Contaminated soil surface barrier material and preparation method thereof

The invention relates to the field of soil remediation, in particular to a contaminated soil surface barrier material which is formed by taking a gelatinizing agent, inert filler, polymer powder or emulsion, an additive and water as raw materials, uniformly mixing the raw materials and then curing the raw materials on a substrate to form a film. The invention also provides a preparation method ofthe contaminated soil surface barrier material, and the preparation method comprises the following steps: firstly, uniformly mixing the gelatinizing agent and the inert filler according to a certain mass ratio to prepare a component A; secondly, uniformly mixing the polymer powder or the emulsion, the additive and water to prepare a component B; and finally, slowly adding the component A into thecomponent B, uniformly stirring to prepare a uniform slurry of the surface barrier material, coating a substrate with the slurry, and curing to form a film, thereby obtaining the contaminated soil surface barrier material. The