Unlock instant, AI-driven research and patent intelligence for your innovation.

Treatment method of electroplating cyanogen-containing wastewater

A treatment method and technology of cyanide waste liquid, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult to remove, ecological environment and human hazards, and achieve treatment costs Low, good removal and efficiency, pollution reduction effect

Inactive Publication Date: 2018-01-16
中新联科环境科技(安徽)有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal ions are also common toxic pollutants. Once water, soil and organisms are polluted by metal ions, it is difficult to remove them, causing serious harm to the ecological environment and human beings.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 5L of cyanide-containing waste liquid and place it in a large beaker, slowly add 30% sodium hydroxide solution to it, stir fully with a stand mixer, and continuously detect the change of pH value, when the pH is stable at 10.0, stop adding sodium hydroxide ;Place the cyanide-containing waste liquid that has adjusted the pH in the electrolytic cell, and the anode current density of the electrolytic cell is controlled at 0.4A / dm 2 , and stop the electrolysis after 1h; take out the liquid after the electrolysis is completed and filter; put the filtrate in a large beaker, slowly add 30% sodium hydroxide solution to it, stir fully with a stand mixer, and continuously detect the change of pH value , when the pH is stable at 10.2, stop adding sodium hydroxide; then add 1 g of catalyst fully rinsed with cyanide-containing waste liquid into the beaker; Oxidation treatment, the dosage of ozone is: CN - :O 3 =1:4; Stop the ozone oxidation reaction after it is fully complete...

Embodiment 2

[0024] Take 5L of cyanide-containing waste liquid and place it in a large beaker, slowly add 30% sodium hydroxide solution to it, stir fully with a stand mixer, and continuously detect the change of pH value, when the pH is stable at 10.4, stop adding sodium hydroxide ;Place the cyanide-containing waste liquid that has adjusted the pH in the electrolytic cell, and the anode current density of the electrolytic cell is controlled at 0.5A / dm 2 , and stop electrolysis after continuing for 1.5h; take out the liquid after electrolysis and filter; put the filtrate in a large beaker, slowly add 30% sodium hydroxide solution to it, stir fully with a stand mixer, and continuously check the pH value Change, when the pH is stable at 10.5, stop adding sodium hydroxide; add 1.2g of catalyst fully rinsed with cyanide-containing waste liquid to the beaker; turn on the ozone generator, place the microporous aeration head in the large beaker, Carry out ozone oxidation treatment, the dosage of o...

Embodiment 3

[0026] Take 5L of cyanide-containing waste liquid and place it in a large beaker, slowly add 30% sodium hydroxide solution to it, stir fully with a stand mixer, and continuously detect the change of pH value, when the pH is stable at 10.5, stop adding sodium hydroxide ;Place the cyanide-containing waste liquid that has adjusted the pH in the electrolytic cell, and the anode current density of the electrolytic cell is controlled at 0.5A / dm 2 , and stop the electrolysis after continuing for 1.8h; take out the liquid after the electrolysis is completed and filter; put the filtrate in a large beaker, slowly add 30% sodium hydroxide solution to it, stir it fully with a stand mixer, and continuously check the pH value Change, when the pH is stable at 10.8, stop adding sodium hydroxide; then add 2.0 g of catalyst fully rinsed with cyanide-containing waste liquid to the beaker; turn on the ozone generator, place the microporous aeration head in the large beaker, Carry out ozone oxidat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a treatment method of electroplating cyanogen-containing wastewater. Special oxide is used as a catalyst, so that ozone cyanogen breaking reaction can be more rapidly and completely finished. According to the treatment method provided by the invention, an electrolytic method and an ozone oxidization method are combined to treat the wastewater; an electrolytic treatment method has good removing effects and efficiency on the cyanogen-containing wastewater with relatively high concentration and has the principle that simple cyanide and compound cyanide in the cyanogen-containing wastewater are electrolyzed to be subjected to chemical reaction on an anode and a cathode, and cyanogen is electrolyzed and oxidized into carbon dioxide and nitrogen gas; ozone is a strong oxidant and can react with free cyanogen and complex cyanogen in the wastewater. Ozone oxidization treatment is adopted, so that the cyanide in the wastewater can reach emission standards (based on CN<->); the ozone oxidization does not cause secondary pollution and does not generate sludge and undesirable odor, so that the treatment method has a relatively great prospect.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for electroplating cyanide-containing wastewater. Background technique [0002] The cyanide-containing waste liquid mainly comes from the cyanide-containing electroplating process, which contains cyanide and metal ions. Among them, cyanide is a highly toxic substance, which can combine with ferricytochrome enzyme in the human body, making it lose the function of transmitting oxygen, thus leading to death by suffocation. Metal ions are also common toxic pollutants. Once water, soil and organisms are polluted by metal ions, it is difficult to remove them, causing serious harm to the ecological environment and human beings. The cyanide-containing waste liquid also contains gold elements, which mainly exist in the form of complex ions formed with cyanide. There are many kinds of treatment methods for cyanide-containing waste liquid, mainly including:...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/06C02F101/18C02F103/16
Inventor 吴文明高洪刚马亮陈圩刘兵李海洋王旭平唐润丰
Owner 中新联科环境科技(安徽)有限公司