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Hydrothermal carbon/hydrated calcium silicate coupling material as well as preparation method and application thereof

A technology of hydrated calcium silicate and hydrothermal carbon, which is applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc. It can solve the problem that phosphorus removal materials are difficult to recycle, easy to agglomerate, and poor phosphorus removal effect To achieve the effect of improving phosphorus removal performance, preventing agglomeration, and being easy to recycle

Active Publication Date: 2021-09-07
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a hydrothermal carbon / hydrated calcium silicate coupling material, its preparation method and application, Its purpose is to evenly load calcium silicate hydrate on the hydrothermal carbon skeleton, on the one hand, provide good reaction sites for the phosphorus removal reaction through the special microscopic morphology of the hydrothermal carbon, and on the other hand, through the granular hydrothermal carbon The load prevents the agglomeration of calcium silicate hydrate and realizes the convenient recycling of calcium silicate hydrate phosphorus removal materials, thereby solving the technical problems that calcium silicate hydrate phosphorus removal materials are difficult to recycle and easy to agglomerate, resulting in poor phosphorus removal effect

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  • Hydrothermal carbon/hydrated calcium silicate coupling material as well as preparation method and application thereof
  • Hydrothermal carbon/hydrated calcium silicate coupling material as well as preparation method and application thereof
  • Hydrothermal carbon/hydrated calcium silicate coupling material as well as preparation method and application thereof

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preparation example Construction

[0032] At the same time, the present invention provides a preparation method for the hydrothermal carbon / calcium silicate hydrate coupling material, which adopts a one-step method, and the specific steps are as follows:

[0033] (1) Add water-insoluble carbohydrates with a particle size of 60-200 mesh at a mass ratio of 10.3-51.5:1 to the calcium silicate hydrate precursor, so that the mass ratio of calcium element to water-insoluble carbohydrates is 1:1-10 In between, the precursor slurry is obtained; the water-insoluble carbohydrates are preferably cellulose-based carbon source materials, such as rice husk powder and cottonseed hulls, which have a wide range of sources, and most of them are recycled agricultural waste, with low cost and convenient processing;

[0034] The calcium silicate hydrate precursor solution contains 0.2-1mol / L SiO 3 2- ion solution and containing 0.5 ~ 2mol / L Ca 2+ Ions, wherein the molar ratio of Ca and Si is between 0.8 and 2:1;

[0035] (2) hea...

Embodiment 1

[0046] A method for preparing a hydrothermal carbon / calcium silicate hydrate coupling material, which adopts a one-step method, and the specific steps are as follows:

[0047] (1) First configure 500mL of 0.5mol / L Na 2 SiO 3 Solution and configuration 250mL of 1mol / L CaCl 2 solution. Then add the above 10mL Na 2 SiO 3 solution and 5 mL of CaCl 2 Solution, make the molar ratio of Ca and Si in the mixed solution be 1:1, stir;

[0048] According to the ratio of calcium: water-insoluble carbohydrate mass ratio of 1:1, crush and sieve 80-mesh rice husk powder as water-insoluble carbohydrate and add it to the sample dissolving cup; stir and mix the flocculent slurry appropriately, which is the precursor slurry material;

[0049] (2) Put the sample dissolving cup on the sealed cup cover, put on the protective coat, put it into the reaction tank frame, tighten it with a 2N torque wrench, put it into the microwave digestion instrument, and connect the temperature probe and press...

Embodiment 2

[0055] A method for preparing a hydrothermal carbon / calcium silicate hydrate coupling material, which adopts a one-step method, and the specific steps are as follows:

[0056] (1) First configure 500mL of 1mol / L Na 2 SiO 3 Solution and configuration 250mL of 0.5mol / L CaCl 2 solution. Then add the above 4mL Na 2 SiO 3 solution and 16 mL of CaCl 2 Solution, make the molar ratio of Ca and Si in the mixed solution be 2:1, stir;

[0057] According to the ratio of calcium: water-insoluble carbohydrate mass ratio of 1:5, weigh and crush rice husk powder and sieve 80-mesh rice husk powder as water-insoluble carbohydrate and add it to the sample dissolving cup; stir and mix the flocculent slurry appropriately, which is the precursor slurry ;

[0058] (2) Put the sample dissolving cup on the sealed cup cover, put on the protective coat, put it into the reaction tank frame, tighten it with a 2N torque wrench, put it into the microwave digestion instrument, and connect the temperat...

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Abstract

The invention discloses a hydrothermal carbon / hydrated calcium silicate coupling material as well as a preparation method and application thereof. The material comprises a hydrothermal carbon skeleton and hydrated calcium silicate solid powder in a mass ratio of (0.25-1.25): 1, the hydrated calcium silicate solid powder is uniformly attached to the hydrothermal carbon skeleton; a one-step method is adopted for preparation. According to the hydrothermal carbon / hydrated calcium silicate coupling material provided by the invention, the hydrated calcium silicate is loaded on the hydrothermal carbon substrate through microwave hydrothermal treatment to prepare the coupling material, the agglomeration of the hydrated calcium silicate in a water body is effectively prevented, meanwhile, the adsorption effect of the hydrothermal carbon on phosphorus can be exerted, and the phosphorus removal performance is obviously improved compared with a hydrated calcium silicate material.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and more specifically relates to a hydrothermal carbon / calcium silicate hydrate coupling material, its preparation method and application. Background technique [0002] Phosphorus is a non-renewable non-metallic mineral resource. With the rapid development of economy and society, the demand for phosphorus continues to increase. my country is rich in phosphate rock resources, but there are more lean ore and less rich ore, and more difficult ore and less easy beneficiation. Phosphate rock has been listed as one of the 24 national strategic mineral catalogs by the Ministry of Natural Resources of my country. On the other hand, the current annual sewage discharge in my country is about 130 billion tons, of which about 621,000 tons of phosphorus are discharged. A large amount of phosphorus in sewage is discharged without recovery, which will make my country face the challenge of wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20C02F1/283B01J20/04C02F2101/105
Inventor 江卢华李科威刘学端刘少博
Owner CENT SOUTH UNIV
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