography to determine the remaining content of TCE. The experimental results show that t...

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Abstract

The invention discloses a potassium ferrate slow-release composite material as well as a preparation method and use thereof, belonging to the technical field of environment protection. The preparation method of the potassium ferrate slow-release composite material comprises the following steps: firstly, uniformly stirring and mixing quartz sand with potassium ferrate powder, so as to form a quartz sand-potassium ferrate mixture; then adding the quartz sand-potassium ferrate mixture into molten paraffin while heating, rapidly stirring until the mixture is completely infiltrated by the molten paraffin, so as to form a quartz sand-potassium ferrate-paraffin mixture; finally, rapidly pouring the quartz sand-potassium ferrate-paraffin mixture into a mold when the mixture is hot, carrying out compaction, and cooling, so as to obtain the potassium ferrate slow-release composite material. The potassium ferrate slow-release composite material has the advantages of high utilization rate, good processing effect, low cost, long duration time, easiness in acceptation by the public and the like. The preparation method is simple, convenient and rapid, and the raw materials are low in cost and easily available; the potassium ferrate slow-release composite material has the multiple effects in the removal process of organic pollutants in bottom mud and is also nontoxic and harmless to the environment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a slow-release composite material of potassium ferrate and its preparation method and application. Background technique [0002] Sediment in the water environment is an important part of the water ecosystem, and it is also the carrier and reservoir for the migration and transformation of various organic matter in the water environment. With the rapid development of my country's industry and agriculture, the discharge of untreated or improperly treated industrial wastewater, waste gas discharge, excessive use of pesticides, vehicle exhaust emissions, and solid waste incineration have produced a large number of organic pollutants. These pollutants enter the water body through atmospheric dry and wet deposition and surface runoff, and a large part of them accumulates in the sediment. Under certain conditions, organic pollutants in sediment may be transfe...

Claims

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Application Information

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IPC IPC(8): C02F11/06C02F11/02
Inventor 周王敕毛旭辉潘瑞刘继业林中正
Owner WUHAN UNIV
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