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Preparation of carbodithioic acid-modified heavy metal adsorbing material and application of material for removing Cu<2+> in wastewater

A technology of dithiocarboxylic acid and adsorption material, which is applied in the fields of adsorption water/sewage treatment, water pollutants, water/sewage treatment, etc. The effect of alkali resistance and simple preparation steps

Inactive Publication Date: 2015-04-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current problems of serious urban environmental pollution and difficult treatment of urban waste water, the present invention proposes to use chloromethylated cross-linked polystyrene as the matrix, diethylenetriamine reflux reaction to synthesize amino resin, and further modify carbon disulfide to obtain disulfide resin. Carboxylic acid modified chelating resin

Method used

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  • Preparation of carbodithioic acid-modified heavy metal adsorbing material and application of material for removing Cu&lt;2+&gt; in wastewater
  • Preparation of carbodithioic acid-modified heavy metal adsorbing material and application of material for removing Cu&lt;2+&gt; in wastewater
  • Preparation of carbodithioic acid-modified heavy metal adsorbing material and application of material for removing Cu&lt;2+&gt; in wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Extract a certain amount of chlorine balls in a Soxhlet extractor with absolute ethanol for 8 hours. After extraction, the chlorine balls are washed repeatedly with ultrapure water and absolute ethanol until the filtrate is a colorless solid and odorless. Dry in an oven at 60°C and store in a desiccator;

[0031] (2) Take 5g of the extracted chlorine spheres in a 250mL three-neck round bottom flask, add 30mL DMF to swell for 12 hours. Under the condition of magnetic stirring, 5 mL of diethylenetriamine was slowly added at 45° C., and the reaction was carried out under constant temperature reflux for 12 hours. After the reaction, the product was repeatedly washed with ultrapure water and absolute ethanol until the filtrate was a colorless solid and odorless. The grafting rate of the amino-based microsphere of gained is 31.1%;

[0032] (3) Swell the amine-based microspheres in DMF for 12 hours, slowly add carbon disulfide at 45°C, and react at constant temperature f...

Embodiment 2

[0035] (1) Extract a certain amount of chlorine balls in a Soxhlet extractor with absolute ethanol for 8 hours. After extraction, the chlorine balls are washed repeatedly with ultrapure water and absolute ethanol until the filtrate is a colorless solid and odorless. Dry in an oven at 60°C and store in a desiccator;

[0036] (2) Take 5g of the extracted chlorine spheres in a 250mL three-neck round bottom flask, add 30mL DMF to swell for 12 hours. Under the condition of magnetic stirring, 15 mL of diethylenetriamine was slowly added at 45° C., and the reaction was carried out under constant temperature reflux for 12 hours. After the reaction, the product was repeatedly washed with ultrapure water and absolute ethanol until the filtrate was a colorless solid and odorless. The grafting rate of the amino-based microsphere of gained is 36.9%;

[0037] (3) Swell the amine-based microspheres in DMF for 12 hours, slowly add carbon disulfide at 45°C, and react at constant temperature ...

Embodiment 3

[0040] (1) Extract a certain amount of chlorine balls in a Soxhlet extractor with absolute ethanol for 8 hours. After extraction, the chlorine balls are washed repeatedly with ultrapure water and absolute ethanol until the filtrate is a colorless solid and odorless. Dry in an oven at 60°C and store in a desiccator;

[0041] (2) Take 5g of the extracted chlorine spheres in a 250mL three-neck round bottom flask, add 30mL DMF to swell for 12 hours. Under the condition of magnetic stirring, 20 mL of diethylenetriamine was slowly added at 45° C., and the reaction was carried out under constant temperature reflux for 12 hours. After the reaction, the product was repeatedly washed with ultrapure water and absolute ethanol until the filtrate was a colorless solid and odorless. The grafting rate of the amino-based microsphere of gained is 35.0%;

[0042](3) Swell the amine-based microspheres in DMF for 12 hours, slowly add carbon disulfide at 45°C, and react at constant temperature f...

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Abstract

The invention relates to the field of environmental protection, and specifically relates to preparation of a carbodithioic acid-modified heavy metal adsorbing material, and application of the material for removing Cu<2+> in wastewater. The technological process comprises the following steps: (1) pretreatment of chlorine balls; (2) preparation of amino microspheres; (3) modification of amino resin by carbodithioic acid; (4) Cu<2+> adsorption property. The carbodithioic acid-modified chelating resin provided by the invention integrates physical adsorption and chemical adsorption, the preparation steps are simple, and the grafting percent of the amino resin is up to 70%. The resin uses insoluble and infusible crosslinked polystyrene as a matrix, and is good in acid and alkali resistance. The adsorption effect of the resin is higher than that of other types of resin, the 3.17*10<-4> moL.L<-1> Cu<2+> adsorption rate is 96%, the wastewater discharge can reach the primary standard (less than 0.5ppm) in China, and the resin is suitable for recycling a large number of Cu<2+> in wastewater in industrial cities and Cu<2+> salt production enterprises, and has good application prospects.

Description

technical field [0001] The present invention introduces the preparation of a heavy metal adsorption material modified by dithiocarboxylic acid and the removal of Cu in waste water. 2+ The application of this technology belongs to the field of environmental protection. technical background [0002] With the continuous development of industrial production and social economy, China has caused a large amount of heavy metals such as copper, iron, lead, mercury, and cadmium to enter the atmosphere, water, and soil during the mining, smelting, and processing of heavy metals, resulting in serious environmental pollution. . In addition, heavy metals cannot be biodegraded and are bioaccumulative, which can directly threaten the health of higher organisms including human beings, so the treatment of heavy metal pollution is urgent. The common adsorbents that have been extensively studied at present are not ideal for the adsorption of heavy metal ions, especially trace ions, and are re...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
CPCB01J20/264C02F1/285C02F2101/20
Inventor 崔玉司繁彬孙智猛
Owner UNIV OF JINAN
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