Copper Sulfide Electrode Material for Wastewater Treatment
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Solution Overview
Problem
Existing methods for removing copper ions from industrial wastewater, such as adsorption, chemical precipitation, and capacitive deionization, face challenges like poor removal ability at low concentrations, secondary pollution, high energy consumption, limited ion exchange capacity, low adsorption efficiency, and membrane pollution.
Innovation Solution
A method for producing copper sulfide electrode material involves stirring copper(ii) nitrate hydrate and thiourea in a mixed solution, adding hexadecyl trimethyl ammonium bromide, and reacting the mixture to form crude copper sulfide, which is then processed into a cathode electrode for capacitive deionization, allowing for efficient copper ion extraction with minimal secondary pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If adsorption method is used to remove copper ions, then adsorption capacity is improved, but secondary pollution is generated
Solution Approach 1:
The patent employs chemical precipitation using sulfur source reagents to convert copper ions into copper sulfide precipitates, which are then collected and regenerated. This chemical transformation approach replaces traditional adsorption methods, achieving high removal efficiency while enabling resource recovery and minimizing secondary pollution through controlled chemical reactions rather than physical adsorption that requires frequent regeneration.
Solution Approach 2:
The patent implements a recovery system where copper-containing precipitates are collected, dried, and regenerated to recover copper resources. The spent electrode materials are processed to recover copper sulfide, which can be reused or further processed. This closed-loop approach transforms waste into recoverable resources, eliminating secondary pollution while maintaining high copper removal capacity.
2Quantity of substance
If chemical precipitation is used to remove copper ions, then removal efficiency is improved, but difficulty in disposal of residual chemicals increases
Solution Approach 1:
The patent converts chemical precipitation residuals into recoverable copper sulfide precipitates that are collected, dried, and regenerated. Instead of disposing of chemical waste, the system recovers copper resources from the precipitates, transforming a disposal problem into a resource recovery opportunity. The spent materials are processed to retrieve valuable copper compounds for reuse.
Solution Approach 2:
The patent transforms the harmful chemical precipitation residuals into beneficial recoverable resources. By using sulfur source reagents to form copper sulfide precipitates, the system converts what would be chemical waste into recoverable copper compounds. The precipitation process, which traditionally creates disposal challenges, becomes a resource recovery step when combined with the regeneration system.
3Quantity of substance
If membrane separation is used to remove copper ions, then separation efficiency is improved, but membrane pollution occurs
Solution Approach 1:
The patent extracts copper ions from solution through chemical precipitation using sulfur source reagents, forming insoluble copper sulfide precipitates that can be easily separated by filtration or sedimentation. This extraction approach replaces membrane separation, eliminating membrane pollution while achieving high separation efficiency through selective chemical precipitation and simple solid-liquid separation.
4Use of energy by moving object
If capacitive deionization is used to remove copper ions, then energy consumption is reduced, but ion exchange capacity is limited
Solution Approach 1:
The patent employs chemical precipitation with sulfur source reagents to rapidly and efficiently remove copper ions, achieving high removal capacity that exceeds the limitations of capacitive deionization. The chemical reaction approach provides superior ion exchange capacity while the process can be designed to be energy-efficient through passive precipitation and simple filtration, avoiding the energy-intensive regeneration cycles of capacitive systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The copper sulfide electrode material effectively removes copper ions from wastewater with high adsorption capacity, wide applicability, and reusability, overcoming interference from other salt ions and heavy metals, while maintaining performance through repeated adsorption and desorption.
Implementation Method 1
stirring and dissolving copper(ii) nitrate hydrate (Cu(NO3)2.3H2O) and Thiourea (CH4N2S) in a mixed solution... so that the mixture B reacts in the roaster to produce crude copper sulfide (CuS)
Implementation Method 2
The copper sulfide electrode material of the invention has a wide range of applications, and it is used for the treatment of copper-containing wastewater while extracting copper. The copper sulfide is a Faraday material... shows high adsorption in the process of copper-containing wastewater treatment
Data Source
AI summary
A method of making copper sulfide electrode material comprising steps of: 1) stirring and dissolving copper(ii) nitrate hydrate (Cu(NO3)2.3H2O) and Thiourea (CH4N2S) in a mixed solution consisting of ethylene glycol and deionized water; 2) adding hexadecyl trimethyl ammonium bromide (C19H42N.Br) to mixture A; 3) placing the mixture B into a roaster, raising a temperature of the roaster to 100° C. to 180° C. for 10 hours to 18 hours; 4) washing the crude CuS by using a mixed fluid of ethanol absolute (C2H6O) and deionized water to be cooled in a room temperature, placing the crude CuS in the roaster and raising a temperature of the roaster to 50° C. to 80° C.; 5) producing cathode electrode of asymmetric capacitive deionization module by using the copper sulfide electrode material; 6) producing anode electrode of asymmetric capacitive deionization module by using activated carbon electrode material.