Silicon dioxide-modified heavy metal waste water adsorbent, and preparation method thereof

A silica and adsorbent technology, applied in chemical instruments and methods, alkali metal compounds, adsorbed water/sewage treatment, etc., can solve the problems of low adsorption capacity of activated carbon, easy pollution of resin, and restrictions on application occasions, and achieve pore channels Regular structure, high selectivity, effect of improving effectiveness

Inactive Publication Date: 2017-05-31
WUXI LONGYING ENVIRONMENTAL PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of traditional activated carbon is low, and it does not have advantages in cost and performance compared with many adsorbents. After modification, the adsorption capacity is greatly improved.
However, the application of ion exchange resin is greatly restricted due to the resin being easily polluted or oxidized and invalidated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A silica-modified heavy metal wastewater adsorbent, which is composed of the following components in parts by weight: 19 parts of silica, 13 parts of tetraethyl orthosilicate, 3-aminopropyltriethoxysilane 13 parts, 12 parts of salicylaldehyde, 8 parts of dichloromethane, 8 parts of absolute ethanol, 9 parts of sodium bicarbonate, 7 parts of copper nitrate, 13 parts of maleic anhydride, 12 parts of glutaraldehyde.

[0025] A preparation method of a silica-modified heavy metal wastewater adsorbent, comprising the following steps:

[0026] (1) Preparation of adsorbent matrix: After mixing tetraethyl orthosilicate, 3-aminopropyltriethoxysilane and salicylaldehyde, crush and grind until the particle size is 90 mesh, place it in an oven at 90°C for treatment 65 minutes;

[0027] (2) Modification for the first time: adding silicon dioxide to the adsorbent matrix, placing it in a crucible for heating, adding 7% sulfuric acid solution dropwise while heating, and stopping heatin...

Embodiment 2

[0032] A silica-modified heavy metal wastewater adsorbent, which is composed of the following components in parts by weight: 26 parts of silica, 21 parts of tetraethyl orthosilicate, 3-aminopropyltriethoxysilane 22 parts, salicylaldehyde 19 parts, dichloromethane 13 parts, absolute ethanol 14 parts, sodium bicarbonate 15 parts, copper nitrate 16 parts, maleic anhydride 16 parts, glutaraldehyde 19 parts.

[0033] A preparation method of a silica-modified heavy metal wastewater adsorbent, comprising the following steps:

[0034](1) Preparation of adsorbent matrix: After mixing tetraethylorthosilicate, 3-aminopropyltriethoxysilane and salicylaldehyde, crush and grind until the particle size is 110 mesh, place it in an oven at 102°C for treatment 85 minutes;

[0035] (2) Modification for the first time: adding silicon dioxide to the adsorbent matrix, placing it in a crucible for heating, adding 16% sulfuric acid solution dropwise while heating, and stopping heating after becoming...

Embodiment 3

[0040] A silica-modified heavy metal wastewater adsorbent, which is composed of the following components in parts by weight: 32 parts of silica, 26 parts of tetraethyl orthosilicate, 3-aminopropyltriethoxysilane 28 parts, salicylaldehyde 25 parts, dichloromethane 17 parts, absolute ethanol 19 parts, sodium bicarbonate 17 parts, copper nitrate 19 parts, maleic anhydride 22 parts, glutaraldehyde 25 parts.

[0041] A preparation method of a silica-modified heavy metal wastewater adsorbent, comprising the following steps:

[0042] (1) Preparation of adsorbent matrix: After mixing tetraethylorthosilicate, 3-aminopropyltriethoxysilane and salicylaldehyde, crush and grind until the particle size is 120 mesh, place it in an oven at 110°C for treatment 100 minutes;

[0043] (2) Modification for the first time: adding silicon dioxide to the adsorbent matrix, placing it in a crucible for heating, adding 22% sulfuric acid solution dropwise while heating, and stopping heating after becomi...

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PUM

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Abstract

The invention discloses a silicon dioxide-modified heavy metal waste water adsorbent, and a preparation method thereof. The silicon dioxide-modified heavy metal waste water adsorbent is composed of, by weight, 19 to 32 parts of silicon dioxide, 13 to 26 parts of tetraethyl orthosilicate, 13 to 28 parts of 3-aminopropyltriethoxysilane, 12 to 25 parts of salicylaldehyde, 8 to 17 parts of dichloromethane, 8 to 19 parts of absolute ethyl alcohol, 9 to 17 parts of sodium bicarbonate, 7 to 19 parts of copper nitrate, 13 to 22 parts of maleic anhydride, and 12 to 25 parts of glutaraldehyde. The silicon dioxide-modified heavy metal waste water adsorbent possesses following advantages: 1, the silicon dioxide-modified heavy metal waste water adsorbent contains mesoporous silica with chelating effect and a highly ordered structure, the specific surface area is large, the channel structure is uniform, the aperture is large and adjustable, and adsorption capacity is large; 2, the silicon dioxide-modified heavy metal waste water adsorbent possesses high selectivity on heavy meal ion adsorption, and is capable of improving the effectiveness of adsorption on heavy metal at low concentration pollution.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a water heavy metal restoration technology, in particular to a silica-modified heavy metal wastewater adsorbent and a preparation method thereof. Background technique [0002] Heavy metal wastewater mainly comes from mining, iron and steel and non-ferrous metal smelting, processing and use of metal materials and metal products, such as drainage in mine pits, leaching water from waste rock yards, tailings drainage from mineral processing plants, pickling drainage from steel plants, non-ferrous metal wastewater, etc. Dust removal and drainage in smelters, pickling water in non-ferrous metal processing plants, washing water in electroplating plants, batteries, paints, pigments, rubber, plastics, pesticides, chemical fertilizers, leather and other industries. Among them, mining and smelting are the most important sources of pollution. The type, content and existing form of heav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/267B01J20/28054C02F1/285C02F2101/22
Inventor 尤为杨燕宗
Owner WUXI LONGYING ENVIRONMENTAL PROTECTION TECHCO
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