Izvestiya of Saratov University.
Chemistry. Biology. Ecology
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)

toluene

A Comparative Study of Benzene and Toluene Adsorption on KOH-Modified AR-A Activated Carbon: Effect of Concentration and Impregnation Ratio

This study compares the adsorption of benzene and toluene vapors on potassium hydroxide (KOH)-modified AR-A activated carbon (AC), considering their toxicological impact. The primary objective was to evaluate how different KOH concentrations and impregnation ratios influence the adsorption capacity and kinetics for these volatile organic compounds (VOCs). The AC samples were chemically modified using KOH at concentrations of 0.5 M and 1.0 M, using mass-to-volume impregnation ratios of 1:5 and 1:10.

Phase Diagrams of the Ternary Systems Potassium Carbonate + Water + Hydrocarbon at 25°С

The phase diagrams of the ternary systems potassium carbo- nate+water+hydrocarbon (toluene, n.dodecane) at 25°С were first studied by means of the methods of sections and isothermal titration. The phase diagrams of both systems belong to those of ternary systems with salting-out of the binary heterogeneous system. Potassium carbon- ate sesquihydrate is the solid phase of monotectic equilibrium. Nine tie lines were drawn on the delamination field of the phase diagram of each ternary system.