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It can suppress accumulation and absorption of the rice heavy metals, and process for the preparation of selenium-doped nanosilica sol capable of producing high selenium-containing rice
It can suppress accumulation and absorption of the rice heavy metals, and process for the preparation of selenium-doped nanosilica sol capable of producing high selenium-containing rice
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机译:它可以抑制大米中重金属的积累和吸收,以及制备能够生产高含硒大米的硒掺杂纳米二氧化硅溶胶的方法
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摘要
The present invention discloses a selenium-doped nano-silica sol capable of both inhibiting the absorption and accumulation of heavy metal in rice and producing a selenium-rich rice, and a preparation method thereof. The selenium-doped nano-silica sol of the present invention is prepared mainly by using a nano-silica sol as a carrier, sodium selenite and the like as a raw material, vitamin C and the like as a reducing agent, and polyvinylpyrrolidone and the like as an emulsifier, and doping and dispersing selenium in a specific ratio in a silica sol so as to form a selenium-doped nano-silica sol with a special structure and function. The selenium-doped nano-silica sol prepared according to the invention has high stability and high concentration, and is uniform and transparent, and has a silica content of up to 20% or more, a selenium content of up to 1% or more, and low impurity content. The selenium-doped nano-silica sol of the present invention has a pH close to neutral, wherein selenium, in a nano particle form, is dispersed in colloidal silica, with a particle size of less than 50 nm; and after the foliar application, it can significantly promote the growth of crops, inhibit the absorption and accumulation of arsenic and cadmium in crops, and increase the selenium content in crops, and has no toxic and side effects on crops, and is safe to application.
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