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Magnetic biochar quantum dot composite adsorbent as well as preparation method and using method thereof

A biochar and adsorbent technology, applied in chemical instruments and methods, separation methods, alkali metal compounds, etc., can solve problems such as poor mechanical properties and limited heavy metal adsorption performance, and achieve the effect of convenient use and low price

Active Publication Date: 2014-07-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These adsorbents have disadvantages such as limited heavy metal adsorption performance or poor mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for an adsorbent of a magnetic biochar quantum dot composite for removing heavy metals, comprising the following steps:

[0029] Sieve the prepared biochar to 115 mesh; weigh 1g of biochar and place it in 100mL triethylene glycol solution, ultrasonicate for 5min; then add 2g of iron acetylacetonate Fe(acac) 3 , heated to 180°C for 0.5h under magnetic stirring and nitrogen flow, continued heating to 275°C for 1h, cooled, washed, dried, and then sintered under nitrogen protection at 200°C to obtain magnetic biochar.

[0030] Weigh 2g of magnetic biochar and place it in an ethylene glycol solution (200mL) containing 2g of zinc chloride, configure a sulfur source (1g of thiourea, 4mL of n-butylamine, 36mL of ethylene glycol), and place the The sulfur source was injected slowly at 180°C and reacted for 3h. After cooling to room temperature, the adsorbent was separated with a magnet, washed, and vacuum-dried at 60° C. for 12 hours to obtain a magnetic bi...

Embodiment 2

[0034] A preparation method for an adsorbent of a magnetic biochar quantum dot composite for removing heavy metals, comprising the following steps:

[0035] Sieve the prepared biochar to 115 mesh; weigh 1g of biochar and place it in 100mL triethylene glycol solution, ultrasonicate for 5min; then add 2g of iron acetylacetonate Fe(acac) 3 , heated to 180°C for 0.5h under magnetic stirring and nitrogen flow, continued heating to 275°C for 1h, cooled, washed, dried, and then sintered under nitrogen protection at 200°C to obtain magnetic biochar.

[0036] Weigh 2g of magnetic biochar and place it in an ethylene glycol solution (200mL) containing 2g of ferrous chloride, configure a sulfur source (0.16g of sulfur element, 2mL of n-butylamine, 2g of PEG, 18mL of ethylene glycol), and pass nitrogen gas under magnetic stirring Slowly inject the sulfur source at 180°C and react for 2 hours. After cooling to room temperature, the adsorbent was separated with a magnet, washed, and vacuum-...

Embodiment 3

[0040] A preparation method for an adsorbent of a magnetic biochar quantum dot composite for removing heavy metals, comprising the following steps:

[0041] Sieve the prepared biochar to 115 mesh; weigh 1g of biochar and place it in 100mL triethylene glycol solution, ultrasonicate for 5min; then add 2g of iron acetylacetonate Fe(acac) 3 , heated to 180°C for 0.5h under magnetic stirring and nitrogen flow, continued to heat to 275°C for 1h, cooled, cleaned, dried, and then sintered under nitrogen protection at 200°C to obtain magnetic biochar;

[0042]Weigh 2g of magnetic biochar and place it in ethylene glycol solution (200mL) containing 2g of calcium nitrate, configure selenium source (0.76g of selenium powder, 1.25g of trisodium citrate, 25mL of ethylene glycol) Slowly inject the sulfur source at 180°C and react for 2 hours;

[0043] After cooling to room temperature, the adsorbent is separated with a magnet, cleaned, and vacuum-dried at 60° C. for 12 hours to obtain a magn...

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PUM

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Abstract

The invention relates to a magnetic biochar quantum dot composite adsorbent as well as a preparation method and a using method of the magnetic biochar quantum dot composite adsorbent. According to the preparation method, an ion exchange nano adsorbent with high adsorption capacity is prepared by means of carrying a sulfide or selenide nano adsorbent on magnetic biochar which serves as a carrier. In use, the ion exchange nano adsorbent is directly immersed in a solution rich in heavy metal ions; by the exchange between the harmless metal ions on the ion exchange nano adsorbent and the heavy metal ions, the heavy metal ions in a liquid phase are adsorbed onto the ion exchange nano adsorbent, so that the aim of removing heavy metal out of the liquid phase is achieved. Compared with the prior art, the ion exchange nano adsorbent has the advantages of high adsorption capacity, high adsorption rate and the like, and is applicable for removing heavy metal out of coal-fired flue gas and non-ferrous metal smelting flue gas, as well as wastewater from other heavy metal industries.

Description

technical field [0001] The invention belongs to the heavy metal removal technology in the technical field of environmental protection, and in particular relates to a magnetic biochar quantum dot composite adsorbent for removing heavy metals and a preparation and use method thereof. Background technique [0002] With the rapid development of the economy and the advancement of industrial technology, the adverse impact of industrial production on the environment has been increasing. The discharge of industrial waste will produce heavy metal pollution, mainly in water pollution, air pollution and soil pollution. Heavy metals are enriched and difficult to degrade in the environment, thus causing toxicity to animals, plants and humans. Therefore, the control of heavy metal pollution has become one of the urgent problems to be solved in environmental protection. [0003] The treatment of heavy metal pollution in soil includes engineering treatment, chemical treatment, and bioreme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J20/34C02F1/28C02F1/62
Inventor 李良严丽丽
Owner SHANGHAI JIAO TONG UNIV
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