摘要：The interaction of elemental mercury with ice surfaces based on the migration behaviour at
sub-ppt concentrations in a packed bed flow tube is discussed. Analysis shows that elemental
mercury interacts only weakly with ice surfaces and suggests an adsorption enthalpy of
−28 ± 2 kJ mol−1. The experiments further reveal an adsorption equilibrium constant, which quantifies the
partitioning of elemental mercury between the surface and the gas phase, with a value of 12 cm at
140 K. Extrapolation to environmental conditions gives a range for the equilibrium constant of
3 × 10−4 to
4 × 10−3 cm at 230 K.
