Method for preparing soil conditioner by using graphene

Abstract

The invention discloses a method for preparing a soil conditioner by using graphene, and relates to the technical field of soil treatment. The method comprises the following steps: S1, preparing a complex microbial inoculant; S2, mixing the complex microbial inoculant with organic matters to obtain a mixture A; S3, carrying out granulation and programmed heat treatment on the mixture A, to obtain a conditioner component A; S4, preparing a graphene oxide composite material; S5, mixing the graphene oxide composite material with expanded vermiculite powder and a plant waste fertilizer to obtain a mixture B; S6, carrying out granulation and programmed heat treatment on the mixture B to obtain a conditioner component B; and S7, mixing the conditioner component A with the conditioner component B to obtain the soil conditioner prepared from graphene. The soil conditioner prepared by the method can adsorb heavy metals in soil and regulate the pH value, microbial biomass and enzymatic activity of the soil, does not cause adverse effects on the physical structure of the soil, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of soil treatment, in particular to a method for preparing a soil conditioner by using graphene. Background technique [0002] Soil improver, also known as soil conditioner, usually refers to a material that can improve soil physical properties and promote crop nutrient absorption without providing plant nutrients. It is widely used to prevent soil erosion, reduce soil water evaporation or excessive transpiration , Saving irrigation water, promoting healthy growth of plants. Traditional soil improvement methods, such as adding sand to clay, adding loam to sand, etc., the added substances can be called natural soil improvers. There is also technology to use organic matter extracts, natural minerals or artificial high molecular polymers to synthesize soil conditioners. [0003] Graphene is a material that has been widely used in various fields in recent years. There are also related researches in soil condit...

AI Technical Summary

Problems solved by technology

However, the current conditioners prepared by similar soil conditioner preparation methods can all absorb heavy metals and improve the soil environment, but their ability to adjust soil pH is low, and there is no adjustment for the number of soil microorganisms and enzyme activities. The particle structure of the conditioner is simple, and it is easy to wet and bond when used in the soil, which will have a negative impact on the physical shape of the soil, such as the aggregate structure, and reduce the performance of the soil such as air permeability and saturated hydraulic conductivity. It will also reduce the conditioning effect of the conditioner itself on the soil.