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A kind of water body phosphorus adsorption material and its preparation and application method

The technology of adsorption material and application method is applied in the field of adsorption of phosphate pollutants in water bodies, which can solve the problems of inability to effectively control phosphate pollution, poor adsorption performance, and ecological harm, and achieve excellent adsorption effect, large adsorption capacity, and control of eutrophication. the effect of

Active Publication Date: 2022-01-28
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new water body phosphorus adsorption material and its preparation and application method, so as to solve the problems of high price, poor adsorption performance, ecological hazards, and inability to effectively control surface freshwater lakes in current water body phosphorus adsorption materials. Technical Issues of Low Concentration Phosphate Contamination in Reservoirs

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  • A kind of water body phosphorus adsorption material and its preparation and application method
  • A kind of water body phosphorus adsorption material and its preparation and application method
  • A kind of water body phosphorus adsorption material and its preparation and application method

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Embodiment 1

[0035] Embodiment 1: Water body phosphorus adsorption new material and preparation method thereof

[0036] One, according to the preparation method of a kind of water body phosphorus adsorption new material of the present invention comprises the following steps:

[0037] 1. Purification treatment

[0038] The natural calcium-based montmorillonite was pre-purified by gravity elutriation and centrifugation to obtain calcium-based montmorillonite with high purity. The specific method is: add dry, crushed, 325 mesh calcium-based montmorillonite into deionized water to make it fully dispersed, let it soak for 24 hours, discard the supernatant, then add deionized water, stir to make it even Mix and let stand for 30 minutes, centrifuge the upper layer solution at a speed of 600-1000 r / min for 5 minutes, and discard the precipitate. Continue to centrifuge the upper suspension at 3500r / min for 15min, discard the supernatant, and dry the obtained precipitate at 70°C to obtain montmori...

Embodiment 2

[0074] Embodiment 2: The application method of the new material for phosphorus adsorption in water body

[0075] Put the adsorbent material in Example 1 into the water body containing phosphorus pollutants. In the application of adsorption materials for phosphorus removal, dosage, suitable water pH range and cost are usually the three main factors considered for adsorption materials to remove phosphate. For this reason, the present invention also studies the influence of the dosage of the adsorbent material and the pH of the water body on the adsorption of phosphate by the zirconium-modified montmorillonite, and clarifies the application conditions of the prepared zirconium-modified adsorbent material. In addition, the present invention also carries out a risk assessment on the potential impact on the ecological environment after the adsorption material is applied.

[0076] 1. Dosing amount

[0077] The dosage (adsorbent material / phosphorus content ratio in water) ranges fro...

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Abstract

The invention discloses a new material for phosphorus adsorption in water body and its preparation and application method. The new adsorption material is Zr-CaM1 and / or Zr-CaM2, products of zirconium-modified calcium-based montmorillonite. The preparation method comprises the following steps: Steps: (1) Mixing and dispersing: Calcium-based montmorillonite and zirconium oxide plus deionized water are mixed and dissolved, shaken and dispersed to obtain a mixed solution; (2) pH value adjustment: adjust the pH value of the mixed solution to 9-11 , and then react with constant temperature oscillation to obtain a solid-liquid mixture; (3) solid-liquid separation: centrifuge the solid-liquid mixture to obtain a precipitate that is repeatedly washed with deionized water, and then dried to obtain a zirconium-modified calcium-based montmorillonite The product Zr-CaM1 and / or Zr-CaM2. The present invention adopts impregnation-exchange-co-precipitation method to prepare a novel zirconium-modified montmorillonite adsorption material, which has simple process, easy operation, large phosphorus adsorption capacity of the adsorption material, wide applicable pH range, low operation cost, and ecological environment protection, etc. advantage.

Description

technical field [0001] The invention relates to a new water body phosphorus adsorption material and its preparation and application method, belonging to the technical field of water body phosphate pollutant adsorption. Background technique [0002] With the rapid development of social economy and the acceleration of urbanization, the eutrophication of surface freshwater has become a major global water environment pollution problem. As the key limiting factor of water eutrophication, the excessive input of phosphorus causes the transparency of lakes, reservoirs and other fresh water bodies to decrease, the dissolved oxygen decreases, and the water quality deteriorates, seriously endangering aquatic ecosystems and human health. At present, my country's freshwater eutrophication situation is severe, and the total phosphorus concentration of lakes and reservoirs remains high (60% of the water body has a total phosphorus content higher than 0.05mg / L). Water supply requirements fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28
CPCB01J20/12C02F1/281
Inventor 张润宇邹银洪王立英
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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