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Phosphorus removal material aiming to low-concentration phosphorus, and preparation method and application of same

A low-concentration, sodium alginate technology, applied in chemical instruments and methods, other chemical processes, water treatment parameter control and other directions, to achieve the effect of convenient recycling, avoiding secondary pollution and low cost

Inactive Publication Date: 2019-01-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a phosphorus-removing material for low-concentration phosphorus and its preparation method and application, so as to solve the problems existing in the use of fly ash in the prior art

Method used

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  • Phosphorus removal material aiming to low-concentration phosphorus, and preparation method and application of same
  • Phosphorus removal material aiming to low-concentration phosphorus, and preparation method and application of same
  • Phosphorus removal material aiming to low-concentration phosphorus, and preparation method and application of same

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Effect test

Embodiment 1

[0025] A method for preparing a phosphorus-removing material for low-concentration phosphorus, comprising the steps of:

[0026] (1) According to the mass ratio of 1:3, weigh sodium alginate and fly ash respectively for later use, add sodium alginate to deionized water to prepare a 2wt.% sodium alginate solution, and stir vigorously at 70-90°C Make it completely dissolved and set aside;

[0027] (2) Add the weighed fly ash into the sodium alginate solution prepared in step (1), and continue to stir for 15 to 30 minutes to make it evenly mixed to obtain a slurry;

[0028] (3) Weigh LaCl respectively according to the mass ratio of lanthanum to calcium of 1:4 3 ·nH 2 O and anhydrous CaCl 2 Standby, add deionized water to prepare a 5wt.% mixed ion solution, and set aside;

[0029] (4) Add the slurry in the above step (2) dropwise into the mixed solution of step (3) at a constant speed with a syringe with a needle aperture of 1-3 mm, crosslink for 10 hours and form microspheres...

Embodiment 2

[0032] (1) According to the mass ratio of 1:6, weigh sodium alginate and fly ash respectively for later use, add sodium alginate into deionized water to prepare a 2wt.% sodium alginate solution, and stir vigorously at 70-90°C Make it completely dissolved and set aside;

[0033] (2) Add the weighed fly ash into the sodium alginate solution prepared in step (1), and continue to stir for 15 to 30 minutes to make it evenly mixed to obtain a slurry;

[0034] (3) Weigh LaCl respectively according to the mass ratio of lanthanum to calcium of 1:4 3 ·nH 2 O and anhydrous CaCl 2 Standby, add deionized water to prepare a 5wt.% mixed ion solution, and set aside;

[0035] (4) Add the slurry in the above step (2) dropwise into the mixed solution of step (3) at a constant speed with a syringe with a needle aperture of 1-3 mm, crosslink for 10 hours and form microspheres;

[0036] (5) The microspheres were repeatedly washed with ultrapure water for 3 to 5 times to remove uncrosslinked met...

Embodiment 3

[0038] (1) According to the mass ratio of 1:3, weigh sodium alginate and fly ash respectively for later use, add sodium alginate to deionized water to prepare a 2wt.% sodium alginate solution, and stir vigorously at 70-90°C Make it completely dissolved and set aside;

[0039] (2) Add the weighed fly ash into the sodium alginate solution prepared in step (1), and continue to stir for 15 to 30 minutes to make it evenly mixed to obtain a slurry;

[0040] (3) Weigh LaCl respectively according to the mass ratio of lanthanum to calcium of 3:7 3 ·nH 2 O and anhydrous CaCl 2 Standby, add deionized water to prepare a 5wt.% mixed ion solution, and set aside;

[0041] (4) Add the slurry in the above step (2) dropwise into the mixed solution of step (3) at a constant speed with a syringe with a needle aperture of 1-3 mm, crosslink for 10 hours and form microspheres;

[0042] (5) The microspheres were repeatedly washed with ultrapure water for 3 to 5 times to remove uncrosslinked metal...

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Abstract

The invention relates to the technical field of polluted water body remediation, and particularly relates to removal of low-concentration phosphate, and especially provides a phosphorus removal material aiming to low-concentration phosphorus, and a preparation method and an application of same. The material is microspheres formed from sodium alginate and fly ash coated with the sodium alginate ina crosslinking manner. The preparation method includes: dissolving the sodium alginate in deionized water and adding fly ash to prepare the slurry; dropwise adding a mixed solution of LaCl3.nH2O and anhydrous CaCl2 to the slurry by using an injector with needle pore size being 2-3 mm for crosslinking to form the spheres; washing the spheres for several times with ultrapure water, and drying the product. The sodium alginate microspheres have strong adsorption effect on low-concentration phosphate pollution. The preparation method of the phosphorus removal material can solve the problem of recycling of the wastes well, is low in cost, and is simple in operation. The material has an excellent promotion and application prospect as an emergency treatment method for phosphorus exceeding standardof tail water of sewage plant and rivers.

Description

technical field [0001] The invention relates to the technical field of repairing water body pollution, in particular to the removal of low-concentration phosphate, in particular to a phosphorus-removing material for low-concentration phosphorus and its preparation method and application. Background technique [0002] Phosphorus is one of the essential trace elements in the process of plant growth. However, when the phosphorus content in the water body is higher than 20mg / m 3 It will cause eutrophication of water body, lead to deterioration of water quality, and endanger aquatic organisms and human health. The 2017 "China Environmental Status Bulletin" pointed out that among the 109 lakes (reservoirs) whose nutritional status was monitored, eutrophic lakes (reservoirs) accounted for 30%. It is imminent to effectively control the phosphorus content in the water body and prevent the eutrophication of the water body. [0003] At present, for the environmental problems of phos...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/103B01J20/28021B01J20/3042B01J20/3085B01J2220/4887C02F1/281C02F2101/105C02F2209/18
Inventor 谢燕华朱雪千王波吴桐杨景龙陈浪任璐璐
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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