Benzene and toluene influence with or without nitrogen dioxide on inorganic pigments of works of art—Part II

Air pollution has a great impact on the social and economic aspects all over the world. In order to account the human interaction with the atmospheric environment, a suitable scientific basis is needed. That is why six physicochemical quantities have been determined in a previous work for each one heterogeneous system between organic volatile pollutants and oxide-pigments of works of art. This investigation is extended in order to determine experimentally five new ones. Thus, a more precise contribution to the elucidation of the mechanism of the deterioration of various works of art in museums is achieved. These physicochemical quantities are: (1) local adsorption energies, (2) local monolayer capacities, (3) local adsorption isotherms, (4) density probability function, and (5) pollutant concentration on the oxide-pigment at equilibrium. All these adsorption parameters mentioned above have been calculated as a function of experimental time for the systems: C6H6/TiO2, C6H6/NO2/TiO2, C6H6/Cr2O3, C6H6/NO2/Cr2O3, C6H5CH3/TiO2, C6H5CH3/NO2/TiO2, C6H5CH3/Cr2O3, C6H5CH3/NO2/Cr2O3, C6H6/PbO, C6H6/NO2/PbO, C6H5CH3/PbO, and C6H5CH3/NO2/PbO for the first time. Thus, in this work we shall stress the recent new aspect of Reversed Flow-(Inverse) Gas Chromatography (RF-GC or RF-IGC), i.e. the time-resolved chromatography related to the evaluation of some important adsorption parameters. Gas Chromatography is a promising meeting place of surface science and atmospheric chemistry.