Heteroatom-loaded biomass charcoal material and application thereof

Abstract

The invention provides a heteroatom-loaded biomass charcoal material and application thereof, belonging to the field of environmental protection. The biomass charcoal material is obtained by mixing straw, a nitrogen source, a phosphorus source, a sulfur source and a boron source, and conducting programmed heating and carbonizing through a muffle furnace program. The biomass charcoal material is wide in source and friendly to environment, and can efficiently activate persulfate under normal temperature and natural conditions so as to repair organic pollution of soil; the biomass charcoal material and heteroatoms loaded on the biomass charcoal material cannot cause adverse effects on the ecological environment of the soil, can remarkably increase the content of nutrients such as soil organic matters so as to achieve an improvement effect on the soil; and therefore, the biomass charcoal material is easy to popularize and apply.

Description

technical field [0001] The application relates to the field of environmental protection, in particular to a heteroatom-loaded biomass carbon material and its application in activated persulfate. Background technique [0002] With the acceleration of urbanization, a large number of industrial pollutants involving coking, chemical, petroleum and other industries are discharged into the soil, resulting in a large number of organic pollution sites. How to quickly and effectively repair organic pollution sites is a problem that must be solved at present. Chemical oxidation remediation technology has the advantages of high remediation efficiency, short cycle, low cost, and insensitivity to pollutant types and concentrations, and is one of the commonly used technologies for remediating polluted soil. [0003] Advanced Oxidation Process (AOPs) is a general term for a series of reaction processes to oxidize and degrade organic pollutants based on the high oxidation potential of free ...

AI Technical Summary

Problems solved by technology

The traditional persulfate activation technology consumes a lot of energy and costs high, and metal-based catalytic materials activate persulfate, which has the problem of metal ion leaching and secondary pollution.

In order to reduce the risk of secondary pollution, scholars at home and abroad have begun to devote themselves to the development of new heterogeneous catalysts, such as nano-copper ferrite, nano-Co 3 o 4 Activation materials such as these materials are often too expensive to be widely used; 2+ It also has certain toxicity, which may cause potential harm to the operator, further limiting the application of this technology

[0006] In addition, the existing biochar preparation technology is to heat up to 100°C for 2 hours, and then rise to 300°C, 400°C, 500°C, 600°C, and 700°C respectively, with a temperature gradient of 10°C / min, and hold for different times, and then recover Biochar is obtained at room temperature; however, this method raises the temperature to the pyrolysis temperature of 100°C in one step and then keeps it for 2 hours. The temperature is low, the pyrolysis process is not complete, and a good pyrolysis effect cannot be achieved. The subsequent temperature is directly raised to the design temperature, and the carbonization product The performance of biochar is relatively poor, which is not conducive to the subsequent utilization of biochar

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