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Composite heavy metal sewage treatment material and preparation method thereof

A sewage treatment and heavy metal technology, applied in water/sewage treatment, water/sludge/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve high cost, slow floc settlement process, and inconvenient maintenance of heavy metal sewage treatment and other problems, to achieve the effect of strong binding ability and large specific surface area

Active Publication Date: 2019-12-10
济南雅歌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the composition of the heavy metal scavenger is organic matter, and the flocs are relatively loose, and the density difference with water is small, the sedimentation process of the flocs is relatively slow. Therefore, large sedimentation or clarification equipment is required, and the application scenarios are limited; The binding ability of chemical groups to different heavy metal ions is different, which often results in incomplete removal of certain ions, and additional types of agents need to be added, which brings inconvenience to the maintenance of heavy metal sewage treatment and high cost

Method used

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  • Composite heavy metal sewage treatment material and preparation method thereof
  • Composite heavy metal sewage treatment material and preparation method thereof
  • Composite heavy metal sewage treatment material and preparation method thereof

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Experimental program
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Embodiment 1

[0037] This embodiment provides a composite heavy metal sewage treatment material and a preparation method thereof, and the preparation method is carried out according to the following steps:

[0038] Step S101:

[0039] Disperse 1.8g of mesoporous silica and 0.2g of ferric ferric oxide crystalline particles uniformly in 100mL of absolute ethanol by ultrasonication, add 0.4g of 3-aminopropyltrimethoxysilane, stir at room temperature for 2h, and heat up to 85 ℃, and at N 2Reflux in the atmosphere, centrifuge, disperse the solid obtained by centrifugation in absolute ethanol, wash, and then vacuum dry to obtain modified composite particles;

[0040] Step S102:

[0041] Disperse the reaction product synthesized in step S101 in 20 mL of water, cool down to 5°C, add 0.36 g of 50% NaOH aqueous solution, and then slowly drop 0.34 g of CS 2 After the dropwise addition, return the reaction system to room temperature and continue stirring for 2 hours to obtain the final composite hea...

Embodiment 2

[0044] Step S101:

[0045] Disperse 1.6g of mesoporous silica and 0.4g of ferroferric oxide crystalline particles uniformly in 80mL of absolute ethanol by ultrasonication, add 0.5g of 3-aminopropyltriethoxysilane, stir at room temperature for 2h, and heat up to 90°C, and at N 2 Reflux in the atmosphere, centrifuge, disperse the solid obtained by centrifugation in absolute ethanol, wash, and then vacuum dry to obtain modified composite particles;

[0046] Step S102:

[0047] Disperse the reaction product synthesized in step S101 in 20 mL of water, cool down to 10°C, add 0.36 g of 50% NaOH aqueous solution, and then slowly drop 0.34 g of CS 2 After the dropwise addition, return the reaction system to room temperature and continue stirring for 2 hours to obtain the final composite heavy metal sewage treatment material.

[0048] A certain electroplating waste water with high nickel content was added with the composite heavy metal sewage treatment material prepared in this examp...

Embodiment 3

[0051] Step S101:

[0052] Disperse 1.0g of mesoporous silica and 1.0g of ferroferric oxide crystalline particles uniformly in 90mL of absolute ethanol by ultrasonic, add 0.6g of 3-aminopropylmethyldiethoxysilane, and stir at room temperature for 2h. Warming up to 80°C, and under N 2 Reflux in the atmosphere, centrifuge, disperse the solid obtained by centrifugation in absolute ethanol, wash, and then vacuum dry to obtain modified composite particles;

[0053] Step S102:

[0054] Disperse the reaction product synthesized in step S101 in 20 mL of water, cool down to 10°C, add 0.42 g of 50% NaOH aqueous solution, and then slowly drop 0.40 g of CS 2 After the dropwise addition, return the reaction system to room temperature and continue stirring for 2 hours to obtain the final composite heavy metal sewage treatment material.

[0055] A certain electroplating waste water with high copper content was added with the composite heavy metal sewage treatment material prepared in this...

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Abstract

The invention provides a compound type heavy metal-containing wastewater treatment material and a preparation method thereof. The method mainly comprises two steps of first, using an aminosilane coupling agent to perform surface modification on mesoporous silica and magnetic ferroferric oxide particles, so that the mesoporous silica and magnetic ferroferric oxide particles are provided with amino groups; second, reacting the amino groups on the modified particle surfaces with carbon disulfide and sodium hydroxide to generate dithiocar-bamate. The generated treatment material has three matters including the mesoporous silica, the magnetic ferroferric oxide and the dithiocar-bamate at the same time. When the material prepared by the method provided by the invention is used for heavy metal-containing wastewater treatment, the dithiocar-bamate can be highly bonded to heavy metal in wastewater, the characteristic of large specific surface area of the mesoporous silica is utilized, so more heavy metal ions are bonded, and meanwhile, with the existence of the magnetic ferroferric oxide, the treatment material bonded to the heavy metal ions is more easily separated from the wastewater, so as to quickly and thoroughly remove heavy metal ions.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a composite heavy metal sewage treatment material and a preparation method thereof. Background technique [0002] Heavy metal sewage refers to the sewage containing heavy metals discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, and instrumentation. Heavy metal (such as cadmium, nickel, mercury, zinc, etc.) sewage is one of the most serious environmental pollution and one of the most harmful industrial sewage. Heavy metals in sewage generally cannot be decomposed and destroyed, but can only transfer their existing positions and change their physical and chemical forms. [0003] At present, the commonly used heavy metal sewage treatment methods in my country include chemical, physical and biological methods. In comparison, the chemical method has quick effect, high cost perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/62C02F1/48
CPCC02F1/488C02F1/62C02F2101/22
Inventor 李连山柳沛丰张立鹏
Owner 济南雅歌新材料科技有限公司