Adsorption of carbon monoxide by samples of soils and peat-sand mixtures

摘要

The adsorption of carbon monoxide (CO) by loose samples of natural soils and artificial organomineral mixtures depending on the water content was studied in laboratory experiments. The highest adsorption of CO was found for the samples of 100% organic soil modifier and its 80% mixture with sand (200 A mu g of CO/kg per hour and more). The lowest CO adsorption (10-15 A mu g of CO/kg per hour) was observed for an Arenosol. The addition of 5 wt % of the modifier to the desert sand increased the adsorption of CO to 50-55 A mu g of CO/kg per hour, as was typical for the chernozem and soddy-podzolic soil. The adsorption of CO as depending on the water content in the samples was a unimodal function, and the adsorption levels corresponded to the optimum soil water content (about 0.4-0.6 of the maximum water capacity). On the basis of the results, the Arid Grow soil modifier was recommended as a highly efficient agent for the regulation of the gas function of soils in urban areas subjected to increased CO emissions from vehicles and industrial enterprises.