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

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

Example Embodiment

[0025] Example 1:

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

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

[0028] 3) The 50 mg of material obtained in the second step was sonicated in water for 1 hour, 3 mg of hydrazine hydrate was added to it, and the reaction was reduced in 800W microwave for 3 minutes. After suction filtration, washing, and drying, a composite adsorption of magnesium hydroxide / graphene was obtained. material.

[0029] 4) Put 30 mg of the prepared adsorption material into 50 mL wastewater with a pH of 4 and a phosphorus concentration of 50...

Example Embodiment

[0030] Example 2:

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

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

[0033] 3) The 50mg material obtained in the second step was sonicated in water for 2 hours, 4mg hydrazine was added to it, and the reaction was reduced in 800W microwave for 2.5 minutes. After suction filtration, washing and drying, the magnesium hydroxide / graphene composite adsorption material was obtained .

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

Example Embodiment

[0035] Example 3:

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

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

[0038] 3) The 50mg material obtained in the second step was sonicated in water for 1 hour, 4mg dimethylhydrazine was added to it, and the reaction was reduced in 800W microwave for 4 minutes. After suction filtration, washing and drying, a magnesium hydroxide / graphene composite was obtained. Adsorption material.

[0039] 4) Put 100mg of the prepared adsorption material into 300mL wastewater with a pH of 5 and a phosphorus concentration of 35mg / L, stir at room temperature for 1h, and then centrifuge and remove the supernatant. 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 Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap