Soil remediation agent formula for cadmium-arsenic polluted rice planting, and preparation method thereof

Abstract

The invention discloses a soil remediation agent formula for cadmium-arsenic polluted rice planting. The soil remediation agent formula is prepared from, by weight, 25-30 parts of quicklime, 10-15 parts of an iron agent, 8-10 parts of a silicon raw material, 5-8 parts of phosphate, 10-15 parts of a natural mineral material, 6-10 parts of humic acid, 8-10 parts of acidified activated carbon, 5-8 parts of weathered lignite, 9-12 parts of sepiolite powder and 2-4 parts of chitosan. The invention further discloses a preparation method of the soil remediation agent formula for cadmium-arsenic polluted rice planting. The effective-state cadmium content and the effective-state arsenic content in rice planting cultivated land (paddy field) polluted soil are effectively reduced, so that the rice cadmium content and the rice arsenic content in rice grains are reduced; meanwhile, the effects of increasing the rice yield and improving the soil fertility are achieved; and the formula has the advantages of no secondary pollution, strong practicability and simple process, and has huge development potential in the soil combined pollution remediation application of the rice planting farmland (paddyfield).

Description

technical field [0001] The invention relates to the field of agricultural soil remediation, in particular to the formulation and preparation method of soil remediation agents for planting cadmium and arsenic polluted rice. Background technique [0002] Soil is an important part of the earth's environment. The quality of the soil environment is closely related to our life, and it is also an important part of the ecological environment. my country has a large population base and a small area of ​​arable land per capita. There is a long-term huge pressure to ensure food security, and the intensity of soil utilization is much higher than that of other countries. With the rapid development of economy and society, soil degradation problems such as acidification, salinization, element imbalance, loss and heavy metal pollution have become increasingly prominent, seriously restricting the development of land productivity. [0003] Rice is one of the main grains in my country, and pa...

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Problems solved by technology

[0004] Existing cultivated land (farmland) soil remediation agents generally have the problem that they can only repair heavy metal single-factor pollution, and there is a defect that they cannot repair heavy metal compound pollution at the same time; moreover, there is a lack of special paddy field soil remediation agents for rice planting land (paddy fields)

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