Contaminated soil remediation material based on minerals and preparation method thereof

Abstract

The invention discloses a contaminated soil remediation material based on minerals and a preparation method of the contaminated soil remediation material. The contaminated soil remediation material comprises a mineral material, passivation materials, a clay material, ferric salt and aluminum salt. The mineral material is prepared from the following components in parts by weight: 15-35 parts of zeolite, 6-20 parts of quartz, 3-18 parts of talc, 5-15 parts of barite, 10-26 parts of micalex and apatite. According to the invention, zeolite, quartz, talc and other mineral substances are used as main materials, a plurality of different types of passivation materials are added, and various advantages of the passivation materials are combined, heavy metal components of acid soil can be adsorbed and repaired, pH of the soil can be rapidly increased through lime and other passivation materials, Cd, Pb, Cu, Zn and other heavy metals are promoted to be adsorbed by the soil or form hydroxide precipitates, and meanwhile the lime and other passivation materials have high water solubility and easily permeate into gaps of the soil.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a mineral-based contaminated soil remediation material and a preparation method thereof. Background technique [0002] Soil pollutants can be roughly divided into two categories: inorganic pollutants and organic pollutants. Inorganic pollutants mainly include acids, alkalis, heavy metals, salts, compounds of radioactive elements cesium and strontium, and compounds containing arsenic, selenium, and fluorine. Organic pollutants mainly include organic pesticides, phenols, cyanide, petroleum, synthetic detergents, 3,4-benzopyrene, and harmful microorganisms brought by urban sewage, sludge and manure. If it exceeds the self-purification capacity of the soil, it will cause changes in the composition, structure and function of the soil, inhibit the activity of microorganisms, and gradually accumulate harmful substances or their decomposition products in the soil through "soil →...

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Problems solved by technology

[0003] Soil remediation currently on the market can be roughly divided into three methods: physical, chemical and biological. The overall structure of the remediation materials is relatively simple, the remediation performance is not strong, and its water solubility is not high during use, so it cannot quickly penetrate into the soil. In the voids of the soil, the functionality is poor, and it cannot have sufficient adsorption and filtration effects for the contaminated soil, and there are certain limitations in use.

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