Preparation and application of graphene-based adsorbent synergistically adsorbing heavy metals and organic matters in water

A graphene-based, heavy metal technology, applied in alkali metal compounds, adsorbed water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve problems such as strong toxicity, threats to human health, and difficult to be removed, to achieve non-toxic Effects of secondary pollution, good stability and reusability, wide pH range

Inactive Publication Date: 2017-11-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since Cr exists in two forms of Cr(VI) and Cr(III) in the water environment, and Cr(VI) is more toxic than Cr(III), it is not easy to be removed in aqueous solution, and it has farther mobility, After being enriched by plants and then passed through the food chain, it will pose a very serious threat to human health

Method used

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  • Preparation and application of graphene-based adsorbent synergistically adsorbing heavy metals and organic matters in water
  • Preparation and application of graphene-based adsorbent synergistically adsorbing heavy metals and organic matters in water
  • Preparation and application of graphene-based adsorbent synergistically adsorbing heavy metals and organic matters in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Sonicate 200 mg graphene oxide in 100 ml ultrapure water with an ultrasonic cell disruptor for 10 h to obtain a uniformly dispersed graphene oxide solution for use;

[0032] (2) Distill the pyrrole monomer solution under reduced pressure, vacuumize the combined device, wrap the whole device with tin foil to prevent the re-oxidation of the distilled pyrrole, and distill it in a hot water bath at 100°C under nitrogen to obtain fresh pyrrole Single stand-by;

[0033] (3) Add an appropriate amount of FeCl3·6H2O into 10 ml of deionized medium and ultrasonically disperse until FeCl3·6H2O is completely dissolved for use;

[0034] (4) Take 25 ml of polytetrafluoroethylene lining, add 5 ml of graphene oxide dispersion, and then add 0.5 ml of fresh pyrrole monomer, sonicate the mixed solution for 10 min in an ultrasonic cell disruptor to mix the two solutions evenly ready for use;

[0035] (5) Put the lining into an ultrasonic cleaner, then pour the FeCl3·6H2O solution into...

Embodiment approach 2

[0040](1) Sonicate 200 mg graphene oxide in 100 ml ultrapure water with an ultrasonic cell disruptor for 10 h to obtain a uniformly dispersed graphene oxide solution for use;

[0041] (2) Distill the pyrrole monomer solution under reduced pressure, vacuumize the combined device, wrap the whole device with tin foil to prevent the re-oxidation of the distilled pyrrole, and distill it in a hot water bath at 100°C under nitrogen to obtain fresh pyrrole Single stand-by;

[0042] (3) Add an appropriate amount of FeCl3·6H2O into 10 ml of deionized medium and ultrasonically disperse until FeCl3·6H2O is completely dissolved for use;

[0043] (4) Take 25 ml of polytetrafluoroethylene lining, add 5 ml of graphene oxide dispersion, and then add 0.5 ml of fresh pyrrole monomer, sonicate the mixed solution for 10 min in an ultrasonic cell disruptor to mix the two solutions evenly ready for use;

[0044] (5) Put the lining into an ultrasonic cleaner, then pour the FeCl3·6H2O solution into ...

Embodiment approach 3

[0049] (1) Sonicate 200 mg graphene oxide in 100 ml ultrapure water with an ultrasonic cell disruptor for 10 h to obtain a uniformly dispersed graphene oxide solution for use;

[0050] (2) Distill the pyrrole monomer solution under reduced pressure, vacuumize the combined device, wrap the whole device with tin foil to prevent the re-oxidation of the distilled pyrrole, and distill it in a hot water bath at 100°C under nitrogen to obtain fresh pyrrole Single stand-by;

[0051] (3) Add an appropriate amount of FeCl3·6H2O into 10 ml of deionized medium and ultrasonically disperse until FeCl3·6H2O is completely dissolved for use;

[0052] (4) Take 25 ml of polytetrafluoroethylene lining, add 5 ml of graphene oxide dispersion, and then add 0.5 ml of fresh pyrrole monomer, sonicate the mixed solution for 10 min in an ultrasonic cell disruptor to mix the two solutions evenly ready for use;

[0053] (5) Put the lining into an ultrasonic cleaner, then pour the FeCl3·6H2O solution into...

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Abstract

The invention discloses a preparation method of graphene-based aerogel synergistically adsorbing heavy metals and organic matters in water and application of the aerogel in water treatment. A hydrothermal method is utilized for combining graphene with a pyrrole monomer, and polypyrrole / reduced graphene oxide aerogel (PGAs) is obtained. The aerogel has porosity of graphene and also has reducibility of polypyrrole, and the defect of excessive agglomeration of pyrrole can be well overcome by virtue of the porosity and dispersity of the graphene, so that a material can give full play to advantages thereof. Compared with an existing adsorber, the prepared adsorber has the characteristics that adsorption property is better, a wider pH range is adapted, stability is good, high-concentration, high-toxicity and persistent organic pollutant and heavy metal mixed wastewater can be synergistically adsorbed and no secondary pollution is produced.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene-based material that cooperatively adsorbs heavy metal ions and organic matter in wastewater, and belongs to the field of water treatment in environmental protection. Background technique [0002] With the continuous complexity of wastewater components, the treatment of mixed wastewater with heavy metals and organic matter has gradually attracted people's attention. Metal ions are highly toxic, widely distributed, and difficult to degrade. If they exist in the environment for a long time, they will be continuously enriched by low-level organisms and plants, and eventually enter the human body through the food chain, causing serious impacts such as teratogenic, carcinogenic, and mutagenic effects on the human body. Organic waste water has high chroma and peculiar smell. Some waste water emits a pungent stench, causing adverse effects on the surrounding environment. Commonly use...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/22C02F101/34
CPCB01J20/26B01J20/20B01J20/28047C02F1/288C02F2101/22C02F2101/34
Inventor张一梅张丹丹赵亚龙王利群
OwnerNORTH CHINA ELECTRIC POWER UNIV (BAODING)