Tibet snow lotus adsorbent and application thereof for rare earth ion absorption

Abstract

The invention discloses a Tibet snow lotus adsorbent and an application thereof. A preparation method for the Tibet snow lotus adsorbent is as follows: snow lotus flower bodies are washed with deionized water for 3 to 4 times to remove dust and mud on the surfaces of the snow lotus flower bodies; the cleaned materials are respectively soaked in 1 mole of HNO3 (nitric acid), 0.1 to 4 moles of NaOH (sodium hydroxide), 1 mole of H3PO4 (phosphoric acid), 10 percent methanal, 40 percent (volume per volume) ethyl alcohol, and 10 percent H2O2 (hydrogen peroxide) at a constant solid-to-liquid ratio of 20 grams per liter for 24 hours, so as to obtain the snow lotuses treated with the different treating agents; the treating agents on the surfaces are washed away repeatedly with deionized water until the pH value is neutral; after drying and fragmentation treatment, the cleaned materials are sieved through a 40 to 100 mesh sieve, and stored in sealing bags to prevent dampening. The absorbent prepared through the method achieves higher rare earth ion absorption effect, and particularly, the absorbent after alkali treatment achieves a larger rare earth ion absorption capacity; the materials after absorption can be recycled through HNO3; the preparation method provided the invention is easy to operate and has low cost; the absorbent is self-degradable, and is a natural and green absorbent.

Description

technical field [0001] The invention relates to a Tibet snow lotus adsorbent and its use for adsorbing rare earth ions, belonging to the field of rare earth utilization. Background technique [0002] my country is a world-recognized country rich in rare earth resources. At present, the proven reserves account for more than 80% of the world's total rare earths, and more than 95% of the world's rare earths are provided by China. Due to their unique physical and chemical properties, rare earth elements have received extensive attention in the fields of chemical engineering, metal smelting, nuclear energy, optics, magnetism, luminescent and laser materials, and high-temperature superconducting materials. With the extensive use of rare earth micro-fertilizers and rare earths as feed additives, it is inevitable to enter the food chain through various channels. The toxicity of rare earths has not yet been studied. Up to now, it has not been proved that rare earths are essential ele...

AI Technical Summary

Problems solved by technology

According to the literature survey, up to the current research at home and abroad, the use of snow lotus to adsorb rare earth ions has not been reported.

Images