Magnetic Fagopyrum tataricum shell biochar preparation method

Abstract

The invention discloses a magnetic Fagopyrum tataricum shell biochar preparation method, which comprises: S1, immersing Fagopyrum tataricum shell in deionized water for 30 min, cleaning, and drying ina drying box at a temperature of 105 DEG C; S2, crushing the Fagopyrum tataricum shell, and screening, wherein the screening hole has a diameter of 0.075 mm, and the sieve is a 200 mesh sieve; S3, mixing activators FeCl3.6H2O and FeCl2.4H2O according to a molar ratio of Fe<3+> to Fe<2+> of 2:1, adding 370 ml of deionized water, and completely dissolving; S4, adding 15 g of the Fagopyrum tataricumshell, adding 30 ml of concentrated ammonia water, carrying out high speed stirring for 1 h, carrying out sealing standing for 1 h, washing with ultrapure water to achieve a neutral state, placing inan oven at a temperature of 70 DEG C, and drying to achieve a constant weight to obtain magnetic Fagopyrum tataricum shell; and S5, carrying out sealed heating on the magnetic Fagopyrum tataricum shell in a muffle furnace at a temperature of 700 DEG C, carrying out carbonization for 3 h, and storing in a dryer after the heating is completely performed so as to obtain the magnetic Fagopyrum tataricum shell biochar. In the prior art, the biomass charcoal cannot effectively remove heavy metals from polluted water bodies, the recovery is difficult, the process is complex, the cost is high, and secondary pollution is easily generated. According to the present invention, the problems in the prior art can be solved.

Description

technical field [0001] The invention relates to the field of magnetic biochar, in particular to a preparation method of magnetic tartary buckwheat shell biochar. Background technique [0002] With the acceleration of my country's industrialization process, people's demand for mineral resources is also increasing. However, with the mining, processing and utilization of more and more heavy metal mineral resources, the industrial wastewater containing heavy metal pollutants has also increased. More importantly, most of the waste water produced during the mining, processing and utilization of heavy metal minerals is much higher than the national discharge standard, which has led to more and more serious heavy metal pollution of water bodies and soils. [0003] Taking industrial heavy metal lead as an example, studies have found that excessive intake of lead can cause serious damage to living organisms. It can damage the central nervous system, and has certain harm to the kidne...

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Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention provides a method for preparing magnetic tartary buckwheat shell biochar, which solves the problems that the previous biochar cannot efficiently remove heavy metals in polluted water, is difficult to recycle, has complicated processes, and high cost. Easy to produce secondary pollution problems

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