Phosphorus adsorbent, and preparation method and application thereof

A phosphorus adsorbent and adsorbent technology, applied in the field of preparation of phosphorus removal adsorbent, can solve the problems of poor adsorption capacity and achieve the effect of reducing the cost of preparation

Inactive Publication Date: 2017-02-01
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, zeolites have strong cation exchange capacity but poor adsorption capacity for negatively charged phosphate in water (the main form of phosphorus in wastewater)

Method used

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  • Phosphorus adsorbent, and preparation method and application thereof
  • Phosphorus adsorbent, and preparation method and application thereof
  • Phosphorus adsorbent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of zirconium magnesium modified zeolite

[0029] Weigh 4g of magnesium chloride hexahydrate and 4g of zirconium oxychloride octahydrate and place them together in a 500mL Erlenmeyer flask, and then add 100mL of deionized water. After dissolving, add 10 g of zeolite and put the Erlenmeyer flask into a 25°C water bath constant temperature shaker and vibrate at a speed of 150 rpm for 30 minutes; then, take out the well-mixed solution and adjust the cone with 1mol / L sodium hydroxide solution. When the pH value of the mixed solution in the shaped bottle reaches 10, continue to put it into the water bath constant temperature oscillator with the same setting as the mixing and vibrate for 1 hour; then use a centrifuge to centrifuge the solid and liquid of the mixture, and use Wash with deionized water repeatedly until the pH of the supernatant is stable to 7; finally, collect the precipitated muddy matter and put it into an oven for drying, set the temperature a...

Embodiment 2

[0049] (1) Preparation of zirconium magnesium modified zeolite

[0050] Weigh 10 g of magnesium sulfate heptahydrate and 2 g of zirconium sulfate tetrahydrate and place them in a 500 mL Erlenmeyer flask, and then add 100 mL of deionized water. After dissolving, add 10 g of zeolite and put the Erlenmeyer flask into a 25°C water bath constant temperature shaker and vibrate at a speed of 150 rpm for 30 minutes; then, take out the well-mixed solution and adjust the cone with 1mol / L sodium hydroxide solution. When the pH value of the mixed solution in the shaped bottle reaches 11, continue to put it into the water bath constant temperature oscillator with the same setting as the mixing for 1 hour; then use a centrifuge to centrifuge the solid and liquid of the mixture, and use Wash with deionized water repeatedly until the pH of the supernatant is stable to 7; finally, collect the precipitated muddy matter and put it into an oven for drying, set the temperature at 105°C, and dry fo...

Embodiment 3

[0060] (1) Preparation of zirconium magnesium modified zeolite

[0061] Weigh 1.5g of magnesium nitrate hexahydrate and 10g of zirconium nitrate pentahydrate and place them together in a 500mL Erlenmeyer flask, then add 100mL of deionized water. After dissolving, add 10 g of zeolite and put the Erlenmeyer flask into a 25°C water bath constant temperature shaker and vibrate at a speed of 150 rpm for 30 minutes; then, take out the well-mixed solution and adjust the cone with 1mol / L sodium hydroxide solution. When the pH value of the mixed solution in the shaped bottle reaches 10, continue to put it into the water bath constant temperature oscillator with the same setting as the mixing and vibrate for 1 hour; then use a centrifuge to centrifuge the solid and liquid of the mixture, and use Wash with deionized water repeatedly until the pH of the supernatant is stable to 7; finally, collect the precipitated muddy matter and put it into an oven for drying, set the temperature at 105...

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Abstract

The invention belongs to the technical fields of adsorbent material preparation and wastewater purification, and relates to a preparation method and application of a phosphorus adsorbent. The preparation method comprises the following steps: dissolving a magnesium salt and a zirconium salt in water to obtain a magnesium/zirconium solution, adding natural zeolite, reacting for some time, regulating the pH value of the solution to alkalinity, continuing reacting to obtain a precipitate, cleaning with deionized water until the supernate is neutral, and drying to obtain the magnesium/zirconium-modified modified zeolite. The preparation cost of the phosphorus adsorbent is lowered on the premise of basically not influencing the phosphorus removal effect. In a soluble-calcium-ion-added solution, the phosphorus adsorbent can efficiently remove phosphates in water.

Description

technical field [0001] The invention belongs to the technical field of adsorbent material preparation and the technical field of wastewater purification, and relates to a preparation method and application of an adsorbent for phosphorus removal. Background technique [0002] The eutrophication of surface water has become one of the most serious water environmental problems facing the world today. Phosphorus is a key nutrient element that causes water eutrophication. Therefore, the removal of phosphorus in wastewater is very important for the prevention and control of eutrophication in water bodies. Phosphorus removal methods in wastewater mainly include biological methods, chemical precipitation methods, crystallization methods, membrane separation methods and adsorption methods. Among them, adsorption method is a method that can effectively remove phosphorus in wastewater. A key technical issue in the application of adsorption to remove phosphorus in wastewater is to sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16C02F1/28B01J20/30C02F101/10
CPCB01J20/165B01J20/0211B01J20/04B01J20/045B01J20/046C02F1/281C02F2101/105
Inventor 林建伟詹艳慧张志斌王丹赫
Owner SHANGHAI OCEAN UNIV
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