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Method for treating heavy metal ions in water body

A heavy metal ion and treatment method technology, applied in the field of heavy metal ion treatment in water, can solve the problems of poor water solubility of polymers and little production significance

Inactive Publication Date: 2021-05-18
山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese patent 201510955070.7 discloses a high-adsorption heavy metal ion chelating agent based on nano-silica, by grafting methacrylic acid polymer on the surface of nano-silica, and modifying the polymer with dithiocarbamate, The chelating agent can adsorb a variety of heavy metal ions in a short period of time, but the methacrylate has fewer adsorption sites, and the operation process is not as simple and fast as the magnetic-based chelating agent
[0006] In the existing synthesis methods of these adsorption materials, either a large amount of waste water is generated during the synthesis, or the polymer grafted to the surface of the substrate has poor water solubility (few actual adsorption sites), and the actual production is of little significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Evenly disperse 3 g of ferric oxide microspheres with a particle size of 500 nm in 120 mL of deionized water, add 1.5 g of ascorbic acid, and heat to reflux for 4 hours. After the reaction, the product was separated with a strong magnet, washed three times with 20 mL of deionized water, and dried in vacuum to obtain ascorbic acid-modified Fe 3 o 4 @AA microspheres.

[0035] 2, 3g of the above-prepared Fe 3 o 4 The @AA microspheres were evenly dispersed in 150 mL of absolute ethanol, vacuumed and filled with nitrogen three times, and 1.5 g of silane coupling agent KH550 was added, stirred evenly at room temperature, and then refluxed for 2 hours under nitrogen protection. After the reaction, the product was separated with a high-strength magnet, washed three times with 20 mL of absolute ethanol, and dried in vacuum to obtain Fe 3 o 4 @AAKH550 microspheres.

[0036] 3. Add 2gFe 3 o 4 @AAKH550 microspheres were dispersed in 20 mL of 1 mol / L NaOH aqueous solution, ...

Embodiment 2

[0038] 1. Evenly disperse 2 grams of ferric oxide microspheres with a particle size of 100 nm in 150 mL of deionized water, add 2 grams of ascorbic acid, and heat to reflux for 5 hours. After the reaction, the product was separated with a strong magnet, washed three times with 20 mL of deionized water, and dried in vacuum to obtain ascorbic acid-modified Fe 3 o 4 @AA.

[0039] 2, 2 grams of prepared Fe 3 o 4 The @AA microspheres were uniformly dispersed in 120 mL of absolute ethanol, vacuumed and filled with nitrogen three times, and 2 g of silane coupling agent KH550 was added, stirred evenly at room temperature, and then refluxed for 2 hours under the protection of nitrogen. After the reaction, the product was separated with a high-strength magnet, washed three times with 20 mL of ethanol, and dried in vacuum to obtain Fe 3 o 4 @AAKH550.

[0040] 3. Add 2 grams of Fe 3 o 4 @AAKH550 microspheres were dispersed in 7mL of 1 mol / L NaOH aqueous solution, and 1g of carbon ...

Embodiment 3

[0042] 1. Evenly disperse 2 grams of ferric oxide microspheres with a particle size of 100 nm in 150 mL of deionized water, add 2 grams of ascorbic acid, and heat to reflux for 3 hours. After the reaction, the product was separated with a strong magnet, washed three times with 20 mL of deionized water, and dried in vacuum to obtain ascorbic acid-modified Fe 3 o 4 @AA.

[0043] 2, 2 grams of prepared Fe 3 o 4 The @AA microspheres were evenly dispersed in 120 mL of absolute ethanol, vacuumed and filled with nitrogen three times, added 2 g of silane coupling agent KH550, stirred evenly at room temperature, and refluxed for 5 hours under nitrogen protection. After the reaction, the product was separated with a high-strength magnet, washed three times with 20 mL of ethanol, and dried in vacuum to obtain Fe 3 o 4 @AAKH550.

[0044] 3. Add 2 grams of Fe 3 o 4 @AAKH550 microspheres were dispersed in 5 mL of 4mol / L NaOH aqueous solution, and 2 g of carbon disulfide was slowly a...

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Abstract

The invention discloses a method for treating heavy metal ions in a water body, which comprises the following step of: adding a heavy metal ion adsorbent into the water body to adsorb and remove the heavy metal ions in the water body. The preparation method of the heavy metal ion adsorbent comprises the following steps: modifying ascorbic acid on the surfaces of ferroferric oxide microspheres, then carrying out surface modification by using a silane coupling agent KH550, and finally reacting with sodium hydroxide and carbon disulfide to introduce sodium dithiocarbamate with strong adsorption chelation performance on the surfaces of the microspheres, thereby obtaining the heavy metal ion adsorbent. The heavy metal ion adsorbent has both magnetism and chelating sites with a strong adsorption effect, is simple to synthesize, can be conveniently operated, realizes adsorption separation of heavy metal ions Cu<2+>, Cd<2+>, Ni<2+>, Hg<2+> and the like within a short time, can realize rapid treatment in the field of heavy metal ion pollution, and has huge application potential.

Description

technical field [0001] The invention relates to a treatment method for heavy metal ions, in particular to a treatment method for heavy metal ions in water. Background technique [0002] While heavy metals bring convenience to human life, they also cause huge pollution problems to the human environment, including heavy metal pollution in groundwater, heavy metal pollution in the atmosphere, and heavy metal pollution in surface water. Due to the characteristics of difficult control and easy diffusion, water pollution can cause serious harm to the human body through the food chain, and has become an environmental pollution problem that needs to be solved urgently. [0003] Various methods are used to treat water bodies polluted by heavy metals, such as physical absorption and chemical absorption. Among them, the chemical absorption method has the advantages of low cost, easy implementation, and recyclability, which has attracted the attention of scientific researchers and has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/06B01J20/28021B01J20/28009C02F1/281C02F1/285C02F2101/20B01J2220/4806B01J2220/4812
Inventor 武羽晓袁春鸿李愼峰邢学睿
Owner 山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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