Method for reducing accumulated nanometer ceric oxide in rice seedlings

Abstract

The invention belongs to the technical field of environmental analysis, and discloses a method for reducing accumulated nanometer ceric oxide in rice seedlings. According to the method, divalent ironions are added into an external source to generate ferric oxide coatings on root surfaces of rice through induction to stop the nanometer ceric oxide from accumulation in the rice. The physiology feature that the rice forms the root surface ferric oxide coatings in a rich-iron environment is used, along with forming of the ferric oxide coating, absorbing and accumulation of the nanometer ceric oxide on the root surfaces and root interiors of the rice and overground tissue parts are repelled, a scientific and effective stopping and controlling technology is provided when pollution of the nanometer ceric oxide in actual agricultural production in the future, and the risks caused by exposing of the nanometer ceric oxide to human health are reduced. The stopping and controlling effect of rootsurface ferric oxide coatings on large-grain size nanometer ceric oxide is better than that on small-grain size nanometer ceric oxide. The effect that the divalent iron is added into the external source to form the root surface ferric oxide coatings through induction, and accordingly absorbing and accumulating of nanometer ceric oxide are stopped and controlled is also verified in soil culture experiments.

Description

technical field [0001] The invention belongs to the technical field of environmental analysis, and in particular relates to a method for reducing the absorption and accumulation of nanometer ceria in rice seedlings. Background technique [0002] At present, the existing technology commonly used in the industry is this: nano ceria (CeO 2 ) has been widely used in production practice, including polishing materials, glass additives, diesel catalysts, personal care products in daily life, and solid-state fuel cells in the automotive industry, etc. With its wide application, most nano ceria will eventually be discharged as waste, resulting in the pollution of nano ceria in environmental media. Since plants are the basis of the entire food chain, especially the nanomaterials accumulated in crops will not only affect their own growth, but also pose a threat to the environment and human health through the food chain. When nanomaterials are released into the environment, nanocerium...

AI Technical Summary

Problems solved by technology

[0005] In view of the lack of effective control of the accumulation of nano-cerium dioxide in crops and rice in the prior art, the present invention provides a method for reducing the accumulation of nano-cerium dioxide in rice seedlings

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