Dimercaptopropanol modified clay mineral material, and preparation method and application thereof

A technology of dimercaptopropanol and clay minerals, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as unsatisfactory heavy metal adsorption effects and environmental hazards, and achieve effective utilization, low cost, and Good effect on material properties

Active Publication Date: 2015-04-29
广州市佳境水处理技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, most of the cationic surfactants used in organic modification are cationic surfactants with high biological toxicity, which have certain environmental hazards.
Secondly, the hydrophobicity of the material after organic modification is enhanced, and the ability to adsorb organic pollutants is increased, but the adsorption effect on heavy metals is not ideal.

Method used

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  • Dimercaptopropanol modified clay mineral material, and preparation method and application thereof
  • Dimercaptopropanol modified clay mineral material, and preparation method and application thereof
  • Dimercaptopropanol modified clay mineral material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:

[0037] (1) take 5g of vermiculite after grinding and pass through 200 mesh sieve processing and join in 100mL absolute ethanol to make the suspension that concentration is 5%, this suspension is ultrasonically treated 10min under 60 ℃ of conditions;

[0038] (2) Press n 二巯基丙醇 : m 蛭石 12.825 mmol dimercaptopropanol was added to the suspension at a ratio of = 2.565 mmol / g, then the pH of the suspension was adjusted to 1 with 0.1 mol / L HCl and NaOH, and refluxed at 80 °C for 20 h to obtain a modified product solution ;

[0039] (3) The obtained modified product solution was placed in a centrifuge at 4000 rpm for 5 min to remove the supernatant, and then the obtained precipitate was washed 6 times with absolute ethanol to make the pH value close to 7, and then vacuum-dried at 60 °C for 24 h , and grinded through a 200-mesh sieve to ...

Embodiment 2

[0044] A dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:

[0045] (1) take by weighing 5g vermiculite after grinding and pass through 200 mesh sieve processing and join in 100mL absolute ethanol to make the suspension that concentration is 5%, this suspension is ultrasonically treated 10min under 55 ℃ of conditions;

[0046] (2) Press n 二巯基丙醇 : m 蛭石Add 12.825 mmol dimercaptopropanol to the suspension at a ratio of =2.565 mmol / g, then adjust the pH of the suspension to 4 with 0.1 mol / L HCl and NaOH, and reflux at 90 °C for 20 h to obtain a modified product solution ;

[0047] (3) The obtained modified product solution was placed in a centrifuge at 4000 rpm for 10 min to remove the supernatant, and then the obtained precipitate was washed 6 times with absolute ethanol to make the pH value close to 7, and then vacuum-dried at 65 °C for 24 h , and grinded through a 200-mesh sieve to obtain...

Embodiment 3

[0051] A dimercaptopropanol modified clay mineral material adopts dimercaptopropanol to modify vermiculite, and the specific steps are as follows:

[0052] (1) take 5g of vermiculite after grinding and pass through 200 mesh sieve processing and join in 100mL absolute ethanol to make the suspension that concentration is 5%, this suspension is ultrasonically treated 10min under 60 ℃ of conditions;

[0053] (2) Press n 二巯基丙醇 : m 蛭石 Add 4.275mmol dimercaptopropanol to the suspension at a ratio of =0.855mmol / g, then adjust the pH of the suspension to 1 with 0.1mol / L HCl and NaOH, and reflux at 80°C for 20h to obtain a modified product solution ;

[0054] (3) The obtained modified product solution was placed in a centrifuge at 4000 rpm for 5 min to remove the supernatant, and then the obtained precipitate was washed 6 times with absolute ethanol to make the pH value close to 7, and then vacuum-dried at 60 °C for 24 h , and grinded through a 200-mesh sieve to obtain dimercaptoprop...

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Abstract

The invention belongs to the fields of mineral material technology and heavy metal treatment technology, and discloses a dimercaptopropanol modified clay mineral material, and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding clay mineral into anhydrous ethanol to prepare a suspension, and carrying out ultrasonic dispersion treatment on the suspension; (2) adding dimercaptopropanol into the suspension, uniformly mixing, regulating PH value to be acidic, and refluxing to react to obtain a modification product solution; and (3) centrifuging the modification product solution, washing the obtained precipitate to be meutral, drying, grinding and screening to obtain the dimercaptopropanol modified clay mineral material. The dimercaptopropanol modified clay mineral material can be used as an adsorbent for heavy metal wastewater treatment, has the advantages of low material consumption, short adsorption equilibrium time and greatly higher adsorption effect for Hg (II), and is suitable for high-efficiency removal of Hg (II) in wastewater.

Description

technical field [0001] The invention belongs to the technical field of mineral material technology and heavy metal treatment, and in particular relates to a dimercaptopropanol modified clay mineral material, a preparation method and its application in heavy metal treatment. Background technique [0002] With the process of industrialization and the continuous increase of population, water pollution caused by various factors is becoming more and more serious, especially heavy metal pollution, which has become a worldwide environmental problem. Heavy metals are a class of pollutants that are particularly harmful, among which mercury is the most toxic and is known as the first of the "five poisons". Combustion of fossil fuels such as coal and petroleum, and the discharge of wastewater from metal smelting, electrical appliance industries and other industries discharge a large amount of mercury into the atmosphere and water environment. After mercury enters the environment or eco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
CPCB01J20/12B01J20/22C02F1/281C02F1/285C02F1/288C02F2101/20
Inventor 吴平霄陈理想刘帅朱能武
Owner 广州市佳境水处理技术工程有限公司
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