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Preparation method and application of tea seed shell biochar

A tea seed husk and biochar technology, which is applied in the field of heavy metal pollution control and repair, can solve the problems of increased cost and production difficulty, increased cost of biochar, loss of agricultural resources, etc., and achieves good application prospects, easy implementation, and simple use method Effect

Pending Publication Date: 2021-10-29
中国冶金地质总局中南地质调查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of camellia seed oil, 1t of camellia seeds can produce 0.54t of tea seed shells, these tea seed shells are mainly used as solid fuel, and produce a lot of waste gas discharged into the environment, which not only causes the loss of agricultural resources, but also causes environmental pollution
[0006] In the prior art, in order to pursue a better adsorption effect, biochar materials generally need to be modified by adding chemical reagents during the preparation process, such as the Chinese invention patent "CN105797693A - a magnetic chaff for removing lead and cadmium in water bodies Biochar and Its Preparation and Application Method", "CN112263994A-A Modified Biochar and Its Preparation Method and Application", however, the modification has greatly increased the cost of manufacturing biochar, and the wastewater generated during the modification process , Waste will also increase the cost and production difficulty, improper handling will also cause environmental pollution

Method used

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  • Preparation method and application of tea seed shell biochar
  • Preparation method and application of tea seed shell biochar
  • Preparation method and application of tea seed shell biochar

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, and the content of the present invention is not limited to the following embodiments.

[0023] (1) Preparation method

[0024] Tea seed husks were washed, dried and pulverized, and the debris was put into a tube furnace, and the firing temperatures were set at 300°C, 450°C and 600°C, respectively, and N 2 The flow rate is controlled at 80-120mL / min, the heating rate is 10°C / min, N 2 Burn at constant temperature and temperature for 6 hours in an oxygen-limited environment, cool to room temperature after firing, take out the biochar, and pass the biochar through a 100-mesh sieve to obtain tea seed shell biochar, whose particle size is less than 0.150 mm, corresponding to The numbers are C300, C450 and C600 respectively.

[0025] (2) Characterization parameters of biochar-related materials

[0026] With the increase of pyrolysis temperature for biochar ...

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Abstract

The invention relates to the field of heavy metal pollution abatement and remediation, in particular to a preparation method and application of tea seed shell biochar. Dried and crushed tea seed shells are cleaned, fired under the temperature condition of 300 DEG C or above in an N2 oxygen-limited environment, cooled to the room temperature, taken out and ground to obtain the tea seed shell biochar, and the tea seed shell biochar can be applied to treatment of heavy metal cadmium and lead. The tea seed shell biochar with a good cadmium and lead removal effect is obtained only by grinding the tea seed shells and firing the tea seed shells at the high temperature in the N2 oxygen-limited environment; the preparation method is simple and easy to implement; modification is not conducted through chemical reagents, so that the production cost is remarkably reduced; the tea seed shell biochar is environmentally friendly; the use method is simple, the tea seed shell biochar does not need to be mixed with other substances, cadmium and lead can be removed after the tea seed shell biocharis directly put into the soil for a period of time, and the practical production application of the tea seed shell biochar is facilitated.

Description

technical field [0001] The invention relates to the field of heavy metal pollution control and restoration, in particular to a preparation method and application of tea seed shell biochar. Background technique [0002] With the progress of society and the development of modern industry and agriculture, human activities have more and more profound impact on the natural environment. From agricultural chemical fertilizers and pesticides, to industrial "three wastes", to sewage and garbage in daily life, they all affect nature. Random discharge will inevitably lead to various environmental problems, thereby destroying the ecological environment, and may even be harmful to human beings. life and health pose a huge threat. [0003] The environmental crisis caused by heavy metal pollution is one of the hot environmental issues of global concern, among which cadmium and lead are the two most concerned pollutants. Cadmium and lead enter the environment mainly through the mining and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B09C1/00
CPCB01J20/20B01J20/3071B01J20/3078B01J20/3021B09C1/00B01J2220/4881
Inventor 杨育振高宝龙黄屹肖德长罗恒陈飞吴刚张镭
Owner 中国冶金地质总局中南地质调查院
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