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Composite of lanthanum molybdate and ferromagnetic material and its preparation and application of adsorption and dephosphorization

A ferromagnetic material, lanthanum molybdate technology, used in alkali metal compounds, adsorbed water/sewage treatment, water pollutants, etc., can solve the problems of difficult solid-liquid separation, poor selectivity, inability to remove organic matter in sewage at the same time, and achieve dispersion. Good sex and risk-reducing effects

Active Publication Date: 2020-05-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention solves the problem that the phosphorus removal adsorbent in the prior art has small adsorption capacity, difficulty in solid-liquid separation, poor selectivity, inability to realize recycling, and inability to remove organic matter in sewage at the same time

Method used

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  • Composite of lanthanum molybdate and ferromagnetic material and its preparation and application of adsorption and dephosphorization
  • Composite of lanthanum molybdate and ferromagnetic material and its preparation and application of adsorption and dephosphorization
  • Composite of lanthanum molybdate and ferromagnetic material and its preparation and application of adsorption and dephosphorization

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The preparation method of the composite of lanthanum molybdate and ferromagnetic material comprises the following steps:

[0042] (1) Preparation of ferric oxide: 3.0g FeCl 3 ·6H 2 O and 0.72g of trisodium citrate were dissolved in 100ml of ethylene glycol, and then 4.8g of sodium acetate was dissolved in the above solution. After stirring for 0.5h under mechanical stirring conditions, they were put into a polytetrafluoroethylene reactor. React at -220°C for 8h-10h; after the reactor is cooled to room temperature, wash the black product with deionized water and ethanol for several times, and then vacuum-dry it. The lens diagram under the dispersion condition of the prepared ferroferric oxide is as follows figure 1 shown by figure 1 It can be seen that the ferroferric oxide crystals are dispersed with each other without agglomeration, which indicates that ferric oxide has good dispersion performance.

[0043] (2) 0.45g prepared Fe 3 o 4 After ultrasonic dispersion ...

Embodiment 2

[0050] Repeat Example 1 with the same steps as described, the difference is that the ferromagnetic material is γ-Fe 2 o 3 , the reaction time in the polytetrafluoroethylene reactor is 10h, the pH is adjusted to 8.0, and the reaction temperature is 200°C.

Embodiment 3

[0052] Repeat Example 1 with the same steps described above, the difference is that the ferromagnetic material is γ-Fe2O3, the reaction time in the polytetrafluoroethylene reactor is 12h, the pH is adjusted to 8.0, and the reaction temperature is 300°C.

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Abstract

The invention discloses a compound of lanthanum molybdate and ferromagnetic materials and application of preparation and adsorption phosphorus removal, belonging to the technical field of phosphorus removal from sewage and wastewater. The preparation method of the composite comprises the following steps of: dispersing ferromagnetic materials in water, adding lanthanum salt, fully mixing, adding ammonium molybdate, sodium molybdate or potassium molybdate, adjusting the pH to 8-10, and performing coprecipitation reaction to obtain lanthanum molybdate. The reaction system is placed in a reactionkettle and reacts under the condition of 180 DEG C or more to obtain a composite of lanthanum molybdate and ferromagnetic materials. According to the composite disclosed by the invention, the selective adsorption function of lanthanum molybdate on phosphate radicals is utilized, and the superparamagnetism of ferromagnetic ore is utilized at the same time, so that the adsorbent can be separated andregenerated under the condition of an external magnetic field after phosphorus is adsorbed and removed in sewage, and the effect of recycling the adsorbent is realized.

Description

technical field [0001] The invention belongs to the technical field of phosphorus removal from sewage and wastewater, in particular to a compound of lanthanum molybdate and a ferromagnetic material and its preparation and application of adsorption and phosphorus removal. Background technique [0002] Phosphorus is one of the main factors causing water eutrophication, and phosphorus is a non-renewable resource. Therefore, effective removal and recovery of phosphorus is an urgent problem to be solved. About 30-50% of the natural water bodies in the world are facing the problem of eutrophication, and 30.3% of the lakes and reservoirs in the country have the problem of eutrophication. The traditional sewage phosphorus removal methods include: the biological method realizes the removal of phosphorus in the system by discharging excess sludge. However, the amount of biological phosphorus removal sludge is high, and it is easy to cause secondary pollution. At the same time, the exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/06B01J20/30C02F1/28C02F1/48C02F101/10
CPCB01J20/0262B01J20/06B01J20/28009B01J2220/42C02F1/281C02F1/488C02F2101/105
Inventor 冯晓楠蒋晓清谢鹏超周爱姣罗凡陶涛高润年
Owner HUAZHONG UNIV OF SCI & TECH
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