Lanthanum-based loaded magnetic nano-adsorption phosphorus removal material and its synthesis method

A synthesis method, magnetic nanotechnology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as odor generation, dissolved oxygen consumption, and biodiversity reduction

Active Publication Date: 2021-05-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The eutrophication of water bodies has always been one of the biggest environmental problems facing the world. This problem will lead to the following consequences: 1. Depletion of dissolved oxygen in water bodies, leading to deterioration of water quality; 2. Reduction of biological diversity
Since the cyanobacteria formed an absolute dominant population, it exacerbated the deterioration of the water environment, which greatly affected the survival and reproduction of other algae, plankton and aquatic animals; 3. Odors were produced; 4. When water blooms occurred in water plants , a large amount of algae will cause the treatment capacity of the treatment plant to decline, and the water body will have a musty smell, and even algae toxins will directly affect the life safety of residents, thereby affecting the safety of drinking water; 5. Destroying the water body landscape

Method used

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  • Lanthanum-based loaded magnetic nano-adsorption phosphorus removal material and its synthesis method
  • Lanthanum-based loaded magnetic nano-adsorption phosphorus removal material and its synthesis method
  • Lanthanum-based loaded magnetic nano-adsorption phosphorus removal material and its synthesis method

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preparation example Construction

[0035] Preparation of Fe3O4

[0036] Concretely include the following steps: first, put the deionized water in a vacuum device for 0.5h to remove the oxygen in the water; In the three-necked flask, the temperature was raised to 60°C under the protection of nitrogen; 52mL of 4mol / L NaOH solution was added dropwise into the three-necked flask within 30min, and mechanically stirred at 400rpm at the same time, so that the pH of the solution rose to 9-10; 500rpm mechanically stirred for 1h, The final product is magnetically separated, washed twice with ethanol and water respectively, freeze-dried by a freeze dryer, and stored in a vacuum oven for later use. The grain size distribution of the iron ferric oxide prepared by the method is 5-50nm.

[0037] 1. Preparation of materials for adsorption and phosphorus removal

Embodiment 1

[0039] Weigh 5mmol ferric oxide and add it into 80ml pure water for 15min; then add 6.0g sodium citrate and stir mechanically for 30min; then add 20mmol lanthanum chloride and stir mechanically for 30min, 1000r / min; then seal it in the polytetrafluoroethylene-lined Stainless steel autoclave. Heated at 180°C for 12h and cooled to room temperature. After magnetic separation, the product is washed several times with pure water and ethanol, and vacuum freeze-dried to obtain the magnetic lanthanum-based phosphorus removal adsorption material.

Embodiment 2

[0041] Weigh 5mmol of ferric oxide and add it to 80ml of ethanol and sonicate for 15min; then add 6.0g of sodium ethylenediaminetetraacetate and stir mechanically for 30min; then add 5mmol of lanthanum chloride and stir mechanically for 60min at 500r / min; Lined stainless steel autoclave. Heated at 200°C for 10h and cooled to room temperature. After filtration and separation, the product is washed several times with pure water and ethanol, and vacuum freeze-dried to obtain the magnetic lanthanum-based phosphorus removal adsorption material.

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Abstract

The invention discloses a lanthanum-based loaded magnetic nano-adsorption dephosphorization material and a synthesis method thereof. The preparation method comprises the following steps: Step 1: sequentially adding ferric oxide, chelating agent and lanthanum salt into deionized water and stirring and mixing in sequence Uniform, wherein: the molar ratio of ferric oxide and lanthanum salt is 1:6-5:1; Step 2: put the mixed solution into a polytetrafluoroethylene-lined stainless steel reactor, at a temperature of 120-200°C React for 8-12 hours to obtain the prepared adsorption phosphorus removal material. The magnetic lanthanum-based phosphorus-removing adsorbent prepared by the invention has excellent phosphorus-removal effect, wide pH application range, strong phosphate-specific adsorption capacity, and is easy to recycle and can be recycled.

Description

technical field [0001] The invention belongs to the field of inorganic nano / micro materials, and specifically relates to a lanthanum-based loaded magnetic nano adsorption and dephosphorization material and a synthesis method thereof. Background technique [0002] The eutrophication of water bodies has always been one of the biggest environmental problems facing the world. This problem will lead to the following consequences: 1. Depletion of dissolved oxygen in water bodies, leading to deterioration of water quality; 2. Reduction of biological diversity. Since the cyanobacteria formed an absolute dominant population, it exacerbated the deterioration of the water environment, which greatly affected the survival and reproduction of other algae, plankton and aquatic animals; 3. Odors were produced; 4. When water blooms occurred in the water source of the waterworks , A large number of algae will cause the treatment capacity of the treatment plant to decline, and the water body w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28
CPCB01J20/0207B01J20/0229B01J20/28007B01J20/28009C02F1/281C02F2101/105
Inventor 郝昊天石宝友黄旭徐硕梁峰
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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