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Bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of bentonite composite material

A composite material and cyanide wastewater technology, which is applied in energy wastewater treatment, physical/chemical process catalysts, water pollutants, etc., can solve the problems of low solar energy utilization rate and not widely used titanium dioxide, and meet the requirements of loose reaction conditions, Ease of operation and improved utilization

Inactive Publication Date: 2016-07-13
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of titanium dioxide is not very extensive. This is mainly due to the relatively wide band gap of titanium dioxide, which can only absorb light with longer wavelengths such as ultraviolet rays, and has a low utilization rate of solar energy.

Method used

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  • Bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of bentonite composite material
  • Bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of bentonite composite material
  • Bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of bentonite composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add butyl titanate, absolute ethanol, and concentrated nitric acid into a three-necked flask, stir for 30 minutes, and mix well to obtain mixture A; wherein the volume ratio of butyl titanate, absolute ethanol, and concentrated nitric acid is 20:40 :1;

[0037] (2) Dissolve lanthanum nitrate hexahydrate in deionized water, add concentrated nitric acid and mix evenly, then add absolute ethanol and mix evenly to obtain mixture B; the volume ratio of deionized water, concentrated nitric acid, and absolute ethanol is 5:0.5 :20; the mol ratio of La and Ti is 1:100 in step (2); the mass ratio of lanthanum and deionized water is 24:1000.

[0038] (3) Under the stirring condition of 200rpm, the mixture B was added dropwise to the mixture A at a rate of 1 drop / second to obtain the mixture C. After the addition was completed, the mixture C was continued to be stirred for 30 minutes to obtain a milky white liquid;

[0039] (4) add bentonite to the milky white liquid that step...

Embodiment 2

[0048]Experiments were carried out by changing different roasting temperatures. The roasting temperatures were 300°C, 400°C, 500°C and 600°C respectively, and four different samples were obtained, and then the prepared samples were used to carry out photocatalysis experiments on cyanide-containing wastewater, and the results were as follows: table 3. All the other are as embodiment 1. The original soil of bentonite and 4 bentonite composite materials obtained in embodiment 2 are carried out to XRD detection respectively, as image 3 shown.

[0049] Table 3 Example 2 Catalytic adsorption effect table

[0050] Calcination temperature / ℃

Embodiment 3

[0052] Experiments were carried out by changing different roasting times. The roasting time was 30min, 60min, 90min, 120min, 150min and 180min respectively, and different samples were obtained, and then the prepared samples were used to carry out photocatalytic experiments on cyanide-containing wastewater, and the results are shown in Table 4. . All the other are as embodiment 1.

[0053] Table 4 Example 3 Catalytic adsorption effect table

[0054] Roasting time / min

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Abstract

The invention relates to a bentonite composite material for treating high-zinc and copper cyaniding wastewater and application of the bentonite composite material, and belongs to the technical field of wastewater treatment.The preparation method of the bentonite composite material comprises the following steps: mixing butyl titanate, absolute ethyl alcohol and concentrated nitric acid to obtain a mixture A; dissolving lanthanum nitrate hexahydrate in deionized water, adding the concentrated nitric acid, and then adding the absolute ethyl alcohol to obtain a mixture B; dropwise adding the mixture B in the mixture A to obtain a mixture C, and after dropwise adding is finished, continuing stirring to obtain milky liquid; adding bentonite and the deionized water in the milky liquid to obtain a mixture D; and settling, evaporating to dryness, grinding, sieving, roasting, and cooling to room temperature to obtain the bentonite composite material.The titanium dioxide is generated in a reaction process, the generated titanium dioxide is loaded on the bentonite, high-zinc and copper cyaniding wastewater in the gold industry is treated through modification, cyanogens in the cyanide-containing wastewater can be degraded and heavy metal ions are effectively adsorbed.

Description

technical field [0001] The invention relates to a bentonite composite material for treating high-zinc and copper cyanide wastewater and an application thereof, belonging to the technical field of wastewater treatment. Background technique [0002] The cyanide-containing wastewater in the gold industry mainly contains cyanide, and depending on the ore composition, it also contains zinc and copper heavy metal ions, and these heavy metal ions and cyanide will form complex ions. Since cyanide is highly toxic, it cannot be discharged directly. There are many methods for treating cyanide-containing wastewater, such as chlor-alkali oxidation, sulfur dioxide air oxidation, hydrogen peroxide oxidation, biochemical decomposition, acidification, and ion exchange. However, these methods are not ideal for treating cyanide-containing wastewater. [0003] Titanium dioxide is widely used in the treatment of liquid waste or toxic wastewater. It has excellent properties such as good thermal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F1/30B01J21/06B01J23/10C02F101/20
CPCB01J20/06B01J20/12C02F1/281C02F1/30B01J21/063B01J23/10C02F2101/20B01J2220/42B01J35/39Y02W10/37
Inventor 张亚莉王青龙赵景刚宫本奎李德刚杨宝书王晓亮曹旭赵萍萍
Owner SHANDONG UNIV OF TECH
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