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Method for removing algae in water by preparing ferrate activated persulfate

A technology for activating persulfate and ferrate, which is applied in the field of water treatment, can solve the problems of long treatment time and low activation efficiency, and achieve the effects of fast reaction speed, accelerated degradation speed and good effect

Pending Publication Date: 2022-06-07
苏州同达澄澈环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] PS activation methods include the following methods: transition metal ion (like Fe2+, Co2+, etc.) activation, ultraviolet (UV) activation, thermal activation, etc. Although thermal activation is simple and easy, the activation efficiency is not high and the processing time is relatively long. Long; UV light activation is only suitable for algae removal in small water bodies; the use of ferrate to activate PS can couple the algae removal effects of the two, greatly improving the algae removal efficiency. This method is easy to operate, low in cost, and has a wide range of applications. Has a broad application prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A self-made electrolytic cell with a SiO4 ceramic diaphragm and a cycle reverse device were used for electrolysis control. Sponge iron was used as the anode and cathode materials, 1mM sodium hydroxide solution was used as the electrolyte, and the current density was controlled at 45mA / cm3 and the current was controlled at 15A. , the electrolysis time is 4 hours, and a fixed volume of sodium ferrate solution is taken out every half an hour to measure its concentration by chromate titration.

[0045] When the concentration of sodium ferrate is greater than 0.1mM, take it out and place it in the refrigerator to cool for one hour, then use a G4 sand core funnel to remove impurities by suction filtration, place the filtrate in a beaker, and then place the beaker in an ice-water bath, slowly drip Add refrigerated 14mM potassium hydroxide solution and stir well, add dropwise the volume of 1 / 2 of that of sodium ferrate, and place the solution in the freezing layer of the refrige...

Embodiment 2

[0049] A self-made electrolytic cell with a SiO4 ceramic diaphragm and a cycle reverse device were used for electrolysis control. Sponge iron was used as the anode and cathode materials, 1mM sodium hydroxide solution was used as the electrolyte, and the current density was controlled at 45mA / cm3 and the current was controlled at 15A. , the electrolysis time is 4 hours, and a fixed volume of sodium ferrate solution is taken out every half an hour to measure its concentration by chromate titration.

[0050] When the concentration of sodium ferrate is greater than 0.1mM, take it out and place it in the refrigerator to cool for one hour, then use a G4 sand core funnel to remove impurities by suction filtration, place the filtrate in a beaker, and then place the beaker in an ice-water bath, slowly drip Add refrigerated 14mM potassium hydroxide solution and stir well, add dropwise the volume of 1 / 2 of that of sodium ferrate, and place the solution in the freezing layer of the refrige...

Embodiment 3

[0053] A self-made electrolytic cell with a SiO4 ceramic diaphragm and a cycle reverse device were used for electrolysis control. Sponge iron was used as the anode and cathode materials, 1mM sodium hydroxide solution was used as the electrolyte, and the current density was controlled at 45mA / cm3 and the current was controlled at 15A. , the electrolysis time is 4 hours, and a fixed volume of sodium ferrate solution is taken out every half an hour to measure its concentration by chromate titration.

[0054] When the concentration of sodium ferrate is greater than 0.1mM, take it out and place it in the refrigerator to cool for one hour, then use a G4 sand core funnel to remove impurities by suction filtration, place the filtrate in a beaker, and then place the beaker in an ice-water bath, slowly drip Add refrigerated 14mM potassium hydroxide solution and stir well, add dropwise the volume of 1 / 2 of that of sodium ferrate, and place the solution in the freezing layer of the refrige...

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Abstract

The invention discloses a method for removing algae in water by preparing ferrate activated persulfate. The method comprises the following steps: preparing an electrolytic reaction material; carrying out electrolytic reaction to form electrolyte; measuring the concentration of a generated substance in the electrolyte; impurities in the electrolyte are removed; adding a potassium hydroxide solution into the impurity-removed electrolyte to form a second solution; carrying out suction filtration on the second solution; carrying out dehydration treatment on the crystal subjected to suction filtration; performing vacuum drying treatment; and storing the prepared crystal. The method has the beneficial effects that only a small amount of ferrate and persulfate are needed in the method for removing the algae in the water by activating the persulfate with the ferrate, and compared with other chemical methods, a small amount of the ferrate and the persulfate are needed, so that the degradation cost is reduced; compared with a traditional physical and mechanical separation method, algae removal is convenient and fast, manpower consumption and electricity consumption are reduced, and the algae removal cost is greatly saved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for preparing ferrate-activated persulfate to remove algae in water. Background technique [0002] With the rapid development of industry and agriculture in my country, a large amount of nitrogen and phosphorus flows into the water body, which makes the water body eutrophic and causes the outbreak of algae. This not only reduces the transparency of the water body, the water quality is turbid, and the sensory effect becomes poor, but also reduces the dissolved oxygen in the water body. , causing other organisms in the water to die due to lack of oxygen, destroying the ecological balance of the water body, and posing a great threat to the safety of the water environment. Therefore, the development of technology for algae removal is imminent. [0003] In recent years, physical algae removal has not been favored due to its high removal cost. Biological algae removal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
CPCC02F1/72Y02W10/37
Inventor 钱冬旭
Owner 苏州同达澄澈环境科技有限公司
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