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Preparation method of phosphate adsorbent with high adsorption selectivity

A phosphate adsorbent, selective technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water treatment parameter control, etc., can solve the problems of low adsorption selectivity, phosphorus impurities, etc., and achieve the goal of improving adsorption selectivity Effect

Active Publication Date: 2020-10-02
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the technical problem to be solved by this invention is to provide a kind of preparation method of high adsorption selectivity phosphate adsorbent, this adsorbent has high to phosphate Adsorption selectivity, which can solve the problem of many impurities in the recovered phosphorus due to the low selectivity of phosphate adsorbents for phosphate adsorption

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  • Preparation method of phosphate adsorbent with high adsorption selectivity
  • Preparation method of phosphate adsorbent with high adsorption selectivity
  • Preparation method of phosphate adsorbent with high adsorption selectivity

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Effect test

Embodiment 1

[0020] The preparation method of the high adsorption selectivity phosphate adsorbent of the present invention specifically comprises the following steps:

[0021] (1) Ultrasonic dispersion of modified attapulgite in deionized water to form attapulgite suspension;

[0022] (2) Slowly add humic acid and zirconium dioxide to the attapulgite suspension, the mass ratio of attapulgite, humic acid and zirconium dioxide is 1: 0.3: 0.1; the mixed solution is continuously ultrasonicated for 30 minutes, Then stirred and reacted in a water bath at 70° C. for 2 hours. After the reaction was completed, the obtained mixture was dried in an oven at 110° C. and passed through a 0.074 mm sieve to obtain a mixture A;

[0023] (3) Add a certain amount of polyhydroxyalkanoate into chloroform, and stir slowly. After the polyhydroxyalkanoate is completely dissolved, add mixture A to chloroform, and continue to stir until mixture A is completely dispersed in In chloroform, the addition mass ratio of...

Embodiment 2

[0031] The preparation method of the high adsorption selectivity phosphate adsorbent of the present invention specifically comprises the following steps:

[0032] (1) Ultrasonic dispersion of modified attapulgite in deionized water to form attapulgite suspension;

[0033] (2) Slowly add humic acid and zirconium dioxide to the attapulgite suspension, the mass ratio of attapulgite, humic acid and zirconium dioxide is 1: 0.3: 0.3; the mixed solution is continuously ultrasonicated for 30 minutes, Then stirred and reacted in a water bath at 70° C. for 2 hours. After the reaction was completed, the obtained mixture was dried in an oven at 110° C. and passed through a 0.074 mm sieve to obtain a mixture A;

[0034] (3) Add a certain amount of polyhydroxyalkanoate into chloroform, and stir slowly. After the polyhydroxyalkanoate is completely dissolved, add mixture A to chloroform, and continue to stir until mixture A is completely dispersed in In chloroform, the addition mass ratio of...

Embodiment 3

[0039] The preparation method of the high adsorption selectivity phosphate adsorbent of the present invention specifically comprises the following steps:

[0040] (1) Ultrasonic dispersion of modified attapulgite in deionized water to form attapulgite suspension;

[0041](2) Slowly add humic acid and zirconium dioxide to the attapulgite suspension, the mass ratio of attapulgite, humic acid and zirconium dioxide is 1: 0.4: 0.5; the mixed solution is continuously ultrasonicated for 30 minutes, Then stirred and reacted in a water bath at 70° C. for 2 hours. After the reaction was completed, the obtained mixture was dried in an oven at 110° C. and passed through a 0.074 mm sieve to obtain a mixture A;

[0042] (3) Add a certain amount of polyhydroxyalkanoate into chloroform, and stir slowly. After the polyhydroxyalkanoate is completely dissolved, add mixture A to chloroform, and continue to stir until mixture A is completely dispersed in In chloroform, the addition mass ratio of ...

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Abstract

The invention discloses a preparation method of a phosphate adsorbent with high adsorption selectivity, which specifically comprises the following steps: (1) ultrasonically dispersing modified attapulgite in water to obtain an attapulgite suspension; (2) adding humic acid and zirconium dioxide into the attapulgite suspension, stirring to obtain a mixed material, heating the mixed material in a water bath, and drying and sieving the heated mixture to obtain a mixture A; (3) adding polyhydroxyalkanoate into a volatile organic solvent, stirring until the polyhydroxyalkanoate is completely dissolved in the organic solvent, then adding the mixture A in the step (2) into the organic solvent, and continuously stirring until the mixture A is completely dispersed in the solvent; and (4) when the solution is in a semi-solid state, extruding the solution into a plurality of granular materials, and after the volatile organic solvent in the granular materials is completely volatilized, cleaning anddrying the granular materials to obtain the phosphate adsorbent. The phosphate adsorbent disclosed by the invention has high adsorption selectivity on phosphate.

Description

technical field [0001] The invention relates to a preparation method of a phosphate adsorbent, in particular to a preparation method of a highly selective phosphate adsorbent. Background technique [0002] Eutrophication of water body refers to the phenomenon that the excessive input of nutrients in the water body causes the wild growth of algae and other species, resulting in the imbalance of water ecology and the destruction of water quality. With the development of economy and society, environmental pollution is increasing day by day, and the phenomenon of eutrophication in water body is especially obvious. According to reports, nearly 75% of my country's water bodies of all levels and types have varying degrees of eutrophication, resulting in the loss of water body functions of a large number of surface water bodies, frequent occurrence of red tides in coastal waters, and even groundwater in some areas have been polluted to varying degrees. Studies have shown that exces...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/24B01J20/12B01J20/28016B01J20/305B01J20/3007C02F1/288C02F2101/105C02F2209/18Y02W10/10
Inventor 冯骞葛冉王苏娜薛朝霞方芳罗景阳操家顺李超
Owner HOHAI UNIV
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