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Method for treating high-concentration copper-containing wastewater through ph adjustment

A high-concentration, waste water technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as inability to achieve results, waste of resources, cost increase, etc., to achieve copper removal Better effect, saving resources, and reducing dosage

Inactive Publication Date: 2013-09-18
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the existing agents for treating copper in wastewater, pH has an impact on copper removal, but it is not known what the optimal pH for copper removal is, so many remove copper by adding more agents, which cannot achieve the effect and waste resources. Increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The method for treating high-concentration copper-containing wastewater by adjusting the pH value described in the embodiments of the present invention mainly consists of the following steps:

[0017] (1) First, use sodium hydroxide to adjust the pH of the wastewater to 8.5-9.5, then add polyaluminum chloride and stir for 2-5 minutes, and the dosage is 200ppm;

[0018] (2) Then, add trisodium thiocyanate and stir for 2-5 minutes, and the dosage is 50ppm;

[0019] (3) Finally, add anion and stir thoroughly for 10-20 minutes, the dosage is 4ppm, precipitate for 10-20 minutes, and then filter to detect the copper content in the filtered water, and the copper content can be obtained as 0.42mg / l.

Embodiment 2

[0021] The method for treating high-concentration copper-containing wastewater by adjusting the pH value described in the embodiments of the present invention mainly consists of the following steps:

[0022] (1) First, use sodium hydroxide to adjust the pH of the wastewater to 9.5-10.5, then add polyaluminum chloride and stir for 2-5 minutes, and the dosage is 200ppm;

[0023] (2) Then, add trisodium thiocyanate and stir for 2-5 minutes, and the dosage is 50ppm;

[0024] (3) Finally, add anion and stir thoroughly for 10-20 minutes, the dosage is 4ppm, precipitate for 10-20 minutes, and then filter to detect the copper content in the filtered water, and the copper content can be obtained as 0.25mg / l.

Embodiment 3

[0026] The method for treating high-concentration copper-containing wastewater by adjusting the pH value described in the embodiments of the present invention mainly consists of the following steps:

[0027] (1) First, use sodium hydroxide to adjust the pH of the wastewater to 10.5-11.5, then add polyaluminum chloride and stir for 2-5 minutes, and the dosage is 200ppm;

[0028] (2) Then, add trisodium thiocyanate and stir for 2-5 minutes, and the dosage is 50ppm;

[0029] (3) Finally, add anion and stir thoroughly for 10-20 minutes, the dosage is 4ppm, precipitate for 10-20 minutes, and then filter to detect the copper content in the filtered water, and the copper content can be obtained as 0.12mg / l.

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PUM

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Abstract

The invention relates to a method for treating high-concentration copper-containing wastewater through ph adjustment. The method comprises the following steps of: (1) firstly, adjusting the pH of the wastewater to be 11.5-12.5 by using sodium hydroxide, adding polyaluminum chloride and stirring for 2-5 min, wherein the dosage of the polyaluminum chloride is that the concentration of the polyaluminum chloride is 200 ppm; (2) then, adding trisodium thiocyanate trimer and stirring for 2-5 min, wherein the dosage of the trisodium thiocyanate trimer is that the concentration of the trisodium thiocyanate trimer is 50 ppm; and (3) finally, adding negative ions, thoroughly stirring for 10-20 min, precipitating for 10-20 min, filtering, and detecting the copper content of filtered water, wherein the dosage of the negative ions is that the concentration of the negative ions is 4 ppm. The method has the beneficial effects that the method has the advantages of low cost, low dosage, no secondary pollution, no production of odorous gases, and the like, and has a better removal effect on copper of various forms in water, and the copper removal ratio is high.

Description

technical field [0001] The invention relates to a copper-containing wastewater treatment technology, in particular to a method for treating high-concentration copper-containing wastewater by adjusting the pH value. Background technique [0002] With the development of smelting, metal processing, machine manufacturing, organic synthesis and other industries, the amount of wastewater discharged from industrial production is also increasing, and the content of copper ions in wastewater is also increasing. Copper-containing wastewater is extremely harmful to animals, plants and humans. If copper-containing wastewater is used to irrigate farmland, copper ions will be fixed in the roots of plants, affecting nutrient absorption and seriously affecting the growth of crops; after copper-containing wastewater enters the water body, copper can be released It is enriched in organisms and transformed into more toxic heavy metal organic compounds, which can easily enter the human body thr...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 夏志先
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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