In　this　work　the　lattice　Boltzmann　method　(LBM)　is　used　to　investigate　semi-volatile　organic　compounds　(SVOCs)　mass　transfer　under　the　influence　of　particle　sedimentation　in　the　boundary-layer　scale　region.　For　the　fluid-particle　interaction,　the　direct-forcing　immersed　boundary　(IB)　method　is　applied　to　calculate　the　hydro-dynamic　force.　A　mass-transfer　IB　method　is　employed　to　calculate　the　fluid-particle　SVOC　flux.　Particles　with　zero　and　saturated　initial-concentrations　are　studied　to　investigate　the　effects　of　clean　and　polluted　particles.　Effects　of　fluid/particle　equilibrium　coefficients,　as　well　as　particle　diameters,　are　discussed.　Wall　adsorptions　under　the　influence　of　multiple　particles　are　also　investigated.　Numerical　simulations　reveal　that　a　particle　always　intensifies　wall　adsorption　independent　of　its　initial　SVOC　concentration.　The　influences　of　particles　on　wall　adsorption　are　associated　with　disturbance　effect　(disturbing　air　due　to　particle　moving)　and　medium　effect　(SVOC　mass　transfer　between　particles　and　their　surrounding　air).　Disturbance　effect　of　clean　particles　overwhelms　their　medium　effect　while　medium　effect　is　dominant　for　saturated　particles.　Disturbance　effect　and　medium　effect　both　increase　with　particle　diameter,　and　medium　effect　is　more　sensitive　to　particle　diameter.　Competitive　adsorption　occurs　in　presence　of　a　number　of　particles　and　has　an　indirect　impact　on　wall　adsorption.　©　2020　Elsevier　Ltd