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Method for reducing concentration of copper ions in electroplating wastewater

A technology of electroplating wastewater and copper ions, which is applied in metallurgical wastewater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of wastewater treatment, the increase of Fe ion concentration, and the lack of water purification, etc., so as to achieve easy training, The effect of low water treatment cost and simple technology

Inactive Publication Date: 2017-10-17
TAICANG BIQI NEW MATERIAL RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the concentration of heavy metal ions such as Cu, Cr, and Ni decreases, and the disadvantage is that the concentration of Fe ions increases, that is, while removing Cu, Cr, and Ni, new impurities are added, which leads to waste water treatment. for the purpose of water purification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Dissolve 5g of ferric chloride, 5g of hydrogen peroxide, and 2g of sodium p-toluenesulfonate in 500ml of deionized water, add deionized water until the volume of the solution is 1000ml, and mix well to obtain an oxidizing agent solution.

[0043] Dissolve 1 g of copper sulfate, 20 g of tartaric acid, and 5 g of disodium edetate in 500 ml of deionized water, add deionized water until the volume of the solution is 1000 ml, and mix well to obtain a copper ion-containing electroplating wastewater solution.

[0044] Put 10g of straw charcoal in an oven, dry at 120°C for 3 hours, and cool to obtain dry straw charcoal; put 8g of dry straw charcoal into a round bottom flask, add 3ml of concentrated sulfuric acid, stir, and heat to 120°C for 3 hours. Cool, add 50ml of distilled water, filter, rinse the solid with distilled water 3 times, 100ml each time, filter, dry the solid at 120°C for 6 hours, cool to obtain sulfonated straw charcoal; crush 3g of sulfonated straw charcoal int...

Embodiment 2

[0047] Dissolve 5g of ferric chloride, 5g of hydrogen peroxide, and 2g of sodium p-toluenesulfonate in 500ml of deionized water, add deionized water until the volume of the solution is 1000ml, and mix well to obtain an oxidizing agent solution.

[0048] Dissolve 10 g of copper sulfate, 20 g of tartaric acid, and 5 g of disodium edetate in 500 ml of deionized water, add deionized water until the volume of the solution is 1000 ml, and mix well to obtain a copper ion-containing electroplating wastewater solution.

[0049] Put 10g of straw charcoal in an oven, dry at 120°C for 3 hours, and cool to obtain dry straw charcoal; put 8g of dry straw charcoal into a round bottom flask, add 3ml of concentrated sulfuric acid, stir, and heat to 120°C for 3 hours. Cool, add 50ml of distilled water, filter, rinse the solid with distilled water 3 times, 100ml each time, filter, dry the solid at 120°C for 6 hours, cool to obtain sulfonated straw charcoal; crush 5g of sulfonated straw charcoal in...

Embodiment 3

[0052] Dissolve 5g of ferric chloride, 5g of hydrogen peroxide, and 2g of sodium p-toluenesulfonate in 500ml of deionized water, add deionized water until the volume of the solution is 1000ml, and mix well to obtain an oxidizing agent solution.

[0053] Dissolve 5 g of copper sulfate, 20 g of tartaric acid, and 5 g of disodium edetate in 500 ml of deionized water, add deionized water until the volume of the solution is 1000 ml, and mix well to obtain a copper ion-containing electroplating wastewater solution.

[0054]Put 10g of straw charcoal in an oven, dry at 120°C for 3 hours, and cool to obtain dry straw charcoal; put 8g of dry straw charcoal into a round bottom flask, add 3ml of concentrated sulfuric acid, stir, and heat to 120°C for 3 hours. Cool, add 50ml of distilled water, filter, rinse the solid with distilled water 3 times, 100ml each time, filter, dry the solid at 120°C for 6 hours, cool to obtain sulfonated straw charcoal; crush 4g of sulfonated straw charcoal into...

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Abstract

The invention belongs to the technical field of water treatment, and relates to a method for reducing concentration of copper ions in electroplating wastewater. The method comprises the following step: compounding stalk carbon and conducting polypyrrole on polyurethane sponge, so that the advantage that the specific surface area of the polyurethane sponge can be fully played, the contact area of copper ions in electroplating wastewater with stalk carbon conducting composite material can be extended, and the adsorption efficiency of the copper ions can be improved. In addition, the copper ions adsorbed in the stalk carbon conducting composite material is reduced into copper elementary substance under the current action, so that the concentration of copper ions in the stalk carbon conducting composite material is reduced, and copper ions in solution are further adsorbed / enriched, so that the concentration of copper ions in the electroplating wastewater is greatly reduced. The method has the following advantages that (1) the sources of raw materials are wide, and the raw materials are green and environment-friendly; and (2) the effect of removing copper ions in the electroplating wastewater is good, and the content of copper ions in purified water can be lower than 0.01ppm.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for reducing the concentration of copper ions in electroplating wastewater. Background technique [0002] In my country's "Electroplating Wastewater Discharge Standard" (GB 21900-2008), very strict standards have been set for the discharge concentration of copper ions. Commonly used copper ion treatment technologies include chemical precipitation, adsorption, and full-membrane reverse osmosis. Among them, chemical precipitation is widely used in the treatment of electroplating wastewater because of its low cost and mature technology. However, as the composition of electroplating wastewater becomes more and more complex, especially when there are some stable complexes, the method of chemical precipitation alone cannot guarantee that the mass concentration of copper ions in the effluent can meet the requirements of the new standard (electroplating and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F103/16C02F101/20
CPCC02F1/46109C02F2001/46133C02F2101/20C02F2103/16
Inventor 蓝碧健
Owner TAICANG BIQI NEW MATERIAL RES & DEV
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