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Resourceful treatment method of industrial wastewater containing chlorine and arsenic

A technology for industrial wastewater and treatment methods, applied in water/sewage treatment, water treatment parameter control, chemical instruments and methods, etc., can solve the problems of not considering recycling and high consumption of precipitants

Inactive Publication Date: 2020-09-04
湖南大青生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a resource-based treatment method for industrial wastewater containing chlorine and arsenic, which is used to solve the technical problem of high consumption of precipitant in wastewater treatment and no consideration of recycling in the related art

Method used

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  • Resourceful treatment method of industrial wastewater containing chlorine and arsenic

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preparation example Construction

[0065] The invention provides a preparation method of an active calcium bismuth antimony-based combined group inorganic adsorption material.

[0066] In one embodiment of the present invention, the preparation method of the active calcium bismuth antimony-based combination group inorganic adsorption material comprises the following steps:

[0067] S1, calcium oxide, bismuth oxide and antimony oxide; mixed according to the ratio of 1:1:8~1:3:20 to form a solid mixture; wherein, the calcium oxide can be CaO or Ca(OH ) 2 ; The bismuth oxide can be Bi 2 o 3 or Bi 2 o 4 ; The antimony oxide can be Sb 2 o 5 , Sb 2 o 3 or Sb 2 o 4 .

[0068] S2, mixing the solid mixture with clear water according to a solid-to-liquid ratio of 1:2 and adding to the agitator;

[0069] S3, at a temperature of 25° C. to 55° C., start the agitator to stir for 2 to 3 hours; and, during stirring, add dilute sulfuric acid with a concentration of 1% to 5% every 20 to 30 minutes to to the role of ...

Embodiment 1

[0076] S10, take 1L of chlorine-containing wastewater discharged from the iron and steel plant, detect that the chloride ion contains 25g / l of chlorine, and the pH is 6; take 100g of the adsorbent material prepared according to the aforementioned method, and add it to the chlorine-containing wastewater;

[0077] Heating and stirring the wastewater solution at the same time, the stirring time is 1.5 hours, the stirring speed is 300 rpm; the heating temperature is 40°C;

[0078] S20, filtering out the adsorption residue in the stirred solution;

[0079] S30, adding a preset amount of sulfuric acid into the filtered solution, adding a preset amount of the adsorption material again, and simultaneously starting a heating operation and a stirring operation;

[0080] S40, filtering out the adsorption residue in the stirred solution;

[0081] S50, detecting the concentration of chloride ions in the filtered solution, and judging whether the detection result meets the processing requi...

Embodiment 2

[0095] S10, take 1 liter of arsenic-containing wastewater discharged from a gold smelting company, and detect that the concentration of arsenic acid ions in it is 20.3 g / l, and the pH is 1;

[0096] Take 25 g of the adsorbent material that was analyzed and regenerated in the first step, add 35 g of the adsorbent material prepared according to the above preparation method, and add it to the arsenic-containing wastewater;

[0097] While heating the solution to 55°C, stir for about 100 minutes at a speed of 400 rpm;

[0098] S20, filtering out the adsorption residue in the stirred solution;

[0099] S30, adding a preset amount of sulfuric acid into the filtered solution, adding a preset amount of the adsorption material again, and simultaneously starting a heating operation and a stirring operation;

[0100] S40, filtering out the adsorption residue in the stirred solution;

[0101] S50, detecting the concentration of arsenate ions in the filtered solution, and judging whether ...

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Abstract

The invention discloses a resourceful treatment method of industrial wastewater containing chlorine and arsenic. The method comprises the following steps: adding a preset amount of adsorbing materialinto a wastewater solution, and starting heating operation and stirring operation at the same time; filtering out the adsorption residues in the stirred solution; adding a preset amount of sulfuric acid into the filtered solution, adding a preset amount of the adsorbing material again, and starting heating operation and stirring operation at the same time; filtering out the adsorption residues inthe stirred solution; detecting the concentration of chloride ions and / or arsenate ions in the filtered solution, and judging whether the detection result meets the treatment requirement or not; whenthe detection result meets the treatment requirement, recycling the filtered solution or discharging after reaching the standard; collecting the adsorption residues in the previous step, adding a preset amount of desorption solution, and stirring while adding an alkaline material until the pH value is kept alkaline and does not drop any more; and filtering out the desorbed and regenerated adsorbing material so as to realize the cyclic utilization of the adsorbing material.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment, in particular to a method for recycling industrial waste water containing chlorine and arsenic. Background technique [0002] If industrial wastewater enters natural water bodies without treatment, the ecosystem in the water will be seriously damaged. The continuous decline in water quality will seriously affect the fishery industry, and when it exceeds a certain level, it will even pollute the groundwater. [0003] In particular, chlorine and arsenic in industrial wastewater are seriously harmful. Chemical precipitation methods commonly used at home and abroad separate out chloride ions and arsenic acid ions in industrial wastewater, and then send the precipitated chlorine and arsenic to professional equipment or workshops for treatment to avoid Chloride and arsenate ions are excreted directly into nature. [0004] However, the existing precipitation method needs to ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/12C02F101/10
CPCC02F1/001C02F1/281C02F1/58C02F1/66C02F9/00C02F2101/103C02F2101/12C02F2209/02C02F2209/06C02F2303/16
Inventor 刘湘雄
Owner 湖南大青生态科技有限公司
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