Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method and application of calcite-otavite solid solution

A technology of calcite and solid solution, which is applied in the field of environmental protection and safety, can solve problems such as secondary pollution, and achieve the effect of easy control and low cost

Pending Publication Date: 2021-11-26
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carry out X-ray diffraction (XRD) to the prepared solid solution, test its performance in nitrogen degassed ultrapure water (use nitrogen to degas ultrapure water to dissolved oxygen below 1mg / L), air saturated ultrapure water and carbon dioxide saturated ultrapure water Under water conditions, the leaching concentration of Cd, solubility and stability are analyzed in detail, and a material with simple preparation method and stable cadmium fixation is provided to solve the problem of secondary pollution in conventional cadmium fixation methods.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of calcite-otavite solid solution
  • Preparation method and application of calcite-otavite solid solution
  • Preparation method and application of calcite-otavite solid solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature, take 500mL 0.1mol / L potassium carbonate solution in a 600mL beaker, place it on a magnetic stirrer and stir at 700rmp at 20°C, then mix 50mL 0.04mol / L calcium nitrate and 0mL 0.04mol / L cadmium nitrate mixed solution Add it into the beaker at a speed of 5mL / s, and react for 30s; then add the metal nitric acid solution of 0.8007g calcium carbonate (analytical pure) dissolved in 1.25mL of concentrated nitric acid into the beaker at a speed of 0.5mL / s, and react for 1min. The reaction is stopped, and the calcite single crystal solid solution with a molar ratio of cadmium nitrate / (calcium nitrate+cadmium nitrate) of 0.0:1.0 can be prepared by aging in the open at room temperature for 2 days. The prepared reactant was subjected to solid-liquid separation, and the solid-phase precipitate was washed three times with 50 mL of ultrapure water and once with 50 mL of absolute ethanol, and finally dried in a blast oven at 90°C for 24 hours to obtain highly crysta...

Embodiment 2

[0023] At room temperature, take 500mL 0.1mol / L potassium carbonate solution in a 600mL beaker, place it on a magnetic stirrer and stir at 700rmp at 20°C, then mix 40mL 0.04mol / L calcium nitrate and 10mL 0.04mol / L cadmium nitrate mixed solution Add it to the beaker at a speed of 5mL / s, and react for 30s; Put it into a beaker, stop the reaction after reacting for 1 minute, and age in the open for 2 days at room temperature to prepare a calcite-lingerite mixed crystal solid solution with a molar ratio of cadmium nitrate / (calcium nitrate+cadmium nitrate) of 0.2:1.0. The prepared reactant was subjected to solid-liquid separation, and the solid-phase precipitate was washed three times with 50mL ultrapure water and once with 50mL absolute ethanol, and finally dried in a blast drying oven at 90°C for 24 hours to obtain highly crystalline calcite- Rhododendron solid solution.

[0024] Leaching test: degassed ultrapure water, dissolved at 25°C for 1200h, cadmium leaching concentration...

Embodiment 3

[0028] At room temperature, take 500mL 0.1mol / L potassium carbonate solution in a 600mL beaker, place it on a magnetic stirrer and stir at 20°C 700rmp, then mix 25mL 0.04mol / L calcium nitrate and 25mL 0.04mol / L cadmium nitrate mixed solution Add in the beaker with the speed of 5mL / s, after reacting for 30s; Then the metal nitric acid solution of 0.4004g calcium carbonate (analytical pure)+0.6897g cadmium carbonate (analytical pure) dissolved with 1.25mL concentrated nitric acid is mixed with 0.5mL / s Add it into the beaker at a high speed, stop the reaction after reacting for 1 minute, and age it in the open for 2 days at room temperature to prepare a calcite-diamondite mixed crystal solid solution with a molar ratio of cadmium nitrate / (calcium nitrate+cadmium nitrate) of 0.5:1.0. The prepared reactant was subjected to solid-liquid separation, and the solid-phase precipitate was washed three times with 50mL ultrapure water and once with 50mL absolute ethanol, and finally dried i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for synthesizing a calcite-otavite mixed crystal solid solution through a precipitation method. An anhydrous potassium carbonate preparation solution is used as a base solution, then calcium nitrate and cadmium nitrate solutions with different molar ratios and a metal salpeter solution obtained by dissolving calcium carbonate and cadmium carbonate with concentrated nitric acid with a corresponding molar ratio are added into a potassium carbonate solution, and the calcite-otavite mixed crystal solid solution with high crystallinity and good stability is obtained. Finally, a proper amount of the calcite-otavite solid solution is taken, dissolving is carried out in three different solutions under the condition of 25 DEG C, and the migration, conversion and enrichment rules of cadmium in the calcite-otavite solid solution formed on the surface after the calcite adsorbs Cd < 2 + > are mastered. The calcite-otavite series solid solution synthesized by the method has the advantages that the cost is low, the control is easy, the calcite-otavite solid solution is easy to prepare instead of a mixture rich in cadmium and vaterite, and the like.

Description

technical field [0001] The invention belongs to the field of environmental protection, safety and technology, and relates to a synthesis method and application of calcite-diamondite solid solution. The method utilizes that the radius of the spacer is very similar to that of the calcium ion, and the spacer can replace the calcium ion and enter the calcite crystal to form a complete isomorphic series solid solution of calcite-horddite. Background technique [0002] Cadmium, a rare metal element, is mainly used in electroplating, nickel-cadmium batteries, coatings, etc. Cadmium is a non-essential element for the human body. It often exists in the form of compounds in nature, and its content is generally very low. Under normal environmental conditions, it will not affect human health. However, when the environment is polluted by cadmium, cadmium can be enriched in organisms and enter through the food chain. Human body causes chronic poisoning. Since the Japanese "bone pain dis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00Y02W30/82
Inventor 潘树芬杨洪渠朱义年朱宗强王星星农培杰孔琪琪王亚茹田炎章俊
Owner GUILIN UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com