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Polyacrylamide composite modified macromolecule poly silicon iron flocculant and preparing method thereof

A polyacrylamide, high molecular polysilicon technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor storage stability and poor purification effect of flocculants, achieve good COD removal rate and turbidity removal rate, reduce Possibility of agglomeration, effect of improving stability

Inactive Publication Date: 2013-05-01
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a polyacrylamide composite modified polymer polysilicon ferrosilicon flocculant and its preparation method to solve the problems of poor storage stability of existing flocculants and poor purification effect in the treatment of pharmaceutical wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Sodium silicate was dissolved in distilled water and mixed to obtain a sodium silicate solution with a mass ratio concentration of 20%, and the pH of the sodium silicate solution was adjusted to 2 with sulfuric acid to obtain a polysilicate solution;

[0024] (2) Dissolve ferric sulfate in distilled water and mix evenly to obtain a ferric sulfate solution with a mass ratio concentration of 25%. Mix the ferric sulfate solution and polysilicate solution at a Si:Fe molar ratio of 1, and add an appropriate amount of The mass ratio concentration is 15% NaOH solution, so that there is a sufficient amount of OH in the solution - Participate in the polymerization reaction of silicon and iron ions, and ripen for 110 minutes at a temperature of 45°C to obtain polysilicon ferric sulfate;

[0025] (3) Mix 20ml of polysilicon ferric sulfate with 100ml of nonionic polyacrylamide with a mass ratio concentration of 0.5% to obtain a mixture of polysilicon ferric sulfate and nonionic...

Embodiment 2

[0027] (1) Sodium silicate was dissolved in distilled water and mixed to obtain a sodium silicate solution with a mass ratio concentration of 20%, and the pH of the sodium silicate solution was adjusted to 3 with sulfuric acid to obtain a polysilicate solution;

[0028] (2) Dissolve ferric sulfate in distilled water and mix evenly to obtain a ferric sulfate solution with a mass ratio concentration of 25%. Mix the ferric sulfate solution and polysilicate solution at a Si:Fe molar ratio of 1, and add an appropriate amount of The mass ratio concentration is 15% NaOH solution, so that there is a sufficient amount of OH in the solution - Participate in the polymerization reaction of silicon and iron ions, and ripen for 120 minutes at a temperature of 50°C to obtain polysilicon ferric sulfate;

[0029] (3) Mix 50ml of polysilicon ferric sulfate with 100ml of nonionic polyacrylamide with a mass ratio concentration of 0.5% to obtain a mixture of polysilicon ferric sulfate and nonionic...

Embodiment 3

[0031] (1) Sodium silicate was dissolved in distilled water and mixed to obtain a sodium silicate solution with a mass ratio concentration of 20%, and the pH of the sodium silicate solution was adjusted to 3 with sulfuric acid to obtain a polysilicate solution;

[0032] (2) Dissolve ferric sulfate in distilled water and mix evenly to obtain a ferric sulfate solution with a mass ratio concentration of 25%. Mix the ferric sulfate solution and polysilicate solution at a Si:Fe molar ratio of 1, and add an appropriate amount of The mass ratio concentration is 15% NaOH solution, so that there is a sufficient amount of OH in the solution - Participate in the polymerization reaction of silicon and iron ions, and ripen for 120 minutes at a temperature of 50°C to obtain polysilicon ferric sulfate;

[0033] (3) Mix 30ml of polysilicon ferric sulfate with 40ml of nonionic polyacrylamide with a mass ratio concentration of 0.5% to obtain a mixture of polysilicon ferric sulfate and nonionic ...

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Abstract

The invention discloses a polyacrylamide composite modified macromolecule poly silicon iron flocculant, which comprises polysilicon ferric sulfate and non-ionic polyacrylamide. The mass ratio between the polysilicon ferric sulfate and the non-ionic polyacrylamide is 21-2120:1. The method for preparing the flocculant comprises the following steps: (i) dissolving sodium silicate in distilled water and blending to obtain sodium silicate solution, and adjusting the pH value of the sodium silicate solution so as to obtain polysilicic acid solution; (ii) dissolving ferric sulfate in distilled water and blending to obtain ferric sulfate solution, mixing the ferric sulfate solution and the polysilicic acid solution, adding alkaline liquor and aging to obtain polyferric silicate sulfate; and (iii) mixing the polyferric silicate sulfate and nonionic polyacrylamide according to the mass ratio, stirring and aging. The flocculant provided by the invention is not only good in storage stability but also high in flocculating activity and high in COD removal rate when being used for pharmacy waste water treatment, and can be widely used for the treatment of waste water produced by large-scale pharmaceutical enterprises.

Description

technical field [0001] The invention relates to a sewage treatment flocculant and a preparation method thereof, in particular to a polyacrylamide composite modified polymer polysilicon ferric flocculant and a preparation method thereof. Background technique [0002] With the development of modern industry, a large amount of sewage is discharged, which seriously pollutes the living environment of human beings. Therefore, water pollution is an urgent problem for human beings to solve. The flocculation and sedimentation method is an important water treatment method. The quality of wastewater purification depends largely on the performance of flocculants. Therefore, the development of various high-efficiency flocculants is one of the main research hotspots in current water treatment. [0003] At present, the flocculants commonly used in wastewater treatment are divided into inorganic flocculants and organic flocculants. Among inorganic flocculants, polyferric sulfate is a polym...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
Inventor 路达胡秀峰郝玉芬梁淑轩韦丽红潘永月
Owner HEBEI UNIVERSITY
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