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Method for efficiently removing cadmium in seawater with modified montmorillonite

A technology of montmorillonite and montmorillonite powder, applied in seawater treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as complex components, achieve high removal efficiency, purify seawater, and reduce the concentration of cadmium

Active Publication Date: 2019-01-04
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition of seawater, which is completely different from freshwater, there are very few research results on the treatment of heavy metal cadmium pollutants in seawater.

Method used

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  • Method for efficiently removing cadmium in seawater with modified montmorillonite
  • Method for efficiently removing cadmium in seawater with modified montmorillonite
  • Method for efficiently removing cadmium in seawater with modified montmorillonite

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for efficiently removing cadmium in seawater by using modified montmorillonite, comprising the steps of:

[0025] (1) Get montmorillonite and pulverize, cross 80 mesh sieves, obtain montmorillonite powder;

[0026] (2) Take by weighing montmorillonite powder, hexadecyltrimethylammonium (HDTMA), ammonium pyrrolidinedithioformate (APDC), sodium diethylaminodithioformate (DDTC), the contents of each component The weight ratio is montmorillonite powder: cetyltrimethylammonium: ammonium pyrrolidinedithioformate: sodium diethylaminodithioformate = 4:6:0.5:0.5, grind and mix evenly to obtain montmorillonite Stone mixture; transfer the montmorillonite mixture into a medium-energy electron accelerator for irradiation treatment, the output energy of the electron beam is 1.0MeV, the output power is 50KW, and the transmission speed of the montmorillonite mixture is 4m / min.

[0027] (3) adding water to the montmorillonite mixture after irradiation treatment to make it into...

Embodiment 2

[0031] A method for efficiently removing cadmium in seawater by using modified montmorillonite, comprising the steps of:

[0032] (1) Get montmorillonite and pulverize, cross 60 mesh sieves, obtain montmorillonite powder;

[0033] (2) Take by weighing montmorillonite powder, hexadecyltrimethylammonium (HDTMA), ammonium pyrrolidinedithioformate (APDC), sodium diethylaminodithioformate (DDTC), the contents of each component The weight ratio is montmorillonite powder: cetyltrimethylammonium: ammonium pyrrolidine dithioformate: sodium diethylaminodithioformate = 5:8:0.6:0.5, grind and mix evenly to obtain montmorillonite Stone mixture; transfer the montmorillonite mixture into a medium-energy electron accelerator for irradiation treatment, the output energy of the electron beam is 0.8MeV, the output power is 30KW, and the transmission speed of the montmorillonite mixture is 5m / min.

[0034] (3) adding water to the montmorillonite mixture after irradiation treatment to make it int...

Embodiment 3

[0038] A method for efficiently removing cadmium in seawater by using modified montmorillonite, comprising the steps of:

[0039] (1) Get montmorillonite and pulverize, cross 100 mesh sieves, obtain montmorillonite powder;

[0040](2) Take by weighing montmorillonite powder, hexadecyltrimethylammonium (HDTMA), ammonium pyrrolidinedithioformate (APDC), sodium diethylaminodithioformate (DDTC), the contents of each component The weight ratio is montmorillonite powder: cetyltrimethylammonium: ammonium pyrrolidinedithioformate: sodium diethylaminodithioformate = 2:4:0.3:0.4, grind and mix evenly to obtain montmorillonite Stone mixture; transfer the montmorillonite mixture into a medium-energy electron accelerator for irradiation treatment, the output energy of the electron beam is 1.5MeV, the output power is 60KW, and the transmission speed of the montmorillonite mixture is 3m / min.

[0041] (3) adding water to the montmorillonite mixture after irradiation treatment to make it into...

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Abstract

The invention discloses a method for efficiently removing cadmium in seawater with modified montmorillonite and belongs to the field of seawater pollution treatment. The method comprises the steps asfollows: (1) crushing montmorillonite to obtain montmorillonite powder; (2) weighing the montmorillonite powder, HDTMA (hexadecyl trimethylammonium), APDC (ammonium pyrrolidinedithiocarbamate) and DDTC (sodium diethyldithiocarbamate), grinding and then, uniformly mixing the mixture to obtain montmorillonite mixture; (3) adding water to the montmorillonite mixture to become paste, uniformly stirring the paste, and drying the paste to obtain a dried substance; (4) grinding the dried substance, performing sieving with a 60-100 mesh sieve to obtain modified montmorillonite; (5) adding the modifiedmontmorillonite to seawater polluted by cadmium. The heavy metal cadmium in the seawater can be efficiently removed with the method.

Description

technical field [0001] The invention relates to a seawater pollution treatment method, in particular to a method for efficiently removing cadmium in seawater by using modified montmorillonite. Background technique [0002] With the development of my country's industrial industry, the accompanying industrial wastewater is also increasing. Industrial wastewater is continuously discharged into rivers through sewage pipes, and finally into the ocean. The heavy metals in industrial wastewater pollute the marine environment more and more seriously. According to analysis, heavy metal cadmium pollutants in seawater not only have the characteristics of strong toxicity, bioaccumulation and long-distance migration, but also cadmium itself and its compounds cannot be chemically decomposed and biodegraded, and can only undergo morphological transformation or dispersion, enrichment, or even It may be converted into more toxic metal compounds, which is very harmful. The existence of cadmiu...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/22B01J20/30C02F101/20C02F103/08
CPCB01J20/12B01J20/22B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F2101/20C02F2103/08
Inventor 赖俊翔戴圣生梁千千陈丽雯马志升雷富许铭本张荣灿姜发军庄军莲
Owner GUANGXI ACAD OF SCI