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Preparation method of heavy metal ion adsorbent

A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, textile industry wastewater treatment, etc., can solve problems such as difficult dehydration treatment, secondary pollution, etc., to facilitate subsequent treatment and increase adsorption capacity Effect

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

[0023] (1) Add an appropriate amount of cation exchange resin crushed into 300 meshes into 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 precipitate and form insoluble fine particles without flocculation. At the same time, the excess exchangeable ions combine with the organic amine (ammonia) in the wastewater to promote ion exchange, and combine with the cation exchange resin and partially analyzed linking material to form —SO 3 — [R 3 NH] + And—COO — [R 3 NH] + , fix the organic amine (ammonia) in the wastewater, and control the pH of the wastewater after the reaction to be 4.6;

[0024] (2) Rapid stirring (240r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles, heat up, the temperature rises to 40°C and start slow variable speed stirring (starting at 60r / min), gradually release the f...

Embodiment 2

[0031] (1) Add an appropriate amount of pulverized 300-mesh sulfonated coal 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 precipitate and form insoluble fine particles without flocculation. At the same time, the excess exchangeable ions are combined with the organic amine (ammonia) in the wastewater to promote ion exchange, and combine with sulfonated coal and partially analyzed linking materials to form —SO 3 — [R 3 NH] + And—COO — [R 3 NH] + , fix the organic amine (ammonia) in the wastewater, and control the pH of the wastewater after the reaction to be 4.8;

[0032] (2) Rapid stirring (240r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles, heat up, the temperature rises to 40°C and start slow variable speed stirring (starting at 60r / min), gradually release the fine particles The...

Embodiment 3

[0039] (1) Add an appropriate amount of pulverized 300-mesh sulfonated coal to the high-concentration water-based ink printing wastewater, stir and react for 30 minutes, and release exchangeable ions, until the extractable substances in the wastewater just precipitate out to form insoluble fine particles, and do not flocculate and increase At the same time, the excess exchangeable ions combine with the organic amine (ammonia) in the wastewater to promote ion exchange, and combine with sulfonated coal and partially analyzed linking materials to form —SO 3 — [R 3 NH] + And—COO — [R 3 NH] + , fix the organic amine (ammonia) in the wastewater, and control the pH of the wastewater after the reaction to be 5.1;

[0040] (2) Rapid stirring (240r / min) to reduce the viscosity of wastewater and prevent further flocculation of the generated fine solid particles, heat up, the temperature rises to 40°C and start slow variable speed stirring (starting at 60r / min), gradually release the...

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PUM

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Abstract

The invention discloses a preparation method of a heavy metal ion adsorbent. The heavy metal ion adsorbent is mainly prepared by the following steps: in-situ aqueous phase heating and bonding of an extract in water-based ink printing wastewater, thermal insulation and pore-forming, dehydration, drying, and one-step carbonization activation. The preparation method specifically comprises the following steps: adding a cation exchange material into the high-concentration water-based ink printing wastewater, stirring and reacting, and controlling the reaction until pH of the wastewater is 3-6; heating and stirring to make the fine particles and the cation exchange material adhere to each other to form an internally porous large granular extract; carrying out thermal insulation for full bondingand deformation of the extract and shrinkage of volume and dehydration, and forming pores by a water phase; discharging water when the volume of the extract is fully shrunk, adding a saturated potassium hydroxide solution and cooling; taking out the extract, and drying at low temperature; crushing the dried extract and carrying out one-step carbonization activation under the protection of nitrogenat 600-800 DEG C for 1-4 h so as to prepare the heavy metal ion adsorbent.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a preparation method of a heavy metal ion adsorbent. The method can not only reduce the pollution load of water-based ink printing wastewater, but also realize the resource utilization of the extract. 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 selec...

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 柳荣展位恒于梦楠石宝龙潘颖张宾于晓
Owner QINGDAO UNIV
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