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Preparation and application of porous basic lanthanum carbonate phosphate adsorbent

A technology of lanthanum carbonate phosphate and adsorbent, applied in the direction of adsorption of water/sewage treatment, alkali metal compounds, other chemical processes, etc., can solve the problems of unsatisfactory adsorption effect, low adsorption rate, poor selectivity, etc., and achieve good recycling properties, high adsorption capacity, and fast adsorption rate

Active Publication Date: 2021-06-25
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorbents developed in the prior art all have disadvantages such as unsatisfactory adsorption effect, poor selectivity, and low adsorption rate.

Method used

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  • Preparation and application of porous basic lanthanum carbonate phosphate adsorbent
  • Preparation and application of porous basic lanthanum carbonate phosphate adsorbent
  • Preparation and application of porous basic lanthanum carbonate phosphate adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 0.2mol of LaCl 3 ·7H 2 O, 1.2 mol of urea and 0.04 mol of sodium citrate were dissolved in 80 mL of deionized water, and the mixed solution was gently magnetically stirred at room temperature for 10 minutes, then sonicated for 20 minutes, and then transferred to a polytetrafluoroethylene liner, The hydrothermal reaction was carried out at 140°C in the reaction kettle. After the reaction was completed, it was cooled to room temperature, the above solution was filtered and washed with deionized water and ethanol, and then the filter cake was dried in an oven at 60°C to finally obtain a white solid product, namely is a porous adsorbent.

[0052] Wherein the hydrothermal reaction time is 4.5 hours.

[0053] It was characterized by electronic scanning, and the results are shown in the attached figure 1 As shown, it can be seen that the prepared LaCO 3 OH has a hierarchical porous structure.

[0054] The adsorbent prepared in this embodiment is characterized by X-ray dif...

Embodiment 2

[0059] The porous adsorbent was prepared by a process different from that of Example 1 only in the hydrothermal reaction time, wherein the hydrothermal reaction time was 3 hours.

Embodiment 3

[0061] The porous adsorbent was prepared by a process different from that of Example 1 only in the hydrothermal reaction time, wherein the hydrothermal reaction time was 6 hours.

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Abstract

The invention discloses preparation and application of a porous basic lanthanum carbonate phosphate adsorbent. The preparation method comprises the step of carrying out hydrothermal reaction on a mixed solution of lanthanum chloride, urea and sodium citrate at 120-180 DEG C to obtain the adsorbent. The adsorbent disclosed by the invention has relatively high adsorption rate, relatively high adsorption capacity and selectivity on phosphate, and also has good regeneration and cyclic utilization properties.

Description

technical field [0001] The present invention relates to the technical field of porous adsorbents. Background technique [0002] Phosphorus (P) is an essential nutrient element for plants, animals and humans, and nothing can replace the role of phosphorus in soil. However, as a non-renewable resource, its reserves are expected to gradually decrease and face depletion in the next fifty years, posing a huge challenge to global food production. But on the other hand, with orthophosphate ion (PO 4 3- ) in the form of phosphorus that enters natural water bodies with agricultural or industrial wastewater, once excessive, it will cause eutrophication of the water body, causing the uncontrollable growth of algae and bacteria in the water body, thereby robbing other aquatic organisms of oxygen, resulting in ecological destroy. [0003] At present, there are many technologies for phosphorus removal in wastewater. Among them, the adsorption method is generally considered to be a ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/0207B01J20/0277B01J20/28054C02F1/281C02F2101/105
Inventor 程福龙潘杰聂凡贵闫彬
Owner CHONGQING THREE GORGES UNIV
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