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Lanthanum-modified graphene oxide, phosphate ion grid and methods for preparing lanthanum-modified graphene oxide and phosphate ion grid

A technology of oxidized rock and phosphate, which is applied in the field of phosphate ion grid and its preparation, new materials for phosphorus-locking agents, and lanthanum-modified graphene oxide. Replacement difficulties and other problems, to achieve the effect of simple preparation method, strong phosphorus adsorption capacity, and simple operation

Inactive Publication Date: 2017-12-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, this kind of phosphorus-locking agent still has defects in controlling endogenous pollution, such as: the amount of sediment will continue to accumulate, and the duration of the control effect is limited, and it is difficult to replace the phosphorus-locking agent when the phosphorus-locking agent reaches adsorption equilibrium
These shortcomings hinder the better application of phosphorus locking agent

Method used

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  • Lanthanum-modified graphene oxide, phosphate ion grid and methods for preparing lanthanum-modified graphene oxide and phosphate ion grid
  • Lanthanum-modified graphene oxide, phosphate ion grid and methods for preparing lanthanum-modified graphene oxide and phosphate ion grid
  • Lanthanum-modified graphene oxide, phosphate ion grid and methods for preparing lanthanum-modified graphene oxide and phosphate ion grid

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Experimental program
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Effect test

Embodiment 1

[0052] The preparation process of the phosphate ion grid of the present embodiment is as follows:

[0053] First, 22ml of solution 1, 22ml of solution 2 and 1ml of polyethylene glycol are fully stirred and mixed evenly; then 0.1g of lanthanum-modified graphene oxide and 0.6g of lanthanum-modified chitosan are slowly and uniformly added to the mixture within 5-10min And fully dispersed, the stirring rate is 150-220rpm; then add 22ml solution 3 to the mixed solution, reduce the stirring rate to 50-70rpm and continue to stir for 2 hours; freeze-dry the evenly stirred mixed solution to obtain the prepared PAB, The lanthanum-modified graphene oxide in this embodiment is prepared from graphene oxide and lanthanum chloride at a mass ratio of 1:0.3.

[0054] The phosphate ion grid (1 g) obtained in this example was used for locking and removing phosphorus in phosphorus-containing wastewater (phosphorus concentration: 50 mg / L, volume: 50 mL). After 8 hours, the amount of locked phosph...

Embodiment 2

[0056] First, 25ml of solution 1, 25ml of solution 2 and 1ml of polyethylene glycol are fully stirred and mixed evenly; then 0.3g of lanthanum-modified graphene oxide and 1.5g of lanthanum-modified chitosan are slowly and uniformly added to the mixture within 5-10min And fully dispersed, the stirring rate is 150-220rpm; then add 25ml solution 3 to the mixed solution, reduce the stirring rate to 50-70rpm and continue to stir for 2 hours; freeze-dry the mixed solution to obtain the prepared PAB, The lanthanum-modified graphene oxide in this embodiment is prepared from graphene oxide and lanthanum chloride at a mass ratio of 1:0.4.

[0057] The phosphate ion grid (1 g) obtained in this example was used for locking and removing phosphorus in phosphorus-containing wastewater (phosphorus concentration: 50 mg / L, volume: 50 mL). After 8 hours, the amount of locked phosphorus was 10.42 mg / g.

Embodiment 3

[0059] First, 27ml of solution 1, 27ml of solution 2 and 1ml of polyethylene glycol are fully stirred and mixed evenly; then 0.5g of lanthanum-modified graphene oxide and 2.0g of lanthanum-modified chitosan are slowly and uniformly added to the mixture within 5-10min And fully dispersed, the stirring rate is 150-220rpm; then add 27ml of solution 3 to the mixed solution, reduce the stirring rate to 50-70rpm and continue to stir for 2 hours; freeze-dry the evenly stirred mixed solution to obtain the prepared PAB, The lanthanum-modified graphene oxide in this embodiment is prepared from graphene oxide and lanthanum chloride at a mass ratio of 1:0.5.

[0060] The phosphate ion grid (1 g) obtained in this example was used for locking and removing phosphorus in phosphorus-containing wastewater (phosphorus concentration: 50 mg / L, volume: 50 mL). After 8 hours, the amount of phosphorus locked was 15.41mg / g.

[0061] The phosphate ion grid of the present invention uses lanthanum-modif...

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Abstract

The invention discloses lanthanum-modified graphene oxide, a phosphate ion grid and methods for preparing the lanthanum-modified graphene oxide and the phosphate ion grid. The phosphate ion grid is applied to controlling internal pollution of lakes. The lanthanum-modified graphene oxide (La-GO) and La-chitosan (La-chitosan) are used as effective phosphorus locking substances for the phosphate ion grid, and chitosan and PVA (polyvinyl alcohol) sponges are used as main support framework materials for the phosphate ion grid; sodium alginate and polyethylene glycol are used as cross-linking materials for preparing the phosphate ion grid which is a spongy water-permeable material. The lanthanum-modified graphene oxide (La-GO) is prepared by the aid of synchronous coagulation processes. The lanthanum-modified graphene oxide, the phosphate ion grid and the methods have the advantages that the phosphate ion grid is the white spongy material and is excellent in water permeability, and the main phosphorus locking substances including the lanthanum-modified graphene oxide (La-GO) and the La-chitosan (La-chitosan) can be effectively fused in the framework materials; the phosphate ion grid is excellent in blocking capacity in lake bottom sediment phosphorus releasing procedures during practical application and is high in structural stability and easy to replace.

Description

technical field [0001] The present invention relates to the field of water body pollution and its prevention and control, in particular to a new material of phosphorus-locking agent, which is an application material of an in-situ treatment method, and is applied to block endogenous pollution of eutrophic water bodies, specifically a lanthanum-modified Permanent graphene oxide, phosphate ion grid and preparation method. Background technique [0002] According to the monitoring results of the 15th issue of the National Weekly Report on Water Quality Monitoring of Key Sections in Major River Basins, among the 148 water quality monitoring sections of major natural water bodies in the country, water bodies of Class III and below accounted for about 41.1% of the total monitored water bodies. Lakes and watersheds with poor water quality are mainly caused by changes in permanganate index, ammonia nitrogen and dissolved oxygen in the water body. Among them, the Baohe River and Kuihe...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/24B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/24C02F1/283C02F1/286C02F2101/105
Inventor 杨生炯陈晓恬王晓昌金鹏康张琼华王文东
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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