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A kind of magnetic/non-magnetic lanthanum sodium carbonate dephosphorization adsorbent and its synthesis method

A technology of sodium lanthanum carbonate and phosphorus adsorbent, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems that have not been reported, and achieve no special equipment requirements, small size, and distribution uniform effect

Active Publication Date: 2021-10-26
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the high-performance phosphorus adsorbent lanthanum carbonate, especially the magnetic lanthanum carbonate adsorbent with high recovery potential has not been reported yet.

Method used

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  • A kind of magnetic/non-magnetic lanthanum sodium carbonate dephosphorization adsorbent and its synthesis method
  • A kind of magnetic/non-magnetic lanthanum sodium carbonate dephosphorization adsorbent and its synthesis method
  • A kind of magnetic/non-magnetic lanthanum sodium carbonate dephosphorization adsorbent and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 5mmol ferric chloride and 0.5mmol lanthanum chloride and dissolve in 80mL ethylene glycol to form a clear solution. 7.2 g of sodium acetate, 2 g of polyethylene glycol (2000), and 1 g of urea were added to the solution, vigorously mechanically stirred for 30 minutes, and then sealed in a Teflon-lined stainless steel autoclave. Heated at 200°C for 12 hours and cooled to room temperature. After the magnetic separation, the product is washed several times with pure water and ethanol, and vacuum freeze-dried to obtain the magnetic lanthanum sodium carbonate phosphorus-removing adsorbent.

Embodiment 2

[0033] Weigh 5mmol ferric chloride and 5mmol lanthanum chloride and dissolve in 80mL ethylene glycol to form a clear solution. 7.2 g of sodium citrate, 2 g of polyethylene glycol (500) and 1 g of urea were added to the solution, vigorously magnetically stirred for 30 minutes, and then sealed in a Teflon-lined stainless steel autoclave. Heated at 180°C for 12 hours and cooled to room temperature. After separation by gravity sedimentation, the product was washed several times with pure water and ethanol, and then dried in vacuum at 80°C to obtain the magnetic lanthanum carbonate phosphorus-removing adsorbent.

Embodiment 3

[0035] Weigh 5mmol ferric nitrate and 20mmol lanthanum nitrate and dissolve in 80mL ethylene glycol to form a clear solution. 7.2 g of ethylenediaminetetraacetic acid, 2 g of polyethylene glycol (10000) and 1 g of urea were added to the solution, vigorously magnetically stirred for 30 minutes, and then sealed in a Teflon-lined stainless steel autoclave. Heated at 200°C for 12 hours and cooled to room temperature. After filtration and separation, the product was washed several times with pure water and ethanol, and then vacuum-dried at 60°C to obtain the magnetic lanthanum sodium carbonate phosphorus-removing adsorbent.

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Abstract

A magnetic / nonmagnetic lanthanum sodium carbonate dephosphorization adsorbent and a synthesis method thereof, comprising the following steps: adding a lanthanum salt and an iron salt into a solvent in a certain proportion, and after ultrasonically dissolving, adding a certain amount of a chelating agent and a dispersing agent and precipitant, after stirring vigorously, the mixed solution was sealed in a tetrafluoroethylene-lined stainless steel reactor. The reaction kettle was placed in an oven for reaction, and cooled to room temperature after the reaction was completed. The product is obtained after solid-liquid separation, washed with pure water and ethanol several times, and dried in vacuum. The magnetic / nonmagnetic lanthanum carbonate dephosphorization adsorbent prepared by the invention has complete crystal structure, small size and uniform particle size distribution. Moreover, the experimental conditions are simple, easy to operate, no special equipment requirements, and good reproducibility.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer / micrometer materials, and in particular relates to a method for synthesizing a magnetic / nonmagnetic sodium lanthanum carbonate environmental phosphorus removal adsorbent by a solvothermal one-step method. Background technique [0002] The eutrophication of the water body will lead to the abnormal proliferation of algae and other plankton in the water body, the decrease of the dissolved oxygen concentration, the deterioration of the water quality, and the mass death of fish and other organisms. On the one hand, it will reduce the ornamental value of the water body. On the other hand, it will seriously damage the ecological balance of the water body and the biodiversity of the water body, leading to the deterioration of the overall ecosystem. Among them, excessive nitrogen and phosphorus nutrients are the main causes of water eutrophication. In recent years, researchers have found that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30C02F1/28C02F101/10
CPCB01J20/0277C02F1/281C02F2101/105
Inventor 王毅力郝昊天
Owner BEIJING FORESTRY UNIVERSITY
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