Method for preparing coconut shell activated carbon with silver controlled-release sterilizing function through hydrothermal reaction

Abstract

A method for preparing coconut shell activated carbon with a silver controlled-release sterilizing function through hydrothermal reaction is characterized in that: using coconut shell activated carbon as a raw material and silver nitrate as an impregnating liquid, preparing silver-carried activated carbon through hydrothermal reaction, and forging at a high temperature under nitrogen protecting conditions to obtain the product. The operating technology has the main characteristics that the coconut shell activated carbon is used as the raw material, the absorption capacity is high, the speed is high, and the product is durable and regenerative; silver is more effectively loaded on the activated carbon through hydrothermal reaction preparation, and high specific surface area (1000m<2>/g) and high antibacterial activity (the sterilizing time of 107/mL is 35 minutes) are obtained; high-temperature forging is favorable to the reactivation of the silver-carried activated carbon, silver granules are more uniformly distributed on the surface of the activated carbon, and a silver controlled-release function is realized.

Description

Technical field: [0001] The invention relates to the field of biomass carbon materials, in particular to a method for preparing coconut shell activated carbon with silver slow-release and bactericidal function by hydrothermal reaction. Background technique: [0002] Due to the increasingly serious water pollution, the deep purification of drinking water has attracted widespread attention. Activated carbon adsorption technology is one of the most mature and effective methods to improve the conventional treatment process and remove trace organic matter in water. Activated carbon for deep purification of drinking water at home and abroad is usually mainly loaded with silver, and it is of great significance to realize the high antibacterial activity and slow release of silver of silver-loaded activated carbon. [0003] There are many ways to prepare silver-loaded activated carbon. The impregnation method is to wash the activated carbon and immerse it in a silver-containing solu...

AI Technical Summary

Problems solved by technology

This method is complicated to operate, introduces more harmful chemical reagents, and pollutes the environment

[0010] To sum up, activated carbon adsorption technology is currently one of the most mature and effective methods for treating water pollution. The conventional treatment process is usually based on silver loading, mainly including impregnation method, doping method, electrochemical deposition method and reduction method, etc. The impregnation method and the doping method take a long time to operate and cause serious environmental pollution. The cost of the electrochemical deposition method and the reduction method is high, the operation is complicated, the production scale is small, and it has adverse effects on the environment.