Calcium Peroxide-Supported Activated Carbon for Black Water Remediation
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Solution Overview
Problem
Existing treatments for black and odorous water bodies are inefficient, requiring long timespans and often harm aquatic organisms due to the use of toxic chemicals like iron or aluminum salts, while activated carbon lacks oxygenation capabilities and is easily displaced by water flow.
Innovation Solution
A method of supporting nano calcium peroxide on activated carbon at the molecular level, enhancing its adsorption and oxygenation properties, involving steps like stirring activated carbon with calcium chloride, ammonia water, and hydrogen peroxide, followed by pH adjustment and centrifugation to create a calcium peroxide-supported activated carbon material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If iron or aluminum salts are added to increase water transparency, then the transparency is improved quickly, but toxic effects on aquatic organisms occur
Solution Approach 1:
The patent changes the chemical composition parameters by using calcium peroxide instead of traditional iron or aluminum salts, maintaining the transparency improvement function while eliminating toxic effects on aquatic organisms
Solution Approach 2:
The patent converts the potentially harmful calcium peroxide into a beneficial substance by controlling its decomposition to release oxygen, which improves transparency through oxidation of pollutants while simultaneously providing oxygen to aquatic organisms rather than harming them
2Quantity of substance
If activated carbon is used to adsorb pollutants and improve decolorization and deodorization, then adsorption effectiveness is improved, but the ability to increase dissolved oxygen is lost
Solution Approach 1:
The patent merges activated carbon and calcium peroxide into a composite material, combining the adsorption capabilities of activated carbon with the oxygen-generating properties of calcium peroxide, thereby achieving both pollutant removal and dissolved oxygen increase simultaneously
Solution Approach 2:
The patent creates a composite material consisting of activated carbon and calcium peroxide, where the two components work synergistically: activated carbon provides adsorption for decolorization and deodorization, while calcium peroxide provides oxygen through decomposition, resolving the contradiction between adsorption and oxygenation functions
3Quantity of substance
If activated carbon is used for pollutant adsorption, then decolorization and deodorization effects are improved, but the material is easily displaced by water flow due to light weight
Solution Approach 1:
The patent combines activated carbon with calcium peroxide to form a composite material that has both the adsorption properties of activated carbon and the heavier weight characteristics of calcium peroxide, thereby maintaining adsorption effectiveness while improving resistance to water flow displacement
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 resulting material effectively increases dissolved oxygen, removes pollutants like nitrogen, phosphorus, and odorous substances, restoring water transparency and ecosystem health without harming the environment.
Implementation Method 1
calcium peroxide...can release oxygen
Implementation Method 2
activated carbon...can adsorb most pollutants
Implementation Method 3
dropwise adding hydrogen peroxide solution with stirring, and after the completion of the dropwise adding, obtaining a calcium peroxide repairing material solution
Data Source
AI summary
The disclosure provides a repairing material for emergency treatment of a black and odorous surface water environment and its preparation method, belonging to the fields of environmental science and engineering technology. The preparation method of the disclosure specifically includes the following steps: (1) uniformly stirring activated carbon, calcium chloride, ammonia water solution, polyethylene glycol and water in a stirrer, then dropwise adding hydrogen peroxide, and after the completion of the dropwise adding, obtaining a calcium peroxide repairing material solution; (2) adding a sodium hydroxide solution to the calcium peroxide repairing material solution obtained in step (1) until a pH reaches 11.5, thereby obtaining a suspension; (3) centrifuging the suspension in step (2) to obtain a solid; and (4) washing the solid in step (3) with distilled water until a final pH of residual water reaches 8.4, and then drying the obtained precipitate to obtain the repairing material. The repairing material of the disclosure has good treatment effect and high efficiency.