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Preparation method of slow-release potassium ferrate water treatment agent

A technology of potassium ferrate and water treatment agent, which is applied in oxidation water/sewage treatment, flocculation/sedimentation water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of inability to popularize and apply, poor stability, etc. , to achieve the effect of improving utilization effectiveness, improving stability and prolonging action time

Inactive Publication Date: 2013-11-27
CHONGQING UNIV
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AI Technical Summary

Problems solved by technology

Under acidic conditions, its standard electrode potential is 2.20V, and under alkaline conditions, its standard electrode potential is 0.72V, which has strong oxidizing properties. In the process of water treatment, potassium ferrate has good oxidation, decontamination, sterilization and disinfection. And the effect of flocculation and precipitation, and will not produce secondary pollution and other toxic by-products in the process of treatment, but its poor stability makes it unable to be popularized and applied

Method used

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preparation example Construction

[0018] Technical scheme of the present invention is the preparation method of slow-release potassium ferrate water treatment agent, comprises the steps:

[0019] a. Dissolve calcium hypochlorite in a potassium hydroxide solution with a concentration of 11-14 mol / L, the mass ratio of calcium hypochlorite to potassium hydroxide is about 1:1.2-1.5, and the aperture is 500-800 mesh Purpose filter cloth for suction filtration;

[0020] b. Continue to add saturated potassium hydroxide solution until the concentration of calcium hypochlorite is 3g / 4-6mL potassium hydroxide solution; use a filter cloth with a pore size of 500 mesh to 800 mesh for suction filtration;

[0021] c. Weigh ferric nitrate nonahydrate, control the mass ratio of calcium hypochlorite and ferric nitrate nonahydrate to 1:1.5~2, quickly grind it into powder, control the temperature at 5~10°C, fully stir the condition, slowly Add to the solution obtained in step b; fully stir for 1h (let ferric nitrate and potassi...

Embodiment 1

[0030] Embodiment 1 Preparation of slow-release potassium ferrate water treatment agent of the present invention

[0031] The mass ratio of potassium ferrate and diatomaceous earth is that the preparation process of the slow release type potassium ferrate water treatment agent of 2: 1 is as follows:

[0032] (1) Prepare appropriate amount of 13mol / L and saturated hydrogen oxidant solution respectively, cool to room temperature, and wait for subsequent use;

[0033] (2) Weigh 15g of calcium hypochlorite into a beaker, add 25mL of 13mol / L potassium hydroxide solution, stir slightly with a glass rod, and use a filter cloth with a pore size of 800 mesh to filter the reacted solution with suction. Obtain solution A;

[0034] (3) Slowly add 20mL of saturated potassium hydroxide solution to solution A, stir well and filter with suction to obtain solution B;

[0035] (4) Weigh 8g of ferric nitrate nonahydrate, quickly grind it into powder, and slowly add it to solution B in an ice-w...

Embodiment 2

[0038] Embodiment 2 Preparation of slow-release potassium ferrate water treatment agent of the present invention

[0039] The mass ratio of potassium ferrate and diatomaceous earth is that the preparation process of the slow release type potassium ferrate water treatment agent of 1: 1 is as follows:

[0040] (1) Prepare appropriate amount of 11mol / L and saturated hydrogen oxidant solution respectively, cool to room temperature, and wait for subsequent use;

[0041] (2) Weigh 15g of calcium hypochlorite into a beaker, add 35mL of 11mol / L potassium hydroxide solution, stir slightly with a glass rod, and use a filter cloth with a pore size of 800 mesh to filter the reacted solution with suction. Obtain solution A;

[0042] (3) Slowly add 25mL of saturated potassium hydroxide solution to solution A, stir well and filter with suction to obtain solution B;

[0043] (4) Weigh 8g of ferric nitrate nonahydrate, quickly grind it into powder, and slowly add it to solution B in an ice-w...

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Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of a slow-release potassium ferrate water treatment agent. The invention aims to provide a potassium ferrate water treatment agent with slow-release effect. The preparation method provided by the technical scheme comprises the following steps: dissolving calcium hypochlorite in a saturated potassium hydroxide solution, adding iron nitrate nonahydrate, stirring, adding kieselguhr, carrying out ice segregation, standing, and carrying out vacuum filtration, wherein the filter cake is the slow-release potassium ferrate water treatment agent. The slow-release potassium ferrate water treatment agent provided by the invention can implement slow release of potassium ferrate in a water treatment process, lower the noneffective decomposition of the potassium ferrate, and enhance the utilization effectiveness of the potassium ferrate, thereby achieving the goals of lowering the reagent consumption and enhancing the water treatment effect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of a slow-release potassium ferrate water treatment agent. Background technique [0002] Due to the aggravation of environmental pollution, the safety of drinking water quality has emerged. Corresponding to the severe pollution situation is the relatively ineffective treatment technology of existing water supply plants. It is of great significance to research and develop high-efficiency and low-consumption pretreatment technology suitable for the characteristics of micro-polluted source water. In view of my country's current technical and economic conditions, it is a good method to develop enhanced coagulation technology that can improve the purification effect of organic matter. This technology does not require large-scale transformation of existing water supply treatment facilities, and the investment and operation costs are re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/50C02F1/52
Inventor 徐璇陶萍魏威张岩范子红吉芳英
Owner CHONGQING UNIV
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