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Magnetic/non-magnetic lanthanum carbonate sodium dephosphorization adsorbent and synthetic method thereof

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 simple experimental conditions, small size, and uniform distribution Effect

Active Publication Date: 2019-04-05
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Magnetic/non-magnetic lanthanum carbonate sodium dephosphorization adsorbent and synthetic method thereof
  • Magnetic/non-magnetic lanthanum carbonate sodium dephosphorization adsorbent and synthetic method thereof
  • Magnetic/non-magnetic lanthanum carbonate sodium dephosphorization adsorbent and synthetic method thereof

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

The invention discloses a magnetic / non-magnetic lanthanum carbonate sodium dephosphorization adsorbent and a synthetic method thereof. The synthetic method comprises the following steps: adding lanthanum salt and ferric salt to a solvent according to a certain proportion, after ultrasonic dissolution, adding a certain amount of a chelating agent, a dispersing agent and a precipitant, after acutelyand uniformly stirring, enabling mixed solution to be sealed in a stainless steel reaction kettle lined with tetrafluoroethylene; placing the reaction kettle in an oven for reacting, after ending a reaction, cooling to a room temperature; and after performing solid-liquid separation on a product, washing for several times by pure water and ethyl alcohol, after drying in vacuum, to obtain the adsorbent. The prepared magnetic / non-magnetic lanthanum carbonate sodium dephosphorization adsorbent is complete in crystal structure, smaller in size, and uniform in particle size distribution. In addition, experiment conditions are simple, operation is easy without a special equipment requirement, and repeatability is good.

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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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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