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Method for efficiently removing copper ions from electroplating wastewater

A technology for electroplating wastewater and copper ions, which is used in metallurgical wastewater treatment, chemical instruments and methods, water/sewage treatment, etc. Effect

Inactive Publication Date: 2014-08-20
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because of the existence of complexed copper that the treatment of copper ions in electroplating wastewater is still a worldwide problem. The concentration of copper ions in the effluent has been high. So far, the effluent concentration of copper ions in electroplating wastewater has not been lower than 0.05mg / L's report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A new method for efficiently removing copper ions in electroplating wastewater, comprising the steps of:

[0035] (1) Take 200ml of factory electroplating wastewater, the initial concentration of copper ions is 20.07mg / L. Adjust the pH value to 6, use the graphite electrode as the cathode and anode, and apply a voltage of 8V for electrolysis for 20 minutes.

[0036] (2) First add 0.0244g of sodium sulfide, stir, and electrolyze for 21 minutes.

[0037] (3) Then add 0.4648g polyaluminum sulfate (PAS), stir and electrolyze for 12min.

[0038] (4) Finally, add 0.0056g of polyacrylamide (PAM), stir, electrolyze for 22min, and end.

[0039] The experimental results show that the concentration of copper ions in electroplating wastewater after treatment by this method is 0.06mg / L, and the removal rate of copper ions is 99.70%.

Embodiment 2

[0041] A new method for efficiently removing copper ions in electroplating wastewater, comprising the steps of:

[0042] (1) Take 200ml of factory electroplating wastewater, the initial concentration of copper ions is 132.26mg / L. Adjust the pH value to 8, use the graphite electrode as the anode and the titanium electrode as the cathode, and apply a voltage of 60V for electrolysis for 5 minutes.

[0043] (2) First add 1.718g of potassium sulfide, stir, and electrolyze for 15 minutes.

[0044] (3) Then add 0.0910g polyaluminum sulfate (PAS), stir and electrolyze for 10min.

[0045] (4) Finally, add 0.0055g polyacrylamide (PAM), stir, electrolyze for 15 minutes, and end.

[0046] The experimental results show that the concentration of copper ions in electroplating wastewater after treatment by this method is 0.09mg / L, and the removal rate of copper ions is 99.93%.

Embodiment 3

[0048] A new method for efficiently removing copper ions in electroplating wastewater, comprising the steps of:

[0049] (1) Take 200ml of factory electroplating wastewater, the initial concentration of copper ions is 40.15mg / L. Adjust the pH value to 7, use the graphite electrode as the anode and the titanium electrode as the cathode, and apply a voltage of 20V for electrolysis for 13 minutes.

[0050] (2) First add 0.8658g of sodium sulfide, stir, and electrolyze for 25 minutes.

[0051] (3) Then add 0.0563g of polyaluminum sulfate (PAS), stir, and electrolyze for 10 minutes.

[0052] (4) Finally, add 0.0658g polyacrylamide (PAM), stir, electrolyze for 18 minutes, and end.

[0053] The experimental results show that the concentration of copper ions in electroplating wastewater after treatment by this method is 0.05mg / L, and the removal rate of copper ions is 99.87%.

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Abstract

The invention discloses a method for efficiently removing copper ions from electroplating wastewater, belonging to the field of wastewater treatment. The method sequentially comprises the following steps: 1, electrolyzing, namely adjusting the pH value of the electroplating wastewater to be 6-9, and electrolyzing a graphite electrode or the graphite electrode and a metal electrode as negative and positive electrodes; 2, electrolyzing, namely adding sulfide, stirring, and continuously electrolyzing; 3, electrolyzing, namely adding polyaluminium sulfate, stirring, and continuously electrolyzing; 4, electrolyzing, adding polyacrylamide, stirring, and continuously electrolyzing until the process is finished. The method is capable of quickly and efficiently treating actual copper-containing electroplating wastewater in a factory with low cost.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular to a method for treating copper ions existing in the form of complexes in actual electroplating wastewater. Background technique [0002] Excessive discharge of copper ions in electroplating wastewater will affect the survival of aquatic organisms, pollute water quality, surrounding soil and growing plants. The most basic toxic effect of copper is that it can interfere with the plant root enzyme system, and affect plant photosynthesis and fatty acid synthesis, resulting in slow plant growth, poor root development, and yellow leaves. People who eat surrounding vegetables or fish and other aquatic products can easily cause heavy metal poisoning and seriously threaten their health. [0003] At present, copper ion treatment methods in electroplating wastewater mainly include chemical precipitation method, membrane filtration method, ion exchange method, physical adsorption method, f...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/465C02F1/62C02F103/16
Inventor 张延宗杨琴吴凌姗刘燕王榕粟东杨刚沈飞邓仕槐彭宏
Owner SICHUAN AGRI UNIV