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Magnetically modified hydrotalcite as well as preparation method and application thereof

A technology for modifying water and hydrotalcite, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc. Recycling and other issues, the preparation method is simple and easy to operate, the removal effect is obvious, and the adsorption time is short

Inactive Publication Date: 2015-06-17
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthetic hydrotalcite has poor adsorption capacity for heavy metal ions, and the saturated adsorption capacity is small, so it cannot be reused.
[0007] There is no report on modifying hydrotalcite with cationic iron

Method used

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  • Magnetically modified hydrotalcite as well as preparation method and application thereof
  • Magnetically modified hydrotalcite as well as preparation method and application thereof
  • Magnetically modified hydrotalcite as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: Magnetically modified hydrotalcite

[0040] 1) Calcination of hydrotalcite: place the hydrotalcite in a high-temperature environment of 500° C. for 4 hours and pass through a 100-mesh sieve to obtain the calcined hydrotalcite, which is put into a vacuum desiccator for later use.

[0041] 2) Fe 3 o 4 Preparation and modification of hydrotalcite: FeCl 2 4H 2 O and FeCl 3 ·6H 2 O is the raw material, prepare 0.44mol / L Fe with anaerobic distilled water 3+ , 0.22mol / L of Fe 2+ solution, pipette containing Fe 3+ , Fe 2+ Add 50mL of each solution, mix well, add 15mL of ammonia water dropwise, shake in a water bath at 80°C for 15min, add 1.5g of calcined hydrotalcite, keep at 70°C, and continue to shake for 90min.

[0042] 3) Drying for standby: vacuum sealing, aging at room temperature for 24 hours, placing in a constant temperature blower box at 50°C, drying for several hours, grinding, and passing through a 100-mesh sieve to obtain a magnetically modif...

Embodiment 2

[0043] Embodiment 2: magnetically modified hydrotalcite

[0044] 1) Calcination of hydrotalcite: place the hydrotalcite in a high-temperature environment of 300° C. for 4 hours and pass through a 100-mesh sieve to obtain the calcined hydrotalcite, which is put into a vacuum desiccator for later use.

[0045] 2) Fe 3 o 4 Preparation and modification of hydrotalcite: FeCl 2 4H 2 O and FeCl 3 ·6H 2 O is the raw material, prepare 0.44mol / L Fe with anaerobic distilled water 3+ , 0.22mol / L of Fe 2+ solution, pipette containing Fe 3+ , Fe 2+ Add 50 mL of each solution, mix well, add 15 mL of ammonia water dropwise, shake in a water bath at 80°C for 15 minutes, add 1.5 g of calcined hydrotalcite, keep at 80°C, and continue to shake for 90 minutes.

[0046] 3) Drying for standby: vacuum sealing, aging at room temperature for 24 hours, placing in a constant temperature blower box at 50°C, drying for several hours, grinding, and passing through a 100-mesh sieve to obtain a magne...

Embodiment 3

[0047] Embodiment 3: magnetically modified hydrotalcite

[0048] 1) Calcination of hydrotalcite: place the hydrotalcite in a high-temperature environment of 500° C. for 4 hours and pass through a 100-mesh sieve to obtain the calcined hydrotalcite, which is put into a vacuum desiccator for later use.

[0049] 2) Fe 3 o 4 Preparation and modification of hydrotalcite: FeCl 2 4H 2 O and FeCl 3 ·6H 2 O is the raw material, prepare 0.44mol / L Fe with anaerobic distilled water 3+ , 0.22mol / L of Fe 2+ solution, pipette containing Fe 3+ , Fe 2+ Add 50 mL of each solution, mix well, add 15 mL of ammonia water dropwise, shake in a water bath at 80°C for 15 minutes, add 1.5 g of calcined hydrotalcite, keep at 80°C, and continue to shake for 90 minutes.

[0050] 3) Drying: vacuum sealing, aging at room temperature for 24 hours, placing in a constant temperature blower box at 50°C, drying for several hours, grinding, passing through a 100-mesh sieve to obtain a magnetically modified...

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Abstract

The invention relates to magnetically modified hydrotalcite as well as a preparation method and an application thereof. A raw material of the magnetically modified hydrotalcite comprises the following components: hydrotalcite, Fe<2+>, Fe<3+> and ammonia water. The preparation method for the magnetically modified hydrotalcite is simple and easy to operate; as an excellent adsorbent, the magnetically modified hydrotalcite has a remarkable removal effect on heavy metal ions in wastewater.

Description

technical field [0001] The invention relates to a method for preparing an adsorption material, in particular to a magnetically modified hydrotalcite, a preparation method thereof and an application in heavy metal wastewater adsorption. Background technique [0002] Material adsorption is the use of solid substances to accumulate or concentrate adsorbates to achieve the purpose of separating or removing adsorbates. Adsorption treatment of heavy metals has developed into the mainstream direction in the past ten years. It has the characteristics of fast speed, large capacity, wide adaptability to conditions, easy operation and no secondary pollution, and has broad market prospects. [0003] Mineral materials are a large branch of many adsorbents. There are more than 3,000 minerals formed by more than 100 elements in nature. They are distributed in 32 point groups and 230 space groups. They have unique characteristics in chemical composition, structure type, and genetic occurren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01J20/28C02F1/28C02F1/62
Inventor 罗琳张琪魏建宏张嘉超彭湘奇易建龙王芳
Owner HUNAN AGRICULTURAL UNIV
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