Method for recycling heavy metal ion in water body by utilizing ion chelate fiber

A technology of heavy metal ions and chelated fibers, which is applied in the field of heavy metal ions, can solve the problems of slow adsorption rate, high power consumption of electrolysis, and short service life of adsorbent, and achieve fast adsorption speed, high adsorption capacity and fast elution speed Effect

Active Publication Date: 2010-06-23
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method is used to treat heavy metal wastewater. The process is simple, the technology is mature, the treatment cost is low, and the adaptability is strong. The disadvantage is that it occupies a large area and produces heavy metal sludge. If the sludge is not properly treated, it will cause secondary pollution.
The electrolysis process is simple, the floor space is small, and the recovered metals are of high purity, but the electrolysis method consumes a lot of electricity and the effluent quality is poor, so it is suitable for the treatment of high-concentration wastewater
Chinese patent CN1904142 discloses a method for extracting copper from etching waste liquid or low-copper-containing wastewater, using an extractant to extract copper-containing wastewater. This method is simple to operate and can recover copper. The disadvantage is that the regeneration of the extractant is inconvenient and the cost is high.
Adsorption method is used to treat wastewater containing heavy metals. The adsorbent has a wide range of sources, low cost, convenient operation and good adsorption effect, but the service life of the adsorbent is short, regeneration is difficult, and heavy metal ions are difficult to recover.
Ion exchange method is a method that has developed rapidly in recent years, but one of its main exchange materials—ion exchange resin has high cost, slow adsorption rate and certain restrictions on water quality. For example, organic matter and oxides in wastewater will Make the resin invalid, etc., and its application also has certain limitations
[0004] In addition, most of the above methods are to treat industrial wastewater before it is discharged, so that the heavy metal content reaches the discharge target, while for natural water bodies that have been polluted by heavy metal ions, such as ponds and lakes polluted by industrial wastewater and near heavy metal deposits Surface water, etc., there is no suitable method and equipment for treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) filling the ion chelating fiber containing amine into a rectangular frame made of plastic material to make a reaction module;

[0023] 2) The prepared reaction module is directly put into the water body of industrial wastewater for adsorption, and the reaction module enters the regeneration zone after the adsorption is completed, and then pickling, water washing, alkali regeneration and water washing are carried out successively for regeneration;

[0024] 3) After the regeneration is completed, the reaction module returns to the water body of industrial wastewater to complete a cycle, and then the reaction module continues to adsorb, forming a continuous process of the reaction module adsorbing and recovering heavy metal ions.

[0025] The pickling process in above-mentioned steps 2) adopts concentration to be the dilute hydrochloric acid of 0.6mo / L;

[0026] The alkali regeneration process in the above step 2) uses ammonia water with a concentration of 0.5mo / L.

Embodiment 2

[0028] 1) filling the ion chelating fiber containing amidoxime group into a fan-shaped frame made of metal material to make a reaction module;

[0029] 2) The prepared reaction module is installed in the adsorption zone equipped with the water body to be treated for adsorption;

[0030] 3) After the reaction module is adsorbed in the adsorption zone, it enters the regeneration zone, and then undergoes acid washing, water washing, alkali regeneration and water washing for regeneration;

[0031] 4) After the regeneration is completed, the reaction module returns to the adsorption area to complete a cycle, and then the reaction module continues to adsorb, forming a continuous process of the reaction module's adsorption and recovery of heavy metal ions.

[0032] The pickling process in above-mentioned steps 3) adopts concentration to be the dilute sulfuric acid of 0.3mo / L;

[0033] The alkali regeneration process in the above step 3) adopts ammonia water with a concentration of 0...

Embodiment 3

[0035] 1) The ion chelating fiber containing amide group is directly made into a circular reaction module;

[0036] 2) Put the prepared reaction module directly into the polluted water body for adsorption;

[0037] 3) After the adsorption of the reaction module is completed, it enters the regeneration zone for regeneration. In the regeneration zone, there are pickling, water washing, alkali regeneration and water washing in sequence;

[0038] 4) After the regeneration is completed, the reaction module returns to the adsorption area to complete a cycle, and then the reaction module continues to adsorb, forming a continuous process of the reaction module's adsorption and recovery of heavy metal ions.

[0039] The pickling process in above-mentioned steps 3) adopts concentration to be 0.6mo / L dilute nitric acid;

[0040] The alkali regeneration process in the above step 3) uses ammonia water with a concentration of 0.5mo / L.

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PUM

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Abstract

The invention relates to a method for recycling heavy metal ion in water body by utilizing ion chelate fiber, belonging to the environmental protection technical field. Ion chelate fiber is prepared into a reaction module; the prepared reaction module is arranged in absorption region of water body to be treated for absorption; the reaction module enters into regeneration region to be regenerated after completing absorption in the absorption region, and the regeneration region includes pickling, washing, alkali regeneration and washing sequentially; after regeneration is completed, the reaction module returns to the absorption region to complete one cycle and then continues absorption, thus forming the continuous process of absorbing and recycling heavy metal ion by the reaction module. The water discharged after the process meets the requirement of 'integrated wastewater discharge standard'. The invention has fast absorption speed, high absorption capacity and high treatment efficiency; elution speed in pickling process is fast, and regeneration speed is fast; the heavy metal ion recycling technology of the invention is simple, equipment is easy to operate, total energy consumption of the process is low, investment is less, and quick returns can be obtained.

Description

technical field [0001] The invention relates to a method for absorbing and recovering heavy metal ions in water by using ion chelating fibers, which belongs to the technical field of environmental protection. Background technique [0002] With the development of electroplating, mining, smelting, electronics, chemical industry and other industries, the application of heavy metals is becoming more and more extensive, and the discharge of heavy metal wastewater is also increasing. Excessive heavy metals are extremely harmful to the human body. For example, excessive trivalent chromium can easily accumulate in the alveoli and cause lung cancer; excessive copper can promote liver cirrhosis; excessive nickel can cause headaches, nausea, even high fever, and difficulty breathing. Therefore, the treatment of heavy metal wastewater has attracted more and more attention, and the treatment technology of heavy metal wastewater has also been continuously developed. [0003] For the trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/22
Inventor 宋春丽陈兆文范海明张琴管迎梅翟密橙黄华尧
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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