Soil remediation agent and preparation method thereof

Abstract

The invention discloses a soil remediation agent. The soil remediation agent is prepared from the following raw materials in parts by weight: 20-35 parts of modified diatomite, 10-20 parts of desulfurized gypsum, 8-15 parts of straw, 6-12 parts of fly ash, 4-10 parts of attapulgite, 2-8 parts of trichoderma humic acid and 1-4 parts of modified nano zero-valent iron. The soil remediation agent disclosed by the invention has an efficient remediation effect on soil polluted by organic phosphorus and heavy metals, and the content of the organic phosphorus and the heavy metals in the polluted soilcan be efficiently reduced; according to the modified diatomite disclosed by the invention, the content of organic phosphorus and heavy metals in polluted soil can be efficiently reduced by the modified nano zero-valent iron, and the modified diatomite and the modified nano zero-valent iron have a synergistic effect on the aspect of heavy metal Cd pollution.

Description

technical field [0001] The invention relates to the technical field of soil restoration, in particular to a soil restoration agent and a preparation method thereof. Background technique [0002] Many developing countries ignore environmental protection due to one-sided pursuit of rapid economic development, and soil pollution is quite serious. China has little arable land and a large population. According to official data, not only more than 20% of the traditional arable land is seriously polluted, but more arable land is seriously degraded (China's arable land area is less than 10% of the world, but nearly 40% of the world's arable land is used. fertilizers; the amount of pesticides used has reached 1.3 million tons, which is 2.5 times the world average), threatening China's food security and harming the health of consumers. At present, soil remediation technologies mainly include physical remediation, chemical remediation and biological remediation. Physical remediation ...

AI Technical Summary

Problems solved by technology

Studies have shown that 80%-90% of the applied pesticides will eventually enter the soil environment. Pesticides are rich in organic phosphorus and heavy metals, which seriously pollute the soil, water, and damage the ecosystem.

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