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Method for preparing copper-containing waste water treatment agent through compound modification of fly ash

A wastewater treatment agent and composite modification technology, which is used in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of unsatisfactory treatment effect, secondary pollution and high operating cost , to achieve the effect of remarkable treatment effect, simple operation and cost reduction.

Inactive Publication Date: 2016-07-13
CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: In view of the current process of treating copper-containing wastewater, although the traditional chemical method has low cost and good effect, it will cause secondary pollution, while membrane separation treatment will not cause secondary pollution, but the operation The cost is very high. Although the other adsorption method is low in cost and simple in treatment, the treatment effect is extremely unsatisfactory. A method is provided by modifying the fly ash obtained from the pretreatment, and heating it with copper grass root pulp and ethanol to obtain The centrifuged supernatant is mixed, and air-dried after microwave reaction and filtration to obtain composite modified fly ash. The method for preparing copper-containing wastewater treatment agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First, according to the solid-liquid ratio of 1:2, take fly ash and water, stir at 150r / min for 30min, then let it stand until no solid particles sink, remove impurities floating on the water surface, filter, collect the filtrate, and filter the filtrate Mix evenly with calcium carbonate at a mass ratio of 3:1, put it into a calciner, calcinate at 600°C for 1 hour, cool down to room temperature with the furnace, put the calcined product into a pulverizer for crushing, and pass through a 100-mesh sieve to obtain pretreatment Fly ash; then the above-mentioned pretreated fly ash and the sulfuric acid solution with a mass fraction of 92% are mixed uniformly at a solid-to-liquid ratio of 1:3, put into a glass reactor, set the temperature at 70 ° C, and keep the temperature for 10 minutes. Add sulfuric acid solution volume 40% in the reaction kettle, the mass fraction is 30% hydrogen peroxide solution, use nitrogen to discharge the air in the reaction kettle, stir and react wi...

example 2

[0021] First, according to the solid-liquid ratio of 1:2, take fly ash and water, stir at 150r / min for 35min, then let it stand until no solid particles sink, remove impurities floating on the water surface, filter, collect the filtrate, and filter the filtrate Mix evenly with calcium carbonate at a mass ratio of 3:1, put it into a calciner, calcinate at 600°C for 1.5h, cool down to room temperature with the furnace, put the calcined product into a pulverizer for crushing, and pass through a 100-mesh sieve to obtain a pre-calcined product. Treat the fly ash; then mix the pretreated fly ash obtained above with the sulfuric acid solution with a mass fraction of 92% at a solid-to-liquid ratio of 1:3, put it into a glass reactor, set the temperature at 75°C, and keep it warm for 13 minutes , add sulfuric acid solution volume 43% mass fraction in the reaction kettle and be 30% hydrogen peroxide solution, use nitrogen to discharge the air in the reaction kettle, stir and react with 1...

example 3

[0024] First, according to the solid-liquid ratio of 1:2, take fly ash and water, stir at 150r / min for 40min, then let it stand until no solid particles sink, remove impurities floating on the water surface, filter, collect the filtrate, and filter the filtrate Mix evenly with calcium carbonate at a mass ratio of 3:1, put it into a calciner, calcinate at 600°C for 2 hours, cool down to room temperature with the furnace, put the calcined product into a pulverizer for crushing, and pass through a 100-mesh sieve to obtain pretreatment Fly ash; then the above-mentioned pretreated fly ash and the sulfuric acid solution with a mass fraction of 92% are mixed uniformly at a solid-to-liquid ratio of 1:3, put into a glass reactor, set the temperature at 80 ° C, and keep the temperature for 15 minutes. Add sulfuric acid solution volume 45% to the reaction kettle with a mass fraction of 30% hydrogen peroxide solution, use nitrogen to discharge the air in the reaction kettle, and stir and r...

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Abstract

The invention discloses a method for preparing a copper-containing waste water treatment agent through compound modification of fly ash, and belongs to the technical field of preparation of waste water treatment agents.The method comprises the steps that fly ash obtained after pretreatment is conducted is modified, the modified fly ash is mixed with centrifugal supernatant obtained after heating is conducted on copper-containing grassroot pulp and ethanol, the mixture is subjected to a microwave reaction, filtering and air-drying, and therefore the copper-containing waste water treatment agent is prepared through compound modification of the fly ash.It is proved through examples that the method is easy and convenient to operate, the raw materials are easy to obtain, the operation cost is reduced, no secondary pollution is caused in the preparation process, the method belongs to a green and environment-friendly technology, the treating effect on copper-containing waste water is significant, and the removal rate of the copper content in the copper-containing waste water reaches 95% or above.

Description

technical field [0001] The invention discloses a method for preparing a copper-containing wastewater treatment agent by compound modified fly ash, and belongs to the technical field of wastewater treatment agent preparation. Background technique [0002] Copper is the most common and widely used toxic heavy metal, which mainly comes from industrial wastewater such as metal processing, electroplating, papermaking, oil refinery mud, wood preservatives, and chemical fertilizers. Copper is an essential trace element for life, but excessive copper is harmful to human body, animals and plants. Excessive intake of copper by the human body can cause liver and central nervous system poisoning, and copper salts are more toxic, and 10g of copper salts can be fatal. When the copper content in water reaches 0.01mg / L, it will have a significant inhibitory effect on the self-purification of the water body. If it exceeds 3mg / L, there will be peculiar smell, and if it exceeds 15mg / L, it wil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/20C02F1/283
Inventor 郭伟明张明宋奇
Owner CHANGZHOU C PE PHOTO ELECTRICITY SCI & TECHN
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