Modified charcoal microballoon, and preparation method and application thereof

A biochar modification technology, applied to chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of resource waste, secondary pollution, incineration, etc., and achieve cost-friendly, high removal rate, The effect of avoiding secondary pollution

Active Publication Date: 2016-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As a kind of high-efficiency denitrification and phosphorus removal wetland plant commonly used in artificial wetlands, the planting area of ​​Zailihua is very wide in my country, but if the mature plants of Zailihua are not properly treated by harvesting, the nitrogen and phosphorus absorbed by them will return to the water body cause secondary pollution
Nowadays, due to the lack of corresponding resource utilization technology, most of the harvested Zailihua are burned on the spot or dumped in the open air, causing a lot of waste of resources and environmental problems.

Method used

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  • Modified charcoal microballoon, and preparation method and application thereof
  • Modified charcoal microballoon, and preparation method and application thereof
  • Modified charcoal microballoon, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] 1. Preparation of modified biochar microspheres

[0047] A modified biochar microsphere, the specific steps of its preparation method are as follows:

[0048] (1) After harvesting and cleaning the aboveground stems and leaves of Zailihua at the mature stage, place them in a ventilated environment to dry naturally for a week, then chop and grind them into powder, pass through a 60-mesh sieve, and dry at 85°C for 2 hours to obtain the re- Lihua powder.

[0049] (2) Take 2g of Zailihua powder and put it in 1mol / L MgCl 2 Soak in the solution for 12 hours at 25°C, filter the powder, and rinse repeatedly with deionized water, and dry the rinsed Zailihua powder at 85°C for 6 hours to obtain magnesium-modified Zailihua powder.

[0050] (3) Put the Zailihua powder into the carbonization furnace, feed nitrogen gas, and carry out carbonization. The heating rate is 5°C / min, and the temperature is raised to 500°C, kept for 2 hours, cooled to room temperature, taken out, and passed...

Embodiment 2

[0067] 1. Preparation of modified biochar microspheres

[0068] A modified biochar microsphere, the specific steps of its preparation method are as follows:

[0069] (1) After harvesting and cleaning the aboveground stems and leaves of Zailihua at the mature stage, place them in a ventilated environment to dry naturally for a week, then chop and grind them into powder, pass through a 60-mesh sieve, and dry at 85°C for 2 hours to obtain the re- Lihua powder.

[0070] (2) Take 2g of Zailihua powder and put it in 1mol / L MgCl 2 Soak in the solution for 12 hours at 25°C, filter the powder, and rinse repeatedly with deionized water, and dry the rinsed Zailihua powder at 85°C for 6 hours to obtain magnesium-modified Zailihua powder.

[0071] (3) Put the Zailihua powder into the carbonization furnace, feed nitrogen gas, and carry out carbonization. The heating rate is 10°C / min, and the temperature is raised to 600°C, kept for 3 hours, cooled to room temperature, taken out, and passe...

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Abstract

The invention discloses a modified charcoal microballoon, and a preparation method and an application thereof. The preparation method for the modified charcoal microballoon comprises the following steps: (1) taking thalia dealbata powder, soaking in a soluble magnesium salt solution, filtering, taking out and then drying, thereby obtaining magnesium modified thalia dealbata powder; (2) carbonizing the thalia dealbata powder, thereby obtaining the modified charcoal; (3) taking the modified charcoal, and by taking a sodium alginate solution as an embedding medium and CaCl2 solution as a cross-linking agent, performing gel embedding and drying after embedding, thereby acquiring the modified charcoal microballoon. According to invention, the thalia dealbata powder is modified with magnesium at first, and then the modified thalia dealbata powder is taken as a precursor for carbonization, and lastly, the sodium alga acid solution is taken as the embedding medium for preparing the modified charcoal into microballoon; the obtained modified charcoal microballoon can effectively remove phosphorus from water and the removal rate is high; the abandoned thalia dealbata is recycled, so that the resource utilization of the wastes is realized.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a modified biochar microsphere and its preparation method and application. Background technique [0002] With the rapid development of industry and agriculture in today's society and the increase in population, the situation of eutrophication in my country's water bodies has become more and more severe. According to the "2014 China Environmental Status Bulletin" published by the Ministry of Environmental Protection of my country in 2015, about 24.59% of my country's Most of the lakes and reservoirs are eutrophic water bodies. The eutrophication of water bodies is already the main cause of water shortage in my country. Therefore, how to efficiently remove phosphorus in water bodies is particularly critical. Among the many methods for removing phosphorus from water, the adsorption method has been widely used because of its advantages of high efficiency, low cost, eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/28021C02F1/281C02F2101/105
Inventor 崔孝强杨肖娥姚义强方思雨戴曦吴飞飞
Owner ZHEJIANG UNIV
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