Starch-base material capable of achieving fertilizer slow release and enriching radionuclide and preparation method of material

Abstract

The invention discloses a starch-base material capable of achieving fertilizer slow release and enriching radionuclide and a preparation method of the material. The method comprises the steps of weighing, by weight 1-99 parts of starch, 1-99 parts of a fertilizer, 0-50 parts of plasticizer and 0-50 parts of fortifier and mixing and stirring for 5-20 min to obtain a mixed material; and adding the mixed material into a twin screw extruder, conducting melt blending for 5-10min under the condition that the temperature is 80-180 DEG C and the pressure is 0.1-1 MPa, extruding, molding, and pelleting after cooling to obtain the starch-base material capable of achieving fertilizer slow release and enriching radionuclide. According to the starch-base material, good mechanical performances are achieved, the slow release speed can be controlled, when the fertilizer is subjected to slow release, the radionuclide can be enriched, and the material can be widely applied to fertilizer slow release and purification of heavy metal in water and organisms which are polluted by the radionuclide.

Description

technical field [0001] The invention belongs to the utilization of biomass resources and new biomass-based materials, and relates to a starch-based material and its preparation, in particular to a starch-based material with fertilizer slow release and radionuclide enrichment and a preparation method thereof. The starch-based material of the invention is suitable for slow release of fertilizers, purification of heavy metals and radioactive nuclide pollution in soil and water, and ecological restoration systems, and has broad market prospects. Background technique [0002] Rapid economic development relies more and more on energy, and fossil resources such as petroleum and coal are becoming increasingly depleted, and vigorous development of nuclear energy has become an inevitable requirement for economic development. With the use of nuclear energy, nuclear pollution, especially radioactive wastewater pollution, will continue to increase, and the purification of nuclear-contami...

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Problems solved by technology

In the prior art, there are few research reports on this kind of biomass slow-release fertilizer materials, especially suitable for aquatic plant growth, radionuclide enrichment and purification, and slow-controlled release of fertilizers. Biomass materials have not been reported. Therefore, fertilizer collection The research and development of biomass matrix materials with integrated slow release and nuclide enrichment and purification functions is of great significance to the purification and ecological restoration of nuclear and heavy metal contaminated soil and water systems

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