In　this　paper,　a　concentration　distribution　function　reconstruction　operator　is　derived　to　lift　macroscopic　parameter　concentration　to　concentration　distribution　function　in　lattice　Boltzmann　method　(LBM).　Combined　with　a　density-velocity　distribution　function　reconstruction　operator　previously　derived　by　the　author＇s　group,　the　coupled　finite　volume　method　and　LBM　scheme　(CFVLBM),　previously　proposed　by　the　authors＇　group　is　extended　to　simulate　both　fluid　flow　and　mass　transport　processes.　The　accuracy　of　concentration　distribution　function　reconstruction　operator　and　the　feasibility　of　CFVLBM　are　validated　by　two　numerical　examples,　diffusion-convection-reaction　problem　and　natural　convection　in　a　square　cavity　induced　by　concentration　gradient.　Finally,　the　CFVLBM　is　further　adopted　to　simulate　fluid　flow　and　mass　transport　in　the　gas　channel　(GC)　and　gas　diffusion　layer　(GDL)　of　a　proton　exchange　membrane　fuel　cell　(PEMFC).　It　is　found　that　the　CFVLBM　can　capture　the　pore-scale　information　of　fluid　flow　and　species　transport　in　porous　GDL　and　can　save　the　computational　resources.　(C)　2012　Elsevier　Ltd.　All　rights　reserved.