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Phosphorus removal material as well as preparation method and application thereof

A technology of diatomite and lower layer, which is applied in the field of phosphorus removal materials and its preparation, can solve the problems of not meeting the needs of wastewater treatment, limited adsorption capacity of activated carbon, and increasing the cost of sewage treatment, etc., achieving low cost, good removal effect, and easy treatment Effect

Pending Publication Date: 2020-09-11
GUIZHOU MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of phosphorus removal depends on the amount of calcium hydroxide input. When the amount of calcium hydroxide input is too much and the pH of the solution is alkaline, Fe 3+ and Al 3+ OH in water - A reaction occurs to form Fe(OH) 3 Precipitation and Al(OH) 3 precipitation, and the added Al 3+ It is also toxic to the human body and will increase the cost of sewage treatment
The adsorption method mainly uses activated carbon adsorption, but the adsorption capacity of activated carbon is limited, which cannot meet the increasing demand for wastewater treatment

Method used

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  • Phosphorus removal material as well as preparation method and application thereof
  • Phosphorus removal material as well as preparation method and application thereof
  • Phosphorus removal material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0053] This embodiment provides a method for preparing a phosphorus removal material, comprising the following steps:

[0054] S1, the preparation of original diatomite:

[0055] Weigh 200g of diatomite, put it into a 500ml beaker, add dilute sulfuric acid with a volume concentration of 30%, until the diatomite is submerged, dilute sulfuric acid reacts with impurities in the diatomite to generate bubbles, and after no bubbles are produced, Add water to wash, leave to stand for stratification, pour out the upper layer of clear water, then add 400ml of sulfuric acid with a concentration of 30%, add water to wash, stand for stratification, repeat the operation 3 times, take off the layer, put it in a drying box, and dry it at 80 Dry at ℃ to constant weight, grind after drying, sieve with 200-mesh sieve, and calcinate at 400℃ for 2 hours to obtain the original diatomite.

[0056] S2, preparation of phosphorus removal material:

[0057] Weigh 2.4g of glycine, 8g of calcium hydrox...

Embodiment 2

[0061] This embodiment provides a method for preparing a phosphorus removal material, comprising the following steps:

[0062] S1, the preparation of original diatomite:

[0063] Weigh 200g of diatomite, put it into a 500ml beaker, add dilute sulfuric acid with a volume concentration of 30%, until the diatomite is submerged, dilute sulfuric acid reacts with impurities in the diatomite to generate bubbles, and after no bubbles are produced, Add water to wash, leave to stand for stratification, pour out the upper layer of clear water, then add 400ml of sulfuric acid with a concentration of 30%, add water to wash, stand for stratification, repeat the operation 3 times, take off the layer, put it in a drying box, and dry it at 90 Dry at ℃ to constant weight, grind after drying, then sieve with 200-mesh sieve, and then calcined at 400℃ for 2 hours to obtain the original diatomite.

[0064] S2, preparation of phosphorus removal material:

[0065] Weigh 2.4g of glycine, 8g of calci...

Embodiment 3

[0069] This embodiment provides a method for preparing a phosphorus removal material, comprising the following steps:

[0070] S1, the preparation of original diatomite:

[0071] Weigh 200g of diatomite, put it into a 500ml beaker, add dilute sulfuric acid with a volume concentration of 30%, until the diatomite is submerged, dilute sulfuric acid reacts with impurities in the diatomite to generate bubbles, and after no bubbles are produced, Add water to wash, stand to separate layers, pour out the upper layer of clear water, then add 400ml of sulfuric acid with a concentration of 30%, add water to wash, stand to separate layers, repeat the operation 3 times, remove the layer, put it in a drying box, and dry it at 85 Dry at ℃ to constant weight, grind after drying, then sieve with 200-mesh sieve, and then calcined at 400℃ for 2 hours to obtain the original diatomite.

[0072] S2, preparation of phosphorus removal material:

[0073] Weigh 2.4g of glycine, 8g of calcium hydroxid...

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Abstract

The invention relates to a phosphorus removal material as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method comprisesthe following steps: weighing 200g of diatomite, adding sulfuric acid with the volume concentration of 30% until submerging the diatomite, adding water for washing after no bubbles are generated, standing for layering, taking a lower layer, drying to constant weight, grinding, sieving, and calcining to obtain original diatomite; weighing 2.4 g of glycine, 8g of calcium hydroxide and 6g of diatomite, adding water until the glycine, the calcium hydroxide and the diatomite are submerged, uniformly stirring, carrying out ultrasonic treatment to obtain a mixture, taking out the mixture, drying to constant weight, grinding and sieving to obtain the phosphorus removal material. The invention further discloses the phosphorus removal material prepared through the preparation method and applicationof the phosphorus removal material. The preparation method has the effects that the preparation process is simple, large-scale popularization and application are facilitated, and the prepared phosphorus removal material is high in phosphorus removal rate and is slightly influenced by the pH value.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a phosphorus removal material and its preparation method and application. Background technique [0002] Diatomaceous earth, scientific name is amorphous silica, is a kind of siliceous rock, which is very rich in reserves in our country. Diatomite has the characteristics of large specific surface area, strong adsorption and stable chemical properties, and is now more and more used in the field of water treatment. [0003] Wastewater discharge in our country has increased by about 70% from 2000 to 2013. As of 2015, there were only 5,364 sewage treatment plants in my country, with a daily processing capacity of about 170 million t / d. The wastewater treatment capacity is very weak, which means that more economical and rapid treatment methods are needed. [0004] At present, phosphorus removal methods mainly include biological methods, chemical methods and adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/10
CPCB01J20/22B01J20/14B01J20/041C02F1/288C02F2101/105
Inventor 王志康周业葛秋诗华雪
Owner GUIZHOU MINZU UNIV
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