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Method for treating heavy metal ion wastewater with modified shell powder

A technology of heavy metal ions and shell powder, applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of interference of natural bentonite adsorption, affecting the adsorption effect of bentonite, etc., to solve the problem of easy agglomeration and agglomeration It is not easy to disperse, the implementation cost is low, and the utilization rate is improved.

Active Publication Date: 2016-05-11
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method has the following disadvantages: (1) electroplating wastewater contains various sediments such as silt and condensate, which will interfere with the adsorption of natural bentonite; (2) natural bentonite is not treated, and the surface of natural bentonite And there are a lot of molecular water and organic matter between the layers, which will greatly affect the adsorption effect of bentonite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of shell powder

[0030] (1) Wash the shells and soak them in a hydrochloric acid solution with a mass concentration of 0.3% for 40 minutes, take them out and drain them, then calcinate them at high temperature for 2 hours, wash them with water, dry them, crush them and pass them through a 200-mesh sieve to obtain shell powder.

[0031] (2) Put the shell powder in an ethanol solution with a mass concentration of 40%, ultrasonically oscillate for 15 minutes, and then dry. The power of ultrasonic oscillation is 6W.

[0032] (2) Preparation of modified carbon nanotubes

[0033] (a) Add carbon nanotubes to chlorosulfonic acid, heat to 100°C to swell for 3 hours, cool and filter, wash the filtrate with deionized water until the pH is neutral, anneal at 2000°C for 5 hours in an argon atmosphere, and heat at 5°C The swollen carbon nanotubes were obtained after cooling down to room temperature at a cooling rate of / min.

[0034] (b) Add the swollen carbon nano...

Embodiment 2

[0040] (1) Preparation of shell powder

[0041](1) Wash the shells and soak them in a hydrochloric acid solution with a mass concentration of 0.1% for 30 minutes, take them out and drain them, then calcinate them at high temperature for 1 hour, wash them with water, dry them, crush them and pass them through a 120-mesh sieve to obtain shell powder.

[0042] (2) Put the shell powder in an ethanol solution with a mass concentration of 30%, ultrasonically oscillate for 10 minutes, and then dry. The power of ultrasonic oscillation is 4W.

[0043] (2) Preparation of modified carbon nanotubes

[0044] (a) Add carbon nanotubes to chlorosulfonic acid, heat to 80°C to swell for 1 hour, cool and filter, wash the filtrate with deionized water until the pH is neutral, anneal at 1800°C for 3 hours in an argon atmosphere, and heat at 3°C The swollen carbon nanotubes were obtained after cooling down to room temperature at a cooling rate of / min.

[0045] (b) Add the swollen carbon nanotube...

Embodiment 3

[0051] (1) Preparation of shell powder

[0052] (1) Wash the shells and soak them in a hydrochloric acid solution with a mass concentration of 0.2% for 35 minutes, take them out and drain them, then calcinate them at high temperature for 1.5 hours, wash them with water, dry them, crush them and pass them through a 180-mesh sieve to obtain shell powder.

[0053] (2) Put the shell powder in an ethanol solution with a mass concentration of 35%, ultrasonically oscillate for 12 minutes, and then dry. The power of ultrasonic oscillation is 5W.

[0054] (2) Preparation of modified carbon nanotubes

[0055] (a) Add carbon nanotubes to chlorosulfonic acid, heat to 85°C to swell for 1~3h, cool and filter, wash the filtrate with deionized water until the pH is neutral, and anneal at 1900°C for 4h in an argon atmosphere to Swelled carbon nanotubes were obtained after cooling to room temperature at a cooling rate of 4°C / min.

[0056] (b) Add the swollen carbon nanotubes to the ethanol so...

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Abstract

The invention discloses a method for treating heavy metal ion wastewater with modified shell powder, which comprises the following steps of: (1) preparing the shell powder; (2) preparing modified carbon nano tubes; (3) preparing the modified shell powder; and (4) adsorbing. According to the method for treating heavy metal ion wastewater with modified shell powder, the shell powder obtained by processing shells is taken as a main raw material, and the modified carbon nano tubes are used for modifying the shell powder to obtain the modified shell powder as an adsorption material for carrying out adsorption treatment on the heavy metal ion wastewater, so that the problem that the carbon nano tubes are easy to agglomerate and are not easy to disperse due to agglomeration is effectively solved, the adsorption effect of the shell powder is greatly improved, the process steps are simple, the operability is strong, the implementation cost is low, the adsorption effect on the heavy metal ion wastewater is good, and an effective way is provided for the aspects of improving the utilization rate of the shell powder, developing a natural adsorbent, and treating the heavy metal ion wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating heavy metal ion wastewater with modified shell powder. Background technique [0002] With the development of social economy, the demand for water is increasing, but on the one hand, my country's water resources are relatively extremely scarce, on the other hand, water pollution is quite serious, especially the heavy metal pollution caused by electroplating, metallurgy, pigments and other industries is shocking . The technologies for treating heavy metal ion wastewater include chemical precipitation, electrochemical method, adsorption method and membrane separation method; there are also some new technologies such as nanotechnology, photocatalysis, new mesoporous materials and gene treatment technology. Among them, the use of green and low-cost natural adsorbents to treat heavy metal pollution in wastewater has attracted widespread attention in r...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/20
CPCB01J20/04C02F1/281C02F2101/20
Inventor 宋凯李铁军郭远明李子孟
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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