High-efficiency heavy metal ion adsorbent

A heavy metal ion and adsorbent technology, which is applied in the field of high-efficiency heavy metal ion adsorbent and its preparation, can solve the problems of secondary pollution, difficult dehydration treatment, etc., and achieve the effects of preventing flocculation from increasing, facilitating full bonding, and improving adsorption capacity

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 solid content of the formed sludge is as high as 5-10%, which is difficult to dewater, and the mud cake formed after mechanical dehydration is usually landfilled or incinerated as solid waste, which is very easy to cause secondary pollution. Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add an appropriate amount of 98% concentrated sulfuric acid to the high-concentration water-based ink printing wastewater, and stir for 10 minutes to reduce the solubility of the water-soluble polymer binder and destroy the stability of the binder until the extractable substances in the wastewater are just condensed into Insoluble fine particles, and do not flocculate to increase, and at the same time, excess hydrogen ions combine with organic amine (ammonia) in wastewater, and combine with precipitated part of the linking material to form - COO — [R 3 NH] + , fixing organic amines (ammonia) in wastewater;

[0026] (2) Stir rapidly (200r / min) to prevent further flocculation of the generated fine solid particles. At the same time, add 10g / L sodium bicarbonate to the wastewater to generate tiny bubbles, so that the bubbles adhere to the fine solid particles in the wastewater. A three-phase contact interface of gas, liquid and solid is formed between the solid partic...

Embodiment 2

[0034] (1) Add an appropriate amount of sulfonated coal to the high-concentration water-based ink printing wastewater, and stir for 15 minutes to reduce the solubility of the water-soluble polymer binder and destroy the stability of the binder until the extractable substances in the wastewater are just condensed into insoluble fine particles. Particles, without flocculation and increase, at the same time, excess hydrogen ions combine with organic amine (ammonia) in wastewater, combine with precipitated part of binder and sulfonated coal to form -SO 3 — [R 3 NH] + And—COO — [R 3 NH] + , fixing organic amines (ammonia) in wastewater;

[0035](2) Stir rapidly (300r / min) to prevent further flocculation of the generated fine solid particles, and at the same time add 5g / L sodium carbonate to the wastewater to generate tiny CO 2 Bubbles make the bubbles adhere to the fine solid particles in the wastewater, forming a three-phase contact interface of gas, liquid and solid between...

Embodiment 3

[0043] (1) Add an appropriate amount of 50% hydrochloric acid to the high-concentration water-based ink printing wastewater, and stir for 5 minutes to reduce the solubility of the water-soluble polymer binder and destroy the stability of the binder until the extractable substances in the wastewater just condense into insoluble Fine particles, without flocculation and increase, at the same time, excess hydrogen ions combine with organic amine (ammonia) in wastewater, and combine with precipitated part of the linking material to form -COO — [R 3 NH] + , fixing organic amines (ammonia) in wastewater;

[0044] (2) Stir rapidly (300r / min) to prevent further flocculation of the generated fine solid particles, and at the same time add 8g / L potassium carbonate to the wastewater to react with the wastewater to generate tiny CO 2 Bubbles make the bubbles adhere to the fine solid particles in the wastewater, forming a three-phase contact interface of gas, liquid and solid between the f...

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Abstract

The invention discloses a high-efficiency heavy metal ion adsorbent, which is characterized in that the high-efficiency heavy metal ion adsorbent is prepared from a binder, a pigment, a nitrogen-containing compound, etc. extracted from water-based ink printing wastewater. The adsorbent is prepared by the following specific steps: extracting with an aqueous phase, heating, bonding and drilling, dehydrating, drying, and one-step carbonization activation. In the preparation process, new bubble blocking, water phase transformation, ultrasonic treatment and other methods are adopted. in the extraction process, the extract is heated and bonded, shrunk and dehydrated, and the extract becomes a porous material; and then through high temperature carbonization activation, the adsorption effect of heavy metal ions is enhanced, and the removal rate of various heavy metal ions can reach 95% and above.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an efficient heavy metal ion adsorbent and a preparation method thereof. Background technique [0002] The discharge of 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 used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30C02F101/20C02F101/16C02F101/30C02F101/22
CPCB01J20/20C02F1/281C02F2101/16C02F2101/20C02F2101/22C02F2101/30C02F2103/30
Inventor 柳荣展于梦楠石宝龙张宾潘颖于晓
Owner QINGDAO UNIV
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