Characterization of activated carbon cloth impregnated with metalorganic compounds

摘要

This paper reviews the preparation of activated carbon cloth (ACC) with metalorganic compounds, in the aim of studying the effect of each activation component (cationic and anionic parts of metalogranic salts), as well as the characteristics of the resulting cloth. Activated carbon cloth was selected as the starting material which was then impregnated with cupric and silver acetates, oxalates, tartrates, stearates and citrates, respectively, for the purpose of improving the total sorptive capacity. The application of two methods of analysis - atomic absorption flame spectrometry (AAS) and energy-dispresive spectrometry (EDS) -revealed that all the salts were adsorbed at the cloth surface, but with different constants of metallic and organic parts. It was concluded that silver ion is essential for the enhancement of impregnation, and that the impregnation affinity decreases from acetate to citrate, which can be ascribed to the increase in molecular size of the impregnant. Both analytical methods were proved useful techniques for the characterization of non-impregnated and impregnated carbon cloth. The optimum procedure for the determination of each active component of the activated carbon cloth is developed and described in this paper. Anion contents were determined by ion chromatography. Sorptive properties of ACC were examined for hydrogen cyannide by standard gravimetric procedure.