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Method for preparing sustained release potassium ferrate clathrate compound for water treatment

A slow-release technology of potassium ferrate, applied in the field of water treatment, can solve problems such as unstable performance, difficulty in achieving continuous and stable treatment of water, difficulty in controlling concentration, etc., and achieve stable performance, low price, and prolonged oxidation time.

Inactive Publication Date: 2014-12-17
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Potassium ferrate has a self-reduction phenomenon, and its performance is very unstable. It will be decomposed quickly when it is added to water. It is difficult to control its concentration in water, and it is difficult to achieve the effect of continuous and stable treatment of water, so it has not been widely used in water treatment.

Method used

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Examples

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Effect test

Embodiment 1

[0019] A preparation method of slow-release potassium ferrate clathrate for water treatment, 100 grams of NaOH and 40 grams of Fe(NO 3 ) 3 9H 2 O was dissolved in 100 mL of NaClO solution with a concentration of 10%, and the temperature was controlled at 20 °C. The mixed solution was continuously stirred and reacted. After 1.5 hours of reaction, sodium ferrate liquid was obtained by suction filtration, and 45 mL of saturated KOH solution was added to the In the sodium ferrate liquid, stir for 10 minutes, and suction filter to obtain the potassium ferrate liquid; add 4.0 g of ethyl cellulose and 1.2 g of polyethylene into 200 mL of cyclohexane, heat to 80°C, and keep stirring for 1 After one hour, stop heating and cool down to 60°C, add the above-mentioned potassium ferrate liquid, and stir continuously to make it inclusion complex. After 60 minutes, centrifuge the potassium ferrate inclusion compound and the mixed solution, and vacuum dry to obtain the dry slow-release type. ...

Embodiment 2

[0023] A preparation method of slow-release potassium ferrate clathrate for water treatment, 100 grams of NaOH and 40 grams of Fe(NO 3 ) 3 9H 2 O was dissolved in 100mL NaClO solution with a concentration of 10%, and the temperature was controlled at 30°C. The mixed solution was continuously stirred and reacted. After 2 hours of reaction, the sodium ferrate liquid was obtained by suction filtration, and 45mL saturated KOH solution was added to the ferrate In the sodium liquid, stir for 15 minutes, and filter with suction to obtain the potassium ferrate liquid. Add 3.0 g of ethyl cellulose and 1.0 g of polyethylene into 200 mL of cyclohexane, heat to 80°C, and keep stirring. After 1.5 hours, stop heating and cool down to 60°C, add the above potassium ferrate liquid, and keep stirring to make it happen. Inclusion action, after 80 minutes, centrifuge the potassium ferrate inclusion compound from the mixture, and vacuum dry to obtain the dry slow-release potassium ferrate inclus...

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Abstract

The invention relates to a method for preparing a sustained release potassium ferrate clathrate compound for water treatment. The method includes the following steps that NaOH and Fe(NO3)3, 9H2O are dissolved in a 10% NaClO solution under the ice-bath condition, stirring is performed for reaction for 1.5 to 2 hours, suction filtration is performed to obtain a sodium ferrate liquid, a 45mL saturated KOH solution is added into the sodium ferrate liquid, then stirring and suction filtration are performed to obtain a potassium ferrate liquid, ethyecellulose and polyethylene are added into cyclohexane, heating is performed to reach 80 DEG C, stirring is performed continuously, heating is stopped to cool to reach 60 DEG C, the potassium ferrate liquid is added, then stirring is performed continuously, after a while, a potassium ferrate clathrate compound and a mixed liquid are subjected to centrifugal separation, and vacuum drying is performed to obtain the dry sustained release potassium ferrate clathrate compound. By means of the method for preparing the sustained release potassium ferrate clathrate compound for water treatment, oxidation time of the potassium ferrate clathrate compound on pollutants can be prolonged, the preparation method is simple, the decolorization effect on dyestuff wastewater is good, and thereby, market prospect is wide.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a slow-release potassium ferrate clathrate for water treatment. Background technique [0002] Affected by factors such as soil erosion and water pollution, my country's water resources are becoming more and more tense, and water recycling has received increasing attention. Liquid chlorine and bleaching powder have been used as water treatment agents to treat domestic water for a long time, but the chlorine in liquid chlorine and bleaching powder can react with organic matter in water to produce a variety of derivatives, including some carcinogens. [0003] Potassium ferrate (K 2 FeO 4 ) is a new type of water treatment agent with multiple functions such as oxidation, flocculation, and sterilization. It has strong oxidizing properties and can release a large amount of atomic oxygen after dissolving in water, which can quickly kill bacteria and vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/52C02F1/50
Inventor 鲁莽吴雪姣
Owner JINGDEZHEN CERAMIC INSTITUTE
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