Preparation method and application of tea seed shell biochar

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...

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

Images