Abstract: Heterogeneous interaction between carbon disulphide and atmospheric particles was investigated by means of FTIR, XPS, TG-DTG-DTAand in situ XRDanalysis. COSand orthorhombic α-S₈ were the main products at ambient temperature. And SO₄^2- was identified on the surface of atmospheric due to the further oxidation of sulfur species. Based on the static-state FTIRstudy and the analysis of sulphur species on the surface of atmospheric particles by XPS, a model of mechanism on heterogeneous interaction between the surface of atmospheric particles and CS₂ was given. The reaction is confirmed to be a pseudo-secondary one when O₂ is overloaded. The apparent rate constant is 6.98×10^-22 cm³·mol^-1·s^-1 at 296 K, and apparent activation energy is 34.6 kJ/mol. In an industrial zone with CS₂ exhaust emission standard of 10 mg/m³(GB 3095), the CS₂ wastage of the heterogeneous interaction is 41% of that of the reaction between CS₂ and OH^·, which confirms the significance of the heterogeneous interaction in developing countries.

Key words: Atmospheric particles, Carbon disulphide, Carbonyl sulphide, Heterogeneous interaction