一种改善低温吸附性的莲蓬壳基活性炭的制备方法
Lotus seedpod shell-based activated carbon was prepared by using a specific ratio of impregnation solution and freeze-drying process. This solved the problem of poor adsorption performance of activated carbon at low temperatures, and achieved the synergistic construction of high specific surface area and stable active sites, thereby improving the adsorption efficiency of cadmium heavy metal ions at low temperatures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FUJIAN XINSEN CARBON
- Filing Date
- 2025-12-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lotus seedpod shell activated carbon has poor adsorption performance for heavy metal cadmium at low temperatures, making it unsuitable for low-temperature wastewater treatment. Furthermore, the use of traditional activators leads to easy aggregation of active sites and temperature sensitivity.
A mixed aqueous solution of phosphoric acid, nickel-bipyridine complex salt and nonionic surfactant in a specific ratio is used as the impregnation solution. Combined with freeze drying and carbonization processes, activated carbon with high specific surface area and rich porosity is formed. The active sites are stabilized by coordination anchoring of nickel nanoparticles and sulfur and nitrogen co-doping to avoid migration and agglomeration.
Lotus seedpod shell-based activated carbon was prepared, which has a high adsorption capacity for cadmium heavy metal ions in water at low temperatures (≤15℃). It exhibits excellent adsorption performance and is suitable for the remediation of heavy metal pollution in low-temperature environments.
Smart Images
Figure CN121553940B_ABST