A kind of passivator for inhibiting the absorption of rice and reducing the content of heavy metals in rice and its application and using method

Abstract

The application relates to the field of environmental chemistry, and specifically discloses a passivator for inhibiting rice absorption and reducing heavy metal content in rice, and its application and usage method. The passivating agent is made by mixing the following raw materials by weight: 10-20 parts of phosphate; 5-10 parts of inorganic alkaline substance; 5-10 parts of calcium polysulfide; 10-20 parts of silicon fertilizer; 20 parts; 15-25 parts of iron oxide; 10-20 parts of manganese oxide; the passivator is used in paddy fields containing heavy metals, and the heavy metals are one or more combinations of lead, cadmium, arsenic, mercury, and chromium The method of using the passivating agent comprises the following steps: S1, cultivating the paddy field, and spreading the passivating agent at the same time; S2, soaking in water. The passivating agent of the present application has the advantages of inhibiting the absorption of heavy metals by rice and reducing the content of heavy metals in rice.

Description

technical field [0001] The application relates to the field of environmental chemistry, more specifically, it relates to a passivator for inhibiting the absorption of rice and reducing the content of heavy metals in rice, and its application and usage method. Background technique [0002] Rice is one of the main food crops in the world, and more than half of the world's population depends on rice as a staple food. During the growth of rice, it is necessary to extract nutrients from the paddy field. [0003] However, due to the deteriorating soil heavy metal pollution, heavy metals such as lead, cadmium, arsenic, mercury, and chromium contained in the polluted rice fields have strong chemical activity and bioavailability, which not only affect the yield of rice, but are also easily absorbed by rice. Residues in rice will endanger human life and health through the food chain, and bring major hidden dangers and threats to people's lives. Contents of the invention [0004] I...

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Problems solved by technology

[0003] However, due to the deteriorating soil heavy metal pollution, heavy metals such as lead, cadmium, arsenic, mercury, and chromium contained in the polluted rice fields have strong chemical activity and bioavailability, which not only affect the yield of rice, but are also easily absorbed by rice. Residues in rice, endangering human life and health through the food chain, and bringing major hidden dangers and threats to people's lives

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