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Thiolactic acid doped green rust geopolymer adsorbent and preparation method and application thereof

A geopolymer, thiolactic acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of narrow pH range, small adsorption capacity of heavy metals, and few types of heavy metals adsorbed, Achieve the effect of large adsorption capacity and simple preparation process

Active Publication Date: 2020-05-12
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the currently prepared geopolymer adsorption materials is usually not modified or modified, and there are still problems such as small heavy metal adsorption capacity, narrow pH application range, and few types of heavy metals adsorbed.

Method used

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  • Thiolactic acid doped green rust geopolymer adsorbent and preparation method and application thereof
  • Thiolactic acid doped green rust geopolymer adsorbent and preparation method and application thereof
  • Thiolactic acid doped green rust geopolymer adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Effect of Mass Ratio of Tuff Powder and Sodium Hydroxide Solution on the Heavy Metal Adsorption Performance of the Prepared Geopolymer Adsorbent

[0029] Preparation of geopolymer with thiolactic acid mixed with patina: Weigh sodium hydroxide and dissolve it in water to prepare 5M sodium hydroxide solution. Weigh the tuff, grind it, and pass through a 200-mesh sieve to get the tuff powder. According to the mass ratio of tuff powder to sodium hydroxide solution 1.05:1, 1.1:1, 1.15:1, 1.2:1, 1.35:1, 1.5:1, 1.55:1, 1.6:1, 1.65:1, the tuff powder and hydrogen The sodium oxide solution was mixed and stirred evenly to obtain nine sets of geopolymer slurries. Weigh ferrous sulfate and ferric sulfate respectively according to the molar ratio of ferrous ions and ferric ions of 2:1, and mix them to obtain a mixed ferric agent. Dilute 98% thiolactic acid with water to prepare 5% dilute thiolactic acid solution. Nitrogen gas was passed into the dilute thiolactic acid s...

Embodiment 2

[0036] Example 2 Influence of molar ratio of ferrous ions and ferric ions on the heavy metal adsorption performance of the prepared thiolactic acid mixed with patina geopolymer adsorbent

[0037] Preparation of geopolymer adsorbent with thiolactic acid mixed with patina: Weigh sodium hydroxide and dissolve it in water to prepare 10M sodium hydroxide solution. Weigh the tuff, grind it, and pass through a 300-mesh sieve to get the tuff powder. The tuff powder and the sodium hydroxide solution are mixed according to the mass ratio of the tuff powder and the sodium hydroxide solution at 1.5:1, and stirred evenly to obtain a geopolymer slurry. Weigh ferrous sulfate according to the molar ratio of ferrous ion and ferric ion 1:1, 1.5:1, 1.8:1, 2:1, 2.5:1, 3:1, 3.2:1, 3.5:1, 4:1 Mix with ferric sulfate to obtain nine groups of mixed iron preparations. Dilute 98% thiolactic acid with water to prepare nine groups of 10% dilute thiolactic acid solutions. Into the nine groups of 10% th...

Embodiment 3

[0043] Example 3 Influence of the mass ratio of ferric thiolactate ion mixed solution to geopolymer slurry on the heavy metal adsorption performance of the prepared thiolactic acid mixed with patina geopolymer adsorbent

[0044] Preparation of geopolymer adsorbent with thiolactic acid mixed with patina: Weigh sodium hydroxide and dissolve it in water to prepare 15M sodium hydroxide solution. Weigh the tuff, grind it, and pass through a 400-mesh sieve to obtain the tuff powder. The tuff powder and the sodium hydroxide solution are mixed according to the mass ratio of the tuff powder and the sodium hydroxide solution at 1.5:1, and stirred evenly to obtain a geopolymer slurry. Weigh ferrous sulfate and ferric sulfate respectively according to the molar ratio of ferrous ion and ferric ion of 3:1, and mix them to obtain a mixed ferric agent. Dilute 98% thiolactic acid with water to prepare 15% dilute thiolactic acid solution. Nitrogen gas was passed into the dilute thiolactic aci...

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Abstract

The invention discloses a thiolactic acid doped green rust geopolymer adsorbent, and a preparation method and application thereof. The preparation method comprises the following steps: mixing tuff powder and a sodium hydroxide solution and carrying out uniform stirring to obtain geopolymer slurry; introducing nitrogen into a dilute solution of thiolactic acid, then adding a mixed iron agent into the dilute solution of thiolactic acid, and carrying out stirring under a sealed condition until ferrous sulfate and ferric sulfate are completely dissolved to prepare a thiolactic acid-iron ion mixedsolution; mixing the thiolactic acid- iron ion mixed solution with the geopolymer slurry, conducting uniform stirring, and carrying out ultrasonic treatment to obtain thiolactic acid doped green rustloaded tuff slurry; and carrying out aging, crushing, grinding and sieving on the thiolactic acid doped green rust loaded tuff slurry to obtain the thiolactic acid doped green rust loaded geopolymer adsorbent. The preparation method is simple in process; and compared with a geopolymer adsorbent, the prepared thiolactic acid doped green rust loaded geopolymer adsorbent has the advantages of higherheavy metal adsorption capacity, applicability to a wide range of pH values and capability of efficiently absorbing various heavy metals.

Description

technical field [0001] The invention relates to the field of heavy metal-polluted wastewater treatment, in particular to a geopolymer adsorbent mixed with thiolactic acid and patina, a preparation method and application thereof. Background technique [0002] Heavy metal pollution in the water environment is one of the most concerned issues in the world today. Heavy metals are extremely harmful to the ecological environment. They can enter the human body through the food chain, endanger human health, and cause various diseases. At present, the heavy metal pollution rate of my country's top ten river basins is as high as 80.1%. Up to 12 million tons of grain are polluted by heavy metals to varying degrees every year. Currently, there are mainly chemical precipitation methods, ion exchange methods, adsorption methods, membrane separation methods, and bioremediation methods for the treatment of heavy metal polluted water bodies. [0003] Compared with other methods, the adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/16B01J20/22B01J20/041B01J20/0229C02F1/281C02F1/285C02F2101/20
Inventor 黄涛刘万辉宋东平金俊勋刘龙飞张树文徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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