Soil in-situ remediation composites for efficient removal of heavy metals

Abstract

The invention discloses an in-situ soil remedying composite material capable of efficiently removing heavy metals. The in-situ soil remedying composite material comprises the following components: 10-20 parts of sodium persulfate, 5-10 parts of sodium polyepoxysuccinate, 1-5 parts of polyvinylpyrrolidone, 1-3 parts of nanocarbon, 1-5 parts of serpentine, 5-10 parts of lignite humate, 1-3 parts ofa surfactant, 4-8 parts of calcium dioxide, 4-8 parts of Chinese herbal residue, 1-3 parts of potassium permanganate, 1-5 parts of red mud particles, 1-5 parts of chitosan dithiocarbamate and 1-3 parts of methacryloyloxyethyl trimethylammonium chloride. The in-situ soil remedying composite material can remedy soil contaminated by various heavy metals (such as Pb, Cd, Cu, Zn, Cr and As) and toxic organic substances (such as chlorinated organic compounds, brominated organic compounds and antibiotics), reduces conditions of strong heavy metal activity and strong bioavailability in the soil, prevents transfer of the heavy metals from the soil to plants, prevents bioenrichment and amplification of the heavy metals, can efficiently remove the heavy metals such as chromium and mercury from the soil, and restores original functions of the soil, so that needs of agricultural development are met, and the ecological safety of crops and other plants is guaranteed, and the ecological risks of the bioamplification and the enrichment of the heavy metals to people are avoided.

Description

technical field [0001] The invention relates to soil remediation, in particular to a soil in-situ remediation composite material for efficiently removing heavy metals. Background technique [0002] Soil is the most active layer of the earth's surface system, the cornerstone for human survival and development, and an important material basis for ensuring the safety of human food and ecological environment. With the development of industry and the modernization of agricultural production, heavy metal pollution in soil has become one of the main problems that endanger the quality of the global environment. Heavy metal elements are potential pollutants, which are difficult to be degraded by soil microorganisms. Once they enter the soil, it is very difficult to treat them. Soil heavy metal pollution mainly comes from industrial production, agricultural production and transportation. They will not only lead to the decline of soil vitality and reduce food production, but also can...

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Problems solved by technology

However, the restoration plants described in this method are annual crops, the cycle is long, and the restoration time is relatively slow.

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