DESCRIPTION OF AIR/SURFACE PARTITIONING FOR VOLATILE ORGANIC POLLUTANTS IN ANTARCTIC ENVIRONMENT

摘要

Linear relationships including molecular deformation polarizability and acid-base hydrogen bonding parameters of Abraham's scale are proposed to connect the adsorption thermodynamic functions (adsorption enthalpy, entropy, free energy, or related to later value, the logarithms of gas-particle partition coefficient or gas chromatographic specific retention volume) with contributions of nonspecific and specific interactions between volatile organic compounds (VOCs) and adsorption sites of different natural solid and liquid surfaces. The model sufficiently describes adsorption thermodynamics of VOCs on surface of various carbonaceous materials, minerals, inorganic oxides, water, air/water interface, wet soils and plants. The coefficients of the model show high dependence of adsorption characteristics on the surface chemistry. Relations between the models' coefficients and the surface characteristics determined by inverse gas chromatography (dispersive component of surface free energy, donor and acceptor numbers of solid surface) are derived. This approach was employed to predict high enrichment factors for different VOCs identified in samples of young ice from Western coastal Antarctica.