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Novel polysilicate ferric magnesium flocculant

A technology of magnesium iron polysilicate and flocculant, which is applied in the fields of flocculation/sedimentation water/sewage treatment, chemical instruments and methods, energy and wastewater treatment, etc., can solve the problems of low stability, secondary pollution, restricted development, etc. Achieve the effect of low treatment cost, safe water quality and low price

Pending Publication Date: 2022-05-17
江西省水利科学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among organic polymer flocculants, natural polymer flocculants have the advantages of being non-toxic and biodegradable, but their stability is not high and difficult to obtain; while synthetic organic polymer flocculants cause secondary toxicity due to toxic monomer residues. Secondary pollution limits its development

Method used

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  • Novel polysilicate ferric magnesium flocculant
  • Novel polysilicate ferric magnesium flocculant
  • Novel polysilicate ferric magnesium flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A novel polymagnesium iron polysilicate flocculant, the method comprises the following steps:

[0029] (1) Use a constant temperature water bath to control the temperature at 25°C, add 66mL of deionized water to 5mL of industrial water glass and stir to dilute, then add it to 16mL of dilute sulfuric acid with a mass fraction of 20%, and add sodium hydroxide dropwise solution and dilute sulfuric acid to adjust the pH of the solution to 1.0, and then stir rapidly with an electric mixer to prepare polysilicic acid with a mass fraction of silicon dioxide of 2%.

[0030] (2) Keeping the temperature constant, take 8.43g of ferrous sulfate heptahydrate and 7.46g of magnesium sulfate heptahydrate and dissolve them in 20mL of deionized water, add 4 to 5 drops of concentrated sulfuric acid for acidification to prevent the precipitation of iron ions, and then pass through a peristaltic pump to The rate of 1.5mL / min is added in the solution that step (1) prepares, obtains the solut...

Embodiment 2

[0034] The method described in this example is basically the same as Example 1, the difference is that the pH controlled in step (1) and step (3) is 2, and keeping other conditions constant, the obtained polymagnesium iron silicate flocculant 2 .

Embodiment 3

[0036] The method described in the present embodiment is basically the same as that of Example 1, the difference is that the dosage of industrial water glass in step (1) is 2.5mL, and the polysilicic acid that the mass fraction of silicon dioxide is 1% is prepared, and the step (2) The dosages of ferrous sulfate heptahydrate and magnesium sulfate heptahydrate in the medium were 4.22g and 3.73g respectively, and the dosage of sodium bicarbonate solution in step (3) was 9.1mL, keeping other conditions constant, the polysilicon obtained by reaction Magnesium iron flocculant 3.

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Abstract

A preparation method of the novel polysilicate ferric magnesium flocculant comprises the following steps: diluting industrial water glass with deionized water, adding the diluted industrial water glass into dilute sulphuric acid with a certain concentration, and preparing polysilicic acid under the condition of rapid stirring; dissolving ferrous salt and magnesium salt in deionized water, adding concentrated sulfuric acid to obtain a ferrous salt and magnesium salt acidified solution, adding the ferrous salt and magnesium salt acidified solution into rapidly stirred polysilicic acid, and adding an oxidizing agent to completely oxidize ferrous ions into ferric ions; adding a certain amount of sodium bicarbonate solution, hydrolyzing ferric ions and magnesium ions, and polymerizing the hydrolyzed ferric ions and magnesium ions with polysilicic acid; and finally, standing and curing for a certain time at room temperature to obtain the polysilicate ferric magnesium flocculant. Compared with the prior art, the flocculating agent has the advantages that the operation is simple, the cost is low, the flocculating agent adsorption bridging and net repairing and sweeping capabilities are improved, the formed floc is larger and denser, the sedimentation rate is high, the turbidity, chromaticity and organic matter removal rate are high, and the coagulation performance is superior to that of a conventional flocculating agent in the market.

Description

technical field [0001] The invention belongs to the technical field of flocculant preparation, in particular to a novel polymagnesium iron polysilicate flocculant. Background technique [0002] At present, the problem of water pollution is becoming more and more serious, and water treatment technology is also facing various challenges. The key to realizing the goal of water treatment lies in the development of water treatment technology and water treatment chemicals, among which the water treatment chemicals are not only required to be effective, but also to have no secondary pollution to water quality. At present, the use of flocculants for coagulation and sedimentation in the water treatment process is an important method for removing colloidal substances and organic matter in water. Commonly used flocculants mainly include organic polymer flocculants and inorganic polymer flocculants, and organic polymer flocculants include natural and synthetic ones. Among organic poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5245Y02W10/37
Inventor 刘吕刚胡优汤崇军陈晓安孔琼菊万怡国周斌龚长春温毓繁谭淋露
Owner 江西省水利科学院
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