Transport　of　Cu2+　through　supported　liquid　membrane　(SLM)　using　Celgard　2500　as　support　and　LIX984　dissolved　in　kerosene　as　carrier　was　studied.　Based　on　double　membrane　theory,　a　transport　rate　model　was　used　to　describe　the　transport　process　under　steady　state.　When　the　acid　concentration　in　stripping　solution　was　over　2　mol/L,　the　mass　transfer　resistance　of　stripping　side　could　be　neglected.　The　variation　of　separated　mass　transfer　coefficient,　km,　in　the　membrane　could　be　used　to　describe　the　degradation　of　SLM.　During　the　process　of　mass　transfer,　km　increased　at　the　beginning　and　then　decreased　gradually.　Moreover,　the　carrier　was　more　inclined　to　lose　than　the　kerosene　diluent.　The　influences　of　operation　conditions　on　the　mass　transfer　and　membrane　liquid　loss　were　also　investigated.　The　results　showed　that　the　initial　mass　transfer　flux　J0　increased　with　the　increase　of　initial　concentrations　of　carrier　and　Cu2+,　and　initial　pH　value　in　feed　solution.　The　loss　of　membrane　liquid　increased　with　the　increase　of　carrier　concentration　in　membrane　liquid　and　the　decrease　of　copper　concentration　in　feed　solution.　However,　the　pH　value　had　little　influence　on　the　loss　of　membrane　liquid.