Heavy metal wastewater adsorbent

A technology for adsorbents and heavy metals, applied in the fields of alkali metal compounds, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as complex operation process, high operating cost, secondary pollution, etc., and achieve analytical High efficiency, good magnetic response, and the effect of solving the problem of solid-liquid separation

Inactive Publication Date: 2021-07-02
金华市敬企科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After years of development, a variety of heavy metal treatment technologies have been formed, mainly including redox method, chemical precipitation method, ion exchange method, extraction method, chemical oxidation method, flocculation precipitation method and membrane filtration method. However, these treatment technologies There are disadvantages such as complicated operation process, high operating cost and secondary pollution

Method used

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  • Heavy metal wastewater adsorbent
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Heavy metal wastewater adsorbents include dextran-based adsorbents, and the dextran-based adsorbents are specifically prepared through the following procedures:

[0055] Step 1, the FeCl 3 ·6H 2 O and sodium acetate were dissolved in ethylene glycol, polyethylene glycol was added and stirred vigorously until completely dissolved, then reacted at 200°C for 5 hours, cooled to room temperature, separated repeatedly with a magnet, washed 3 times with absolute ethanol, and dried to obtain Magnetic Fe 3 o 4 Nanoparticles; FeCl 3 ·6H 2 The consumption ratio of O, sodium acetate, ethylene glycol and polyethylene glycol is 1mmol: 3.2mmol: 8mL: 0.11mmol;

[0056] Step 2, the magnetic Fe 3 o 4 Ultrasonic dispersion of nanoparticles in silane coupling agent G570 ethanol solution, after stirring for 12 hours, repeated separation with magnet, washing with absolute ethanol for 3 times, drying to obtain modified magnetic Fe 3 o 4 Nanoparticles; Magnetic Fe 3 o 4 The dosage r...

Embodiment 2

[0059] Heavy metal wastewater adsorbents include dextran-based adsorbents, and the dextran-based adsorbents are specifically prepared through the following procedures:

[0060] Step 1, the FeCl 3 ·6H 2 Dissolve O and sodium acetate in ethylene glycol, add polyethylene glycol and stir vigorously until completely dissolved, then react at 220°C for 3 hours, cool to room temperature, separate repeatedly with a magnet, wash twice with absolute ethanol, and dry to obtain Magnetic Fe 3 o 4 Nanoparticles; FeCl 3 ·6H 2 The consumption ratio of O, sodium acetate, ethylene glycol and polyethylene glycol is 1mmol: 3.5mmol: 10mL: 0.12mmol;

[0061] Step 2, the magnetic Fe 3 o 4 Ultrasonic dispersion of nanoparticles in the silane coupling agent G570 ethanol solution, after stirring for 10 hours, repeated separation with a magnet, washing with absolute ethanol twice, drying to obtain the modified magnetic Fe 3 o 4 Nanoparticles; Magnetic Fe 3 o 4 The dosage ratio of nanoparticles...

Embodiment 3

[0064] Heavy metal wastewater adsorbents include dextran-based adsorbents, and the dextran-based adsorbents are specifically prepared through the following procedures:

[0065] Operation 1, with embodiment 1;

[0066] Step 2, the vinyl silane coupling agent is prepared by the following method: add absolute ethanol to L-allylglycine and silane coupling agent KH560, react in an oil bath at 120°C for 6 hours under the protection of nitrogen, distill under reduced pressure, and collect The target fraction is dried to obtain a vinyl silane coupling agent; all the other are the same as in Example 1;

[0067] Operation 3 is the same as in Example 1.

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Abstract

The invention discloses a heavy metal wastewater adsorbent, and belongs to the technical field of heavy metal wastewater treatment, the heavy metal wastewater adsorbent comprises a dextran-based adsorbent, the dextran-based adsorbent is obtained by grafting and copolymerizing modified magnetic Fe3O4 nanoparticles on dextran, and the modified magnetic Fe3O4 nanoparticles are obtained by modifying a vinyl silane coupling agent. The vinyl silane coupling agent is prepared from a silane coupling agent G570 or is prepared from L-allyl glycine and a silane coupling agent KH560. A large number of hydroxyl groups exist in molecular chains of the heavy metal wastewater adsorbent, and heavy metal ions can be well adsorbed through electrostatic interaction and chelation; meanwhile, the heavy metal wastewater adsorbent has superparamagnetism and can be separated and recycled under the action of an external magnetic field, and the solid-liquid separation problem of the adsorbent is solved; in addition, the heavy metal wastewater adsorbent disclosed by the invention has recyclability, and is relatively high in heavy metal ion desorption rate.

Description

technical field [0001] The invention belongs to the technical field of heavy metal wastewater treatment, and in particular relates to an adsorbent for heavy metal wastewater. Background technique [0002] Water is one of the indispensable and most important material resources for human survival and development. However, with the rapid development of industrial and agricultural production and economy, a large amount of waste water containing pollutants is discharged into the environment without treatment, resulting in water pollution. It is becoming more and more serious, which further aggravates the shortage of water resources and seriously threatens ecological security. Heavy metal pollution accounts for a considerable proportion of water pollution. Because heavy metals cannot be degraded and are enriched, they can be transferred to animals or humans through the food chain, causing biological poisoning, and are designated as the first category of pollutants. Facing the inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/06B01J20/20B01J20/24B01J20/28009C02F1/283C02F1/286C02F1/288C02F2101/20C02F2101/30
Inventor 不公告发明人
Owner 金华市敬企科技有限公司
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