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Preparation method of high-efficiency heavy metal ion adsorbent

A technology for heavy metal ions and adsorbents, which is applied in the field of preparation of high-efficiency heavy metal ion adsorbents and can solve problems such as difficult dehydration treatment and secondary pollution.

Inactive Publication Date: 2019-02-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high concentration of pollutants in the waste liquid, the formed sludge has a solid content of 5-10%, which is difficult to dewater, and the mud cake formed after mechanical pressure filtration or centrifugal dehydration is usually used as solid waste for landfill or incineration. Very easy to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add an appropriate amount of 300-mesh sulfonated coal to the high-concentration water-based ink printing wastewater, stir for 30 minutes, and release exchangeable ions, so that the extractable substances in the wastewater just condense into insoluble fine particles, and do not flocculate and increase. Excess hydrogen ions combine with organic amines (ammonia) in wastewater to form [R 3 NH] + , promote ion exchange, combine with sulfonated coal and partly separated linking material, and fix organic amine (ammonia) in wastewater;

[0026] (2) Stir rapidly (200r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles. At the same time, add 10g / L to the wastewater to react with the wastewater to generate tiny CO 2 The sodium bicarbonate of the bubbles makes the bubbles adhere to the fine particles in the wastewater, forming a three-phase contact interface of gas, liquid and solid between the fine particles, and ...

Embodiment 2

[0034] (1) Add an appropriate amount of 300-mesh sulfonated coal to the high-concentration water-based ink printing wastewater, stir for 20 minutes, and release exchangeable ions, so that the extractable substances in the wastewater just condense into insoluble fine particles, and do not flocculate and increase. Excess hydrogen ions combine with organic amines (ammonia) in wastewater to form [R 3 NH] + , promote ion exchange, combine with sulfonated coal and partly separated linking material, and fix organic amine (ammonia) in wastewater;

[0035](2) Quickly stir (200r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles. At the same time, add 5g / L to the wastewater to react with the wastewater to generate tiny CO 2 The sodium carbonate of the bubbles makes the bubbles adhere to the fine particles in the wastewater, forming a gas, liquid and solid three-phase contact interface between the fine particles, and control...

Embodiment 3

[0043] (1) Add an appropriate amount of crushed 200-mesh strong acidic ion exchange resin to the high-concentration water-based ink printing wastewater, and stir for 20 minutes to release exchangeable ions, so that the extractable substances in the wastewater just condense into insoluble fine particles without flocculation increase, and at the same time excess hydrogen ions combine with organic amines (ammonia) in wastewater to form [R 3 NH] + , promote ion exchange, combine with strongly acidic ion exchange resin and partly separated linking material, and fix organic amine (ammonia) in wastewater;

[0044] (2) Rapid stirring (200r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles. At the same time, add 6g / L to the wastewater to react with the wastewater to generate tiny CO 2 Potassium carbonate in the bubbles makes the bubbles adhere to the fine particles in the wastewater, forming a gas, liquid and solid three-...

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PUM

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Abstract

The invention discloses a preparation method of a high-efficiency heavy metal ion adsorbent, comprising the following steps: adding an appropriate amount of a powdery cation exchange material into high-concentration water-based ink printing wastewater, stirring and reacting; stirring and adding a chemical agent which reacts with wastewater to generate tiny CO2 bubbles; heating, carrying out thermal insulation, bonding, dehydrating and drilling; cooling with a saturated potassium hydroxide solution to make the surface of an extract to be rapidly hardened and make the extract fully adsorb potassium hydroxide; taking out the extract, cooling, drying, and carrying out high temperature carbonization activation to prepare the high-efficiency heavy metal ion adsorbent. The removal rate of variousheavy metal ions by the prepared adsorbent can reach 98% and above.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of an efficient heavy metal ion adsorbent. Background technique [0002] The discharge of industrial wastewater containing heavy metal ions seriously pollutes the environment and endangers human health. The treatment methods of wastewater containing heavy metal ions mainly include: chemical precipitation method, adsorption method, ion exchange method, biological method, etc., wherein the residual concentration of chemical precipitation method is high; biological method is not suitable for high concentration wastewater containing heavy metal ions, and has been widely accepted in application. Large limitations; ion exchange resin has the advantages of large specific surface area, good porosity, and high selective adsorption performance, but the treatment cost is high; in the adsorption method, activated carbon is the most widely use...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30C02F101/20C02F101/16C02F101/30C02F101/22
CPCB01J20/20C02F1/281C02F2101/16C02F2101/20C02F2101/22C02F2101/30C02F2103/30
Inventor 柳荣展于晓于梦楠石宝龙张宾潘颖位恒
Owner QINGDAO UNIV
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