Resource recycling application of heavy metals in wastewater

A technology of heavy metal ions and recovery agents, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as waste of precious resources, endangering human health, and endangering health, and achieves a good positioning effect, easily reverted effect

Inactive Publication Date: 2015-04-29
上海源育节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, if the discharge of heavy metal wastewater is not treated, a large amount of heavy metal-containing wastewater will be discharged into lakes, oceans, and soils. It will be bio-enriched and enter the human body through the food chain, seriously endangering human health.
At the same time, heavy metals are often non-renewable resources. The massive discharge of heavy metal wastewater not only pollutes the environment, endangers people's health and destroys the ecological environment, but is also a waste of precious resources.

Method used

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  • Resource recycling application of heavy metals in wastewater
  • Resource recycling application of heavy metals in wastewater
  • Resource recycling application of heavy metals in wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve 360g of polyacrylamide in 300g of deionized water, add 270g of sodium methoxide solution dissolved in 100g of deionized water, mix and stir, then slowly add 380g of carbon disulfide, mix and stir, control the temperature not higher than 80°C and stir until the reaction temperature and room temperature When corresponding, stop stirring, that is a heavy metal ion recovering agent. (approximately equal to polyacrylamide monomer: Na + : CS 2 The molar ratio is 1:1:1)

[0042] The heavy metal ion recovery agent prepared above is directly mixed and stirred with the waste water whose type and content of heavy metals have been confirmed by analysis. After the heavy metal ions are tested to meet the standard, the waste water can be discharged, and the precipitates that have absorbed heavy metal ions are collected for resource recycling.

[0043] The above-mentioned precipitate that has absorbed heavy metal ions is prepared into a suspension, and lithium aluminum tetra...

Embodiment 2

[0045] Dissolve 366g of polyacrylamide in 400g of deionized water, add 200g of sodium hydroxide solution dissolved in 400g of deionized water, mix and stir, then slowly add 380g of carbon disulfide, mix and stir, control the temperature not higher than 80°C and stir until the reaction temperature is equal to When the room temperature is equal, stop stirring, it is a heavy metal ion recovery agent. (approximately equal to polyacrylamide monomer: Na + : CS 2 The molar ratio is 1:1:1)

[0046] The main heavy metals in a metallurgical wastewater are: Cd, Co, Cu, Ni, Pb. The pH value of the waste water is 2.5. After the impurities in the waste water are precipitated, the supernatant is analyzed and measured for the concentration of heavy metals. After adding 10 g / L of the heavy metal ion recovery agent prepared above and stirring for 5 minutes, the heavy metal concentration is detected after filtering the flocculent precipitate. As shown in the following table:

[0047] ...

Embodiment 3

[0051] Dissolve 780g of polyacrylamide in 400g of deionized water, add 224g of potassium hydroxide solution dissolved in 560g of deionized water, mix and stir, then slowly add 380g of carbon disulfide, mix and stir, control the temperature not higher than 80°C and stir until the reaction temperature is equal to When the room temperature is equal, stop stirring, it is a heavy metal ion recovery agent. (approximately equal to polyacrylamide monomer: K + : CS 2 The molar ratio is 2:0.8:1)

[0052]The heavy metal ion recovery agent prepared above is directly mixed and stirred with the waste water whose type and content of heavy metals have been confirmed by analysis. After the heavy metal ions are tested to meet the standard, the waste water can be discharged, and the precipitates that have absorbed heavy metal ions are collected for resource recycling.

[0053] The above-mentioned precipitate that has absorbed heavy metal ions is prepared into a suspension, and nanometer zero-v...

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Abstract

A heavy metal ion recycling agent is characterized by comprising a compound represented as a structural formula shown in the specification, wherein R1 is selected from an alkyl group, a derivative of the alkyl group, an amino group, a derivative of the amino group, an aryl group and a derivative of the aryl group, and the number of hydrogen atoms in the components and the number of carbon atoms in the components are smaller than 6; n is an integer larger than or equal to 50; M adopts K, Na, Li or NH4. The heavy metal ion recycling agent in water can form a stable heavy metal ion chelate in a cross-linked network shape with divalent and/or trivalent heavy metal ions, and flocculent precipitate is formed to facilitate separation and recycling, that is, the heavy metal ions in the wastewater can be recycled. Besides, the wastewater containing the heavy metal ions can be discharged up to the standard, and heavy metal can be recycled from the separated heavy metal ion chelate after reduction treatment.

Description

technical field [0001] The invention relates to the technical field of resource recovery, in particular to a heavy metal ion recovery agent and its manufacturing method and application. Background technique [0002] Heavy metal wastewater is wastewater discharged in industrial production processes such as mining and metallurgy, mechanical processing, chemical industry, electronics, and instrumentation. Heavy metal wastewater is a type of industrial wastewater that seriously pollutes the environment and is extremely harmful to humans, animals and plants. The main pollutants include cadmium, nickel, copper, chromium, mercury, lead, etc. With the rapid development of domestic industry, a large amount of industrial wastewater containing heavy metal ions is discharged into the water body, and then enters the soil, and then enters the human body through biological enrichment and circulation. [0003] According to relevant statistics, in 2012, the domestic ferrous metal mining and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/56C08F8/42C08F8/34C02F1/56C02F1/62
Inventor 谭群华张乃庆
Owner 上海源育节能环保科技有限公司
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