Biochar-loaded zero-valent iron composite material and preparation method thereof

Abstract

The invention belongs to the technical field of organic matter catalytic degradation materials, and provides a biochar-loaded zero-valent iron composite material and a preparation method thereof. Thepreparation method comprises the following steps that 1, a biomass material is mixed with an aqueous solution of an iron source, and ultrasonic dispersion is carried out to obtain a raw material mixture, wherein the iron source is at least one of iron salt and ferrous salt; 2, a hydrothermal reaction is carried out on the raw material mixture to obtain an iron-carbon precursor; 3, the iron-carbonprecursor is calcined in an inert gas atmosphere to obtain the biochar-loaded zero-valent iron composite material. According to the method, a reducing agent is not needed, the raw materials are cheapand easy to obtain, the amount of generated wastewater is small, the operation is simple, and the method is an environment-friendly process.

Description

technical field

[0001] The invention relates to the technical field of organic matter catalytic degradation materials, in particular to a biochar-loaded zero-valent iron composite material and a preparation method thereof. Background technique

[0002] The standard reduction potential E of zero-valent iron Fe(0) 0 =(Fe 2+ / Fe=-0.44V), its chemical properties are very active and have strong reducibility. Zero-valent iron has a good application prospect in the degradation of inorganic and organic pollutants, but due to the high activity of zero-valent iron, it is very easy to react with oxygen in the air to form an oxide film, which reduces the reaction rate. Zero-valent iron itself has a magnetic effect and is prone to agglomeration, which will reduce its reactivity and migration rate, which seriously hinders the wide application of zero-valent iron. Therefore, optimizing the modification of zero-valent iron to improve its stability and reactivity has become a research hot...

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