Method for greenly and efficiently recovering copper ions

A high-efficiency technology for copper recovery, applied in copper oxide/copper hydroxide and other directions, can solve the problems of high processing operation requirements, difficult equipment maintenance, low copper recovery rate, etc., achieve high-efficiency catalytic effect, reduce processing procedures, and reduce recovery costs. Effect

Active Publication Date: 2019-03-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method includes adding lime or sulfide to the water body. This method can effectively reduce the concentration of copper ions in the water body. Hydrogen sulfide gas is easily generated during the process of processing, and the processing operation requirements are high
Physicochemical methods include reverse osmosis and ion exchange methods. This method has the problems of short service life of reverse osmosis membranes, high preparation costs of ion exchange resins, and difficult equipment maintenance.
Biological method is a method to remove low-concentration heavy metal ions in water by the adsorption of inactive microorganisms. This method has a low recovery rate of copper, high input cost and complicated operation.

Method used

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  • Method for greenly and efficiently recovering copper ions
  • Method for greenly and efficiently recovering copper ions
  • Method for greenly and efficiently recovering copper ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Adjust the pH of 60mL 40mg / L copper sulfate solution to 5 and add 100mmol / L H 2 O 2 After stirring for 10 min, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured, and the copper recovery rate was 49%.

[0034] Adjust 60mL of 40mg / L copper sulfate solution to pH 7, add 100mmol / L H 2 O 2 After stirring for 10 min, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 50%.

[0035] Add 60mL 40mg / L copper sulfate solution, adjust the pH to 9, add 100mmol / L H 2 O 2 After stirring for 10 min, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 50%.

[0036] Add 60mL 40mg / L copper sulfate solution, adjust the pH to 11, add 100mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filtered, washe...

Embodiment 2

[0039] Add 60mL 40mg / L copper sulfate solution, adjust the pH to 12, add 200mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 99%.

[0040] Add 60mL 40mg / L copper sulfate solution, adjust the pH to 12, add 100mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 99%.

[0041] Adjust the pH to 12 with 60mL 40mg / L copper sulfate solution, add 50mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 99%.

[0042] Adjust 60mL 40mg / L copper sulfate solution to pH 12, add 25mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filt...

Embodiment 3

[0044] Add 60mL 40mg / L copper chloride solution, adjust the pH to 12, add 25mmol / L H 2 O 2 After stirring for 10 minutes, the obtained solid was filtered, washed and dried, and the residual copper ion concentration in the filtrate was measured to obtain a copper recovery rate of 99%.

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Abstract

The invention provides a method for greenly and efficiently recovering copper ions, which comprises the following steps: adding an alkali solution into a copper solution to regulate pH to an alkali state; then adding a proper amount of hydrogen peroxide to perform a reaction; and washing and drying obtained precipitates to obtain a recovered product. The obtained recovered product nano flake copper oxide is an efficient Fenton-like catalyst and can be used for degradation of organic pollutants. Compared with a conventional copper ion recovery method, the method provided by the invention has the advantages that 1, complex equipment is not required, so that recovery cost is reduced; 2, in the recovery process, toxic and harmful byproducts cannot be generated, so that the method is green andhas no pollution; 3, a recovery rate is high, and the recovery rate reaches 99% under optimal conditions; and 4, the recovered product does not need to be processed again, the processing process of the recovered product is reduced, and the recovered product is the efficient Fenton-like catalyst and can be used for degradation of the organic pollutants.

Description

Technical field [0001] The invention relates to a method for recovering copper ions in a solution, belonging to the technical field of environmental protection; in particular to a green and efficient method for recovering copper ions in a solution, the recovered product CuO can be used as an efficient Fenton-like catalyst for organic pollutants 的degradation. Background technique [0002] As an important metal, copper is widely used in various fields such as daily life, industrial production and scientific research. Although copper is an essential element for the human body, excessive intake will cause serious harm to the human body. Excessive copper entering the environment is also toxic to aquatic organisms and plants. The direct discharge of copper-containing wastewater into the water body will not only cause environmental pollution, but also a waste of resources. [0003] Commonly used methods to remove copper ions from water include chemical precipitation, physicochemical and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
CPCC01G3/02C01P2002/72C01P2004/04
Inventor 钱旭芳赵一新方梦媛吴韵雯岳东亭阚淼
Owner SHANGHAI JIAO TONG UNIV
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