Method for preparing efficient heavy metalion adsorbent carbon hydroxy apatite
A technology of heavy metal ions and hydroxyapatite, applied in non-metallic elements, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of slow removal process, expensive reagents or energy, low removal capacity, etc. The effect of low cost, excellent adsorption performance, and simple preparation method
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0011] Wash, dry, and crush the eggshells to below 30 meshes, add the pretreated eggshell powder to phosphoric acid at a molar mass ratio of 1:1, and control the pH value at 1.0 and the temperature at 30°C. React for 2 hours, the reaction equation is , filter to remove insoluble matter, add urea and Ca(OH) according to the molar mass ratio of 1:1 2 Powder, adjust the pH value at 9 with 1mol / L NaOH, and keep it warm at 50°C for 24 hours. The chemical reaction formula is: , the reaction product was cooled and washed with 1% NH 4 Cl washed to neutral, dried at 60°C and pulverized to obtain hydroxyapatite powder. Weigh 0.5g hydroxyapatite powder and add 200mL Cd-containing 2+ In a beaker with a concentration of 80mg / L, control pH=6 at normal temperature and pressure, stir for 2h at 350r / min, let stand for 1h, take the supernatant and measure the Cd in the solution by atomic absorption spectrophotometry 2+ concentration. heavy metal ion Cd 2+ The removal rate is 96....
Embodiment 2
[0013] Wash, dry, and crush the eggshells to below 30 meshes, add the pretreated eggshell powder to phosphoric acid at a molar mass ratio of 1:1, and control the pH value at 2.0 and the temperature at 35°C. React for 2.5 hours, the reaction equation is , filter to remove insoluble matter, add urea and Ca(OH) according to the molar mass ratio of 1:1 2 Powder, adjust the pH value to 10 with 1mol / L NaOH, and keep it warm at 55°C for 24 hours. The chemical reaction formula is: , the reaction product was cooled and washed with 1% NH 4 Cl washed to neutral, dried at 60°C and pulverized to obtain hydroxyapatite powder. Weigh 0.5g hydroxyapatite powder and add 200mL Cu-containing 2+ In a beaker with a concentration of 80mg / L, control the pH=6 at normal temperature and pressure, stir for 2h at 350r / min, let it stand for 1h, take the supernatant and measure Cu in the solution by atomic absorption spectrophotometry 2+ concentration. heavy metal ions Cu 2+ The removal rate...
Embodiment 3
[0015] Wash, dry, and crush the eggshells to below 30 meshes, add the pretreated eggshell powder to phosphoric acid at a molar mass ratio of 1:1, and control the pH value at 3.0 and the temperature at 40°C. React for 3 hours, the reaction equation is , filter to remove insoluble matter, add urea and Ca(OH) according to the molar mass ratio of 1:1 2 Powder, adjust the pH value at 12 with 1mol / L NaOH, and keep it at 60°C for 24 hours. The chemical reaction formula is: , the reaction product was cooled and washed with 1% NH 4 Cl washed to neutral, dried at 60°C and pulverized to obtain hydroxyapatite powder. Weigh 0.5g hydroxyapatite powder and add 200mL Zn-containing 2+ In a beaker with a concentration of 80mg / L, control the pH=6 at normal temperature and pressure, stir for 2h under the condition of 350r / min, let stand for 1h, take the supernatant and measure the Zn in the solution by atomic absorption spectrophotometry 2+ concentration. Heavy metal ions Zn 2+ Th...
PUM
Property | Measurement | Unit |
---|---|---|
clearance rate | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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