Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Magnesium hydroxide/graphene compound adsorbing material for phosphorus-containing wastewater treatment as well as preparation method and application thereof

A graphene composite, magnesium hydroxide technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problem of low phosphorus removal rate by biological method, difficult selection of chemical agents, and complex treatment system. and other problems, to achieve the effect of being suitable for large-scale production, wide application and simple process

Inactive Publication Date: 2013-02-13
WUHAN INSTITUTE OF TECHNOLOGY
View PDF2 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal rate of biological phosphorus removal is not high, and the treatment system is more complicated
Phosphorus removal by chemical methods will produce a large amount of sludge, and the choice of chemical agents is difficult, which will easily cause secondary pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Using natural graphite, prepare graphene oxide according to the method reported in the literature (Composites Science and Technology, 2009, 69, 1231);

[0027] 2) Add the magnesium chloride solution containing 1mmol dropwise to the solution containing 50mg graphene oxide, stir for 2 hours, then add sodium hydroxide solution with the same molar amount as magnesium chloride, continue stirring for 1 hour, then filter, wash, After drying, magnesium hydroxide / graphene oxide composite material is obtained;

[0028] 3) Ultrasonicate 50mg of the material obtained in the second step in water for 1 hour, add 3mg of hydrazine hydrate to it, reduce it in 800W microwave for 3 minutes, filter, wash and dry to obtain magnesium hydroxide / graphene composite adsorption Material.

[0029] 4) Put 30 mg of the prepared adsorption material into 50 mL of wastewater with a pH value of 4 and a phosphorus concentration of 50 mg / L, stir at room temperature for 1 hour, centrifuge and remove th...

Embodiment 2

[0031] 1) Same as Step 1 of Example 1;

[0032] 2) Add the magnesium chloride solution containing 3mmol dropwise to the solution containing 50mg graphene oxide, stir for 2 hours, then add sodium hydroxide solution with the same molar amount as magnesium chloride, continue stirring for 2 hours, then suction filter, wash, After drying, magnesium hydroxide / graphene oxide composite material is obtained;

[0033] 3) Ultrasonicate 50mg of the material obtained in the second step in water for 2 hours, add 4mg of hydrazine to it, perform a reduction reaction in 800W microwave for 2.5 minutes, filter, wash and dry to obtain magnesium hydroxide / graphene composite adsorption material .

[0034] 4) Put 50 mg of the prepared adsorption material into 200 mL of wastewater with a pH value of 6 and a phosphorus concentration of 40 mg / L, stir at room temperature for 1 hour, centrifuge and remove the supernatant at night. After testing, the removal rate was 91%.

Embodiment 3

[0036] 1) Same as Step 1 of Example 1;

[0037] 2) Add dropwise the magnesium chloride solution containing 2mmol into the solution containing 50mg graphene oxide, stir for 2 hours, then add ammonia solution with the same molar amount as magnesium chloride, continue stirring for 1 hour, then filter, wash and dry , to obtain magnesium hydroxide / graphene oxide composite material;

[0038] 3) Ultrasonicate 50mg of the material obtained in the second step in water for 1 hour, add 4mg of dimethylhydrazine to it, reduce it in 800W microwave for 4 minutes, suction filter, wash and dry to obtain magnesium hydroxide / graphene composite Adsorbent material.

[0039] 4) Put 100 mg of the prepared adsorption material into 300 mL of wastewater with a pH value of 5 and a phosphorus concentration of 35 mg / L, stir at room temperature for 1 hour, centrifuge and remove the supernatant at night. After testing, the removal rate was 94%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relate to a magnesium hydroxide / graphene compound adsorbing material for phosphorus-containing wastewater treatment as well as a preparation method and an application thereof. The preparation method comprises the following steps of: 1) preparing graphene oxide through using a chemical oxidization method by utilizing natural graphite; 2) dripping a magnesium chloride solution into a graphene oxide solution; agitating for 1-3 hours; then adding an alkaline solution having the same mol amount as magnesium chloride; continually agitating for 1-3 hours; filtering, washing and drying to obtain a magnesium hydroxide / graphene oxide compound adsorbing material; and 3) carrying out ultrasonic treatment on the magnesium hydroxide / graphene compound adsorbing material obtained by the step 2 in water for 1-2 hours; adding a reducing agent and carrying out reduction reaction in microwaves of being 800W for 2-5 minutes; and filtering, washing and drying to obtain the magnesium hydroxide / graphene compound adsorbing material. The magnesium hydroxide / graphene compound adsorbing material has the advantages that the adsorption capability is good; the application range is wide; and raw materials for preparing the adsorbing material are easy to obtain and a microwave reduction method is simple.

Description

technical field [0001] The invention relates to a magnesium hydroxide / graphene composite adsorption material for treating phosphorus-containing wastewater, a preparation method and application thereof, and belongs to the field of adsorption materials and wastewater treatment. Background technique [0002] The discharge of a large amount of domestic sewage and industrial wastewater containing phosphorus, nitrogen and other elements causes the rapid reproduction of plankton in the water body, reduces the oxygen content of the water body, and seriously pollutes the water environment, which has brought great harm to industry, agriculture, tourism, etc. harm. In today's society, people are more and more interested in environmental protection. Research and development of efficient wastewater phosphorus removal materials and technologies to remove phosphorus in different water qualities and avoid eutrophication of water bodies is one of the hot issues in controlling water pollution...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 黄浩李亮刘玉兰郑华明喻湘华
Owner WUHAN INSTITUTE OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com