Method for treating heavy metal ions in chemical sewage by utilizing silicon dioxide

A technology of heavy metal ions and silicon dioxide, applied in the field of heavy metal ions, can solve the problems of difficult sewage treatment, difficult to meet the treatment requirements of heavy metal ions in sewage, etc., and achieves the advantages of reducing cluster distance, improving pulverization uniformity and good adsorption effect. Effect

Inactive Publication Date: 2021-08-20
WEINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the differences in the components of sewage discharged from different chemical plants, heavy metal ions may only be some of the pollution ion components in sewage. When the sewage also contains other pollutants such as organic matter, the relationship between the various pollution components must be considered , to determine the order of treatment of different pollution components, the difficulty of treatment of this kind of sewage with complex pollution components is very large, and the existing heavy metal ion adsorption materials are difficult to meet the treatment requirements of heavy metal ions in sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method of treating heavy metal ions in chemical sewage using silica, including the following steps:

[0029] S1, with silica as a raw material, using a pulverizer, then separated by a separator, a powder of 50-100 nm particle size range is collected, and nano silica is prepared.

[0030] S2, nano silica was added to a 5 mol / L of sodium hydroxide solution, stirred at 80 ° C for 1 h, filtered, washed to the cleaning liquid as neutral, and nano silica precipitate was collected and dried. A;

[0031] S3, 1 g of substance A and 1 g of methacrylate is dispersed in 20 g n, N-dimethylformamide, and a 1 g mass fraction of concentrated sulfuric acid is added to the dispersion system, in a nitrogen atmosphere and 90 ° C. The reaction was stirred under conditions for 5 h, and the precipitate was collected by 10000R, and the water was washed to the cleaning liquid was neutrally dried to give a substance B;

[0032] S4, the solid particles of 500 ml of chemical sewage (in the organic...

Embodiment 2

[0035] A method of treating heavy metal ions in chemical sewage using silica, including the following steps:

[0036] S1, with silica as a raw material, using a pulverizer, then separated by a separator, a powder of 50-100 nm particle size range is collected, and nano silica is prepared.

[0037]S2, nano silica was added to 10 mol / L of sodium hydroxide solution, stirred at 85 ° C for 0.5 h, filtered, and washed the precipitated water to the cleaning liquid as neutral, and the nano silica precipitate was collected and dried. Material A;

[0038] S3, 1 g of substance A and 1 g of methacrylate is dispersed in 20 g n, N-dimethylformamide, and a 1 g mass fraction of 10% concentrated sulfuric acid is added to the dispersion system, in a nitrogen atmosphere and 100 ° C. The reaction was stirred under conditions for 5 h, and the precipitate was collected by 10000R, and the water was washed to the cleaning liquid was neutrally dried to give a substance B;

[0039] S4, the solid particles...

Embodiment 3

[0042] A method of treating heavy metal ions in chemical sewage using silica, including the following steps:

[0043] S1, with silica as a raw material, using a pulverizer, then separated by a separator, a powder of 50-100 nm particle size range is collected, and nano silica is prepared.

[0044] S2, nano silica was added to a sodium hydroxide solution of 8 mol / L, stirred at 70 ° C for 1 h, filtered, washed to the cleaning liquid as neutral, filtered, collecting nano silica precipitate and dried, obtaining a substance A;

[0045] S3, 2G substance A and 1 g of methacrylate is dispersed in 40 g n, N-dimethylformamide, and concentrated sulfuric acid having 8% of 2G mass fraction is added to the dispersion system, in a nitrogen atmosphere and 95 ° C. The reaction was stirred under conditions for 8 h, and the precipitate was collected by 10000r, and the water was washed to the cleaning liquid was neutral dry to obtain a substance B;

[0046] S4, 20 g of the substance B is thoroughly ...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for treating heavy metal ions in chemical sewage by utilizing silicon dioxide. The method comprises the steps of preparing nano silicon dioxide; adding nano silicon dioxide into a sodium hydroxide solution, stirring at the temperature of 70-85 DEG C, filtering, washing a precipitate with water to be neutral, filtering, collecting the precipitate, and drying to obtain a substance A; dispersing the substance A and glycidyl methacrylate in N, N-dimethylformamide, adding a sulfuric acid solution into a dispersion system, carrying out stirring reaction under the conditions of nitrogen atmosphere and the temperature of 90-100 DEG C, centrifugally collecting precipitate, washing with water, and drying to obtain a substance B; and removing solid particles in chemical sewage, adjusting the pH value of filtrate, adding pollutant degrading bacteria to treat the sewage, adjusting the pH value, and adding the substance B to treat the sewage. The method provided by the invention can still treat heavy metal ions in sewage under the condition that organic pollutants are contained, and the efficiency is high.

Description

Technical field [0001] The present invention belongs to the field of sewage treatment, and more particularly to a method of treating heavy metal ions in chemical sewage using silica. Background technique [0002] The pure water has changed the original physical properties or chemical properties after use, and has become wastewater containing different kinds of impurities. Chemical sewage is wastewater such as process wastewater, cooling water, exhaust gas washing water, equipment and venue rinsing water in chemical production. These sewage contain impurities such as solid particles, organic matter, acid solutions, alkali and heavy metal ions. If they are discharged without treatment, they can cause varying degrees of pollution, endanger human health, affect the production of industrial and agricultural. [0003] Heavy metal ions are the most common components in chemical sewage, including chemical precipitation, flocculation, flotation, flotation, ion exchange, membrane filtratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01J20/10B01J20/28B01J20/30B01J20/32C02F101/20
CPCB01J20/103B01J20/28004B01J20/3071B01J20/3085B01J20/32C02F1/001C02F1/288C02F1/66C02F3/34C02F9/00C02F2101/20
Inventor 王迁李玉红
Owner WEINAN NORMAL UNIV
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