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Self-assembled nano-film mno2 adsorbent and preparation method for efficiently adsorbing heavy metals

A technology for adsorbing heavy metals and nano-films, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the limited application prospects of the template method, cumbersome template removal steps, and easily damaged product structure and other problems, to achieve the effect of easy recovery, excellent removal ability and good adsorption effect

Inactive Publication Date: 2015-10-28
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shortcomings of long synthesis cycle, high cost, cumbersome template removal steps, inconvenient operation and easy to destroy the product structure, the application prospect of the template method is very limited.

Method used

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  • Self-assembled nano-film mno2 adsorbent and preparation method for efficiently adsorbing heavy metals
  • Self-assembled nano-film mno2 adsorbent and preparation method for efficiently adsorbing heavy metals
  • Self-assembled nano-film mno2 adsorbent and preparation method for efficiently adsorbing heavy metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take raw material reagent 0.28g KMnO 4 , 0.01g NH 4 h 2 PO 4 , 0.01g Na 2 SO 4 10H 2 O was respectively dissolved in an appropriate amount of deionized water. After fully dissolving, the solutions were mixed and a certain amount of deionized water was added to make the total volume of the final solution 90 ml. Stir for 15 minutes, transfer the solution to a 100ml stainless steel polytetrafluoroethylene reaction kettle, keep it in an oven at 140°C for 48 hours, turn off the power and let it cool down to room temperature naturally with the furnace, centrifuge the precipitate, and wash it with deionized water and ethanol several times. Vacuum drying at 70°C overnight to obtain nano-film self-assembled hierarchical layered MnO 2 Adsorbent material.

Embodiment 2

[0026] Take raw material reagent 0.28g KMnO 4 , 0.01g NH 4 h 2 PO 4 , 0.01g Na 2 SO 4 10H 2 O was respectively dissolved in an appropriate amount of deionized water. After fully dissolving, the solutions were mixed and a certain amount of deionized water was added to make the total volume of the final solution 90 ml. Stir for 15 minutes, transfer the solution to a 100ml stainless steel polytetrafluoroethylene reaction kettle, keep it in a 160°C oven for 48 hours, turn off the power and let it cool down to room temperature naturally with the furnace, centrifuge the precipitate, and wash it with deionized water and ethanol several times. Vacuum drying at 70°C overnight to obtain nano-film self-assembled hierarchical layered MnO 2 Adsorbent material.

Embodiment 3

[0028] Take raw material reagent 0.28g KMnO 4 , 0.01g NH 4 h 2 PO 4 , 0.01g Na 2 SO 4 10H 2 O was respectively dissolved in an appropriate amount of deionized water. After fully dissolving, the solutions were mixed and a certain amount of deionized water was added to make the total volume of the final solution 90 ml. Stir for 15 minutes, transfer the solution to a stainless steel polytetrafluoroethylene 100ml reaction kettle, keep it in a 180°C oven for 48 hours, turn off the power and let it cool down to room temperature naturally with the furnace, centrifuge the precipitate, and wash it with deionized water and ethanol several times. Vacuum drying at 70°C overnight to obtain nano-film self-assembled hierarchical layered MnO 2 Adsorbent material.

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Abstract

The invention relates to a self-assembled nano film MnO2 adsorption agent capable of high-efficiently adsorbing heavy metals and a preparation method of the adsorption agent, and belongs to the field of metal environmental protection. The adsorption agent has a nano film grading layered structure, in the size of 700 nanometers, which is formed by self-assembling sheets in the thickness of 2 to 3 nanometers. The preparation method comprises the following steps of dissolving KMnO4, NH4H2PO4 and Na2SO4.10H2O into deinoized water and mixing, reacting at a constant temperature in a reaction kettle, washing precipitates, drying the precipitates and the like. Raw materials of the absorption agent are cheap and easily available, the reaction condition is simple, the energy consumption is low, the adsorption agent has a good effect for removing heavy metal ions in an acid medium, and the application prospect is wide.

Description

technical field [0001] The invention belongs to waste water or sewage treatment, in particular to an adsorbent for separating heavy metal pollutants by precipitation and its preparation. Background technique [0002] Heavy metal pollution has attracted our attention because of its accumulation and long-term existence in the environment. Traditional methods for removing heavy metals from polluted water mainly include: ion exchange, co-precipitation, electrodialysis, filtration, electrochemical precipitation, reverse osmosis, chemical precipitation, adsorption, etc. However, most of these methods have disadvantages such as high cost, secondary pollution, and incomplete removal. In recent years, nano-sized manganese oxides have become the most potential for development because of their special crystal-type hierarchical pore structure, large specific surface area, strong oxidation and adsorption capacity, and stability in acidic media. It is one of the active compounds for the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/64
Inventor 郭洪郭园园王亚朋刘丽香杨项军陈伟伟李婷婷刘佳佳
Owner YUNNAN UNIV
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