Ferro-manganese binary metallic oxide modified haydite for removing phosphorus and preparation method thereof

A binary metal and oxide technology, applied in the field of water treatment, can solve the problems of poor effluent quality and loss, and achieve the effects of improving efficiency, prolonging service life and high porosity

Inactive Publication Date: 2015-10-21
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the iron-manganese binary metal oxide phosphorus-removing adsorbent prepared by the co-precipitation method is often at the nanometer level, which is easy to be lost, resulting in poor effluent quality.

Method used

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  • Ferro-manganese binary metallic oxide modified haydite for removing phosphorus and preparation method thereof
  • Ferro-manganese binary metallic oxide modified haydite for removing phosphorus and preparation method thereof
  • Ferro-manganese binary metallic oxide modified haydite for removing phosphorus and preparation method thereof

Examples

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experiment example

[0034] Experimental example Preparation of iron-manganese binary metal oxide

[0035] Weigh 39.5g of potassium permanganate and 69.5g of ferrous sulfate powder, dissolve and set the volume in 1000mL and 500mL volumetric flasks, respectively prepare potassium permanganate solution with a concentration of 0.25mol / L and ferrous sulfate with a concentration of 0.5mol / L iron solution. In order to prevent oxidation, the ferrous sulfate solution needs to be prepared and used immediately.

[0036] Measure 160mL potassium permanganate and 400mL ferrous sulfate solution, pour 160mL potassium permanganate solution into a 1000mL beaker, and prepare a mechanical stirrer above the beaker. Start stirring at room temperature, slowly add 400mL of ferrous sulfate solution, and adjust the pH of the mixed solution to about 10 with 2.5mol / L sodium hydroxide solution after adding 50mL of ferrous sulfate solution until the ferrous sulfate solution is completely exhausted. The molar ratio of mangan...

Embodiment 1

[0044] The volcanic rock ceramsite with a particle size of 1-2mm was washed three times with deionized water, dried naturally, and then dried in an oven at 105°C until constant weight. After cooling to room temperature, it was stored in a dry box and used as an adsorption substrate for subsequent experiments.

[0045]Take by weighing 31.6g potassium permanganate and 55.6g ferrous sulfate (FeSO 4 ·7H 2 O) powder, dissolve and settle to volume in 1000mL and 500mL volumetric flasks, respectively prepare potassium permanganate solution with a concentration of 0.2mol / L and ferrous sulfate solution with 0.4mol / L. In order to prevent oxidation, the ferrous sulfate solution needs to be prepared and used immediately.

[0046] Measure 200mL of potassium permanganate and 400mL of ferrous sulfate solution, pour 200mL of potassium permanganate solution into a 1000mL beaker, add 80.0g of dried volcanic rock ceramsite at the same time, and prepare a mechanical stirrer above the beaker.

...

Embodiment 2

[0051] Weigh 31.6g of potassium permanganate and 83.4g of ferrous sulfate powder, dissolve and set the volume in 1000mL and 500mL volumetric flasks, respectively prepare potassium permanganate solution with a concentration of 0.2mol / L and ferrous sulfate with a concentration of 0.6mol / L iron solution. In order to prevent oxidation, the ferrous sulfate solution needs to be prepared and used immediately.

[0052] Measure 200mL of potassium permanganate and 400mL of ferrous sulfate solution, pour 200mL of potassium permanganate solution into a 1000mL beaker, and add 80.1g at the same time (because ceramsite is not a powder, it is difficult to weigh the integer mass in the actual weighing process) . The volcanic rock ceramsite after drying similarly with embodiment 1, prepare mechanical stirrer above the beaker.

[0053] Start stirring at room temperature, slowly add 400mL ferrous sulfate solution, and adjust the pH of the mixed solution to about 10 with 5mol / L sodium hydroxide ...

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Abstract

The invention provides a preparation method of ferro-manganese binary metallic oxide modified haydite for removing phosphorus. The method comprises the steps that 1, haydite is mixed with a potassium permanganate solution, and a ferrous sulfate solution is added in a stirring condition, wherein the mass-volume ratio of the haydite to the potassium permanganate solution is 8 g:10-30 mL, and the continuous stirring is conducted for 18-25 hours after the ferrous sulfate solution is added; 2, after stirring is completed, the haydite is separated from a reaction mixture to be dried, sintering is conducted on the dried haydite for 2-6 h at the temperature ranging from 280 DEG C to 550 DEG C, and the ferro-manganese binary metallic oxide modified haydite is obtained after the haydite is taken out and cooled. A ferro-manganese binary metallic oxide which is adopted by the prior art has the defect of being small in particle, according to the preparation method of the ferro-manganese binary metallic oxide modified haydite for removing the phosphorus, the ferro-manganese binary metallic oxide modified haydite is prepared according to the actual situation that water in a filter tank or a constructed wetland flows to wash padding in engineering applications, the ferro-manganese oxide and the haydite are combined tightly, the effect of removing the phosphorus is improved, the cost of removing the phosphorus is reduced, and the service life of the padding is prolonged.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for preparing a water treatment phosphorus removal filler and a product obtained therefrom. Background technique [0002] Excessive phosphorus in the water environment will cause eutrophication of the water body, resulting in excessive growth of algae and aquatic plants, a large consumption of dissolved oxygen in the water, and death of fish and other aquatic organisms. Therefore, how to efficiently remove phosphorus in water to control eutrophication has always been a research hotspot in the field of water treatment. [0003] Commonly used methods for phosphorus removal in water at home and abroad include chemical methods, biological methods, and adsorption methods. Among them, adsorption phosphorus removal has attracted more and more attention in recent years due to its advantages of high efficiency, low cost, wide application range, and no secondary polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F1/58
Inventor 杜晓丽韩强王建富龙昊川李俊奇吴洋
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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