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A method for resource utilization of industrial copper-containing wastewater

A recycling and waste water technology, applied in chemical instruments and methods, separation methods, metallurgical waste water treatment, etc., can solve the difficulty of secondary recovery and reuse of copper resources, copper resources cannot be recycled and reused, and the demand for space area is large, etc. problems, to achieve the effect of short cycle, long duration and huge environmental benefits

Active Publication Date: 2022-06-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical methods remove copper ions in wastewater through chemical reactions. Common methods include chemical precipitation, redox, electrolysis, etc. Among them, the precipitation method has the advantages of simple operation and low treatment cost, but there are also large space requirements, secondary pollution, Problems such as incomplete treatment, oxidation-reduction and electrolysis have very high removal efficiency for copper ions, but the cost is too high due to the large amount of oxidant and large power consumption
The biological method uses microorganisms, plants, etc. to purify and repair copper-containing wastewater and sludge. This type of method is environmentally friendly and has no secondary pollution, but the treatment takes a long time and the cycle is long
The above methods can effectively treat copper-containing wastewater, but there is a prominent problem: the secondary recovery and reuse of copper resources after treatment is difficult
As an important non-ferrous metal resource, copper is widely used in mass production and life. Untreated wastewater containing copper is directly discharged into the environment or copper resources cannot be recycled after treatment, which is a serious waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The pH in the wastewater is 4, the concentration of copper ions is 166mg / L, and 200mg / L sodium sulfide (n(S):n(Cu) is 1:1) and sodium dodecylbenzenesulfonate (with the mass ratio of wastewater =1:100000) was added to the copper-containing wastewater, and the copper ions were converted into solid precipitates and separated out from the liquid phase. Use a mercury meter to measure the mercury concentration in real time. The mass flowmeter accurately controls the gas flow of each component to simulate the composition of the flue gas. The total gas flow is 1L / min, and the initial Hg 0 The concentration is 100±1μg / m 3 , in pure N 2 Hg in atmosphere 0 The removal efficiency was 100%. This example fully demonstrates that the copper-containing wastewater has excellent liquid-phase mercury removal capability after recycling.

Embodiment 2

[0029] The pH of the wastewater is 2, the concentration of copper ions is 20000 mg / L, and the mass fraction of 20% ammonium sulfide (n(S):n(Cu) is 1:4) and cetyltrimethylammonium bromide (to the mass ratio of wastewater = 1:10000) was added to the copper-containing wastewater, the copper ions were converted into solid precipitates and separated from the liquid phase, the precipitates were filtered, dried, and processed into powders and passed through a 200-mesh standard sieve, and the sieved powders were placed in In a simulated fixed bed reactor, the temperature was 50°C. Use a mercury meter to measure the mercury concentration in real time. The mass flow meter accurately controls the gas flow of each component to simulate the composition of the flue gas. The total gas flow is 1L / min, and the initial Hg 0 The concentration is 40000±10μg / m 3 , in pure N 2 Hg in atmosphere 0 The removal efficiency was 99.9%. This example fully demonstrates that the product obtained after th...

Embodiment 3

[0031]The hydrogen ion concentration in the wastewater is 8mol / L, and the copper ion concentration is 1328mg / L. The mass fraction of 30% ammonium sulfide (n(S):n(Cu) is 1:4) and sodium tripolyphosphate (with Wastewater mass ratio = 1:100) was added to copper-containing wastewater, copper ions were converted into solid precipitates and separated out from the liquid phase, the precipitates were filtered, dried, and processed into powders and passed through a 200-mesh standard sieve, and the sieved powders were placed in a simulated fixation In the bed reactor, the temperature was 75°C. Use a mercury meter to measure the mercury concentration in real time. The mass flowmeter accurately controls the gas flow of each component to simulate the composition of the flue gas. The total gas flow is 1L / min, and the initial Hg 0 The concentration is 60±1μg / m 3 , in pure N 2 Hg in atmosphere 0 The removal efficiency was 98.2%. This example fully demonstrates that the product obtained by...

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Abstract

The invention discloses a method for resource utilization of industrial copper-containing wastewater. A sulfur-containing precipitant and additives are added to the copper-containing wastewater, and free copper ions are converted into solid precipitation for precipitation, and the wastewater containing solid precipitation or solid precipitation is used for The removal of mercury, in which the copper in the solid precipitation and the copper ions attached to the surface of the precipitation cooperate to activate and oxidize the mercury in the mercury-containing flue gas or mercury-containing wastewater, and because of the strong affinity between elemental sulfur and mercury Sulfur in solid precipitation can fix the activated and oxidized mercury into stable mercury sulfide, realize the removal of mercury, and effectively reduce the copper content in wastewater. This method realizes the effective removal of mercury in the flue gas, and at the same time solves the environmental problems caused by copper-containing wastewater, treats waste with waste, turns waste into treasure, is green and sustainable, has low cost of mercury removal, high efficiency, simple process, and is suitable for It provides a new way of thinking for the resource utilization of industrial copper-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment technology and pollution control technology, and in particular relates to a method for resource utilization of industrial copper-containing wastewater. Background technique [0002] Copper-containing wastewater is a typical heavy metal wastewater, mainly from copper smelting, electroplating processing, printing and dyeing, mining, printed circuit board manufacturing and other industries. Copper smelting process is one of the main sources of copper-containing wastewater. Copper-containing wastewater will be generated during copper smelting flushing, condensation, absorption, flue gas purification, and workshop and equipment cleaning processes. The direct discharge of untreated industrial copper-containing wastewater will bring a series of serious negative impacts on the sustainable development of the ecosystem and society. [0003] The direct discharge of copper-containing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/62C02F1/54C02F1/52C02F1/56C01G3/12B01D53/86C01G13/00B01D53/64C02F1/72C02F101/20C02F103/16
CPCC02F1/62Y02W10/10
Inventor 李海龙孟凡悦杨建平屈文麒杨泽群
Owner CENT SOUTH UNIV
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