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Method for carrying out electrolytic treatment on copper-containing electroplating wastewater and recycling copper

A technology of electrolytic treatment and copper electroplating, applied in the direction of water/sewage treatment, metallurgical wastewater treatment, chemical instruments and methods, etc., can solve problems such as difficult control, complicated process, secondary pollution, etc., achieve convenient collection, simple process flow, No secondary pollution effect

Inactive Publication Date: 2013-04-03
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method with simple process, easy control and no secondary pollution for the shortcomings of existing methods for treating copper-containing electroplating wastewater, such as complex process, difficult control, secondary pollution, and low removal rate. Electroplating wastewater treatment technology with advantages such as high removal rate, recyclable deposited copper, and reusable effluent

Method used

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  • Method for carrying out electrolytic treatment on copper-containing electroplating wastewater and recycling copper

Examples

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Effect test

Embodiment 1

[0039] Refer to attached figure 1 , a method for electrolytically treating copper-containing electroplating wastewater and recovering copper. The electrolytic treatment of copper-containing electroplating wastewater is carried out through an electrolytic treatment of copper-containing electroplating wastewater. The electrolytic treatment of copper-containing electroplating wastewater includes an electrolytic cell 1 and an electrolyte stirring device. The electrolytic cell 1 adopts a glass electrolytic cell, the anode 3 adopts a titanium-based platinum electrode, and the cathode 4 adopts a copper electrode. The anode 3 and the cathode 4 are arranged alternately in a unipolar parallel manner, and an exhaust port 5 and a feed port are arranged on the top of the electrolytic cell 1 7. A valve is provided on the feed port 7, a pH meter 6 is provided in the electrolytic cell 1, a discharge port 8 is provided at the bottom of the electrolytic cell 1, and a valve is provided on the dis...

Embodiment 2

[0042] Refer to attached figure 1 , The electrolytic treatment of copper-containing electroplating wastewater device for electrolytic purification of copper-containing electroplating wastewater is the same as in Example 1. The method for electrolytic treatment of copper-containing electroplating wastewater is: before electrolytic treatment, add an appropriate amount of quicklime to the electroplating copper-containing wastewater with a concentration of 15.8mg / L, adjust the pH value of the wastewater to 6.9, and filter to remove sediment; pass the filtrate through the The feed port 7 enters the electrolytic cell 1 as the electrolyte 2, and then adds appropriate amounts of NaCl and KCl in the electrolyte 2 at a molar ratio of 1:1, so that the content of chloride ions in the solution is twice the content of copper ions, and the anode The distance between 3 and cathode 4 is 4.5mm; during electrolysis, pass 5.0V direct current, slowly add 30% hydrogen peroxide solution to the anode...

Embodiment 3

[0044] Refer to attached figure 1 , The electrolytic treatment of copper-containing electroplating wastewater device for electrolytic purification of copper-containing electroplating wastewater is the same as in Example 1. The method of electrolytic treatment of copper-containing electroplating wastewater is: before electrolytic treatment, add an appropriate amount of quicklime to the electroplating copper-containing wastewater with a concentration of 384mg / L, adjust the pH value of the wastewater to 7.0, and filter to remove sediment; pass the filtrate through the feed Port 7 enters the electrolytic cell 1 as the electrolyte 2, and then adds an appropriate amount of NaCl and KCl in the electrolyte 2 at a molar ratio of 1:1, so that the content of chloride ions in the solution is twice the content of copper ions, and the anode 3 The distance between the cathode and the cathode 4 is 15mm; during electrolysis, connect 16.0V direct current, slowly add 30% hydrogen peroxide soluti...

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Abstract

The invention relates to a method for carrying out electrolytic treatment on copper-containing electroplating wastewater and recycling copper. Compared with the existing copper-containing electroplating wastewater treatment methods, the method provided by the invention has the advantages of simple process, easiness in control, no secondary pollution, high removal ratio, recyclable precipitated copper and reusable outlet water. The method for carrying out electrolytic treatment on copper-containing electroplating wastewater and recycling copper is achieved through the following manners: the copper-containing electroplating wastewater electrolysis treatment is carried out through a copper-containing electroplating wastewater electrolysis treatment device, wherein the device comprises an electrolysis bath and an electrolyte stirring device; and the method comprises the following steps of: adding quicklime to the copper-containing electroplating wastewater so as to adjust the pH value of the wastewater, removing precipitates from the copper-containing electroplating wastewater so as to obtain an electrolyte, and adding a certain amount of NaCl and KCl to the electrolysis bath containing the electrolyte; during electrolysis, slowly adding a right amount of hydrogen peroxide liquid to the electrolysis bath; and after the copper is precipitated from the negative electrode, recycling the precipitated copper.

Description

technical field [0001] The invention relates to the field of wastewater treatment containing heavy metal ions, and uses electrolysis to remove copper ions in electroplating wastewater, in particular to a method for electrolytically treating copper-containing electroplating wastewater and recovering copper. technical background [0002] Heavy metals are difficult to biodegrade and easy to accumulate in the environment, which can have long-term adverse effects on the environment and human health. How to completely eliminate heavy metal pollution and recycle the water and heavy metal resources in heavy metal-containing wastewater has become the focus of attention of scholars dedicated to environmental protection research. The methods for treating wastewater containing heavy metal ions are generally divided into four categories: the first category is based on the principle of solubility product to make heavy metals generate insoluble compounds in water to achieve the purpose of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F9/08C25C1/12C02F1/28C02F1/66C02F103/16
CPCY02P10/20
Inventor 李小忠吕妍郜雪媒蓝阳丰
Owner ZHEJIANG NORMAL UNIVERSITY
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