Membrane　distillation　(MD)　offers　promise　for　recycling　shale　gas　produced　water　(SGPW),　while　membrane　fouling　is　still　a　major　obstacle　in　standalone　MD.　Herein,　sodium　percarbonate　(SPC)　oxidation　was　proposed　as　MD　pretreatment,　and　the　performance　of　the　single　MD,　SPC-MD　hybrid　process　and　Fe(II)/SPC-MD　hybrid　process　for　SGPW　treatment　were　systematically　evaluated.　Results　showed　that　compared　to　raw　SGPW,　the　application　of　SPC　and　Fe(II)/SPC　led　to　the　decrease　of　the　fluorescent　organics　by　28.54　%　and　54.52　%,　respectively.　The　hydrophobic　fraction　decreased　from　52.75　%　in　raw　SGPW　to　37.70　%　and　27.20　%　for　SPC　and　Fe(II)/SPC,　respectively,　and　the　MD　normalized　flux　increased　from　0.19　in　treating　raw　SGPW　to　0.65　and　0.81,　respectively.　The　superiority　of　SPC　oxidation　in　reducing　the　deposited　membrane　foulants　and　restoring　membrane　properties　was　further　confirmed　through　scanning　electron　microscopy　observation,　attenuated　total　reflection　fourier　transform　infrared,　water　contact　angle　and　surface　tension　analyses　of　fouled　membranes.　Correlation　analysis　revealed　that　hydrophobic/hydrophilic　matters　and　fluorescent　organics　in　SGPW　took　a　crucial　role　in　MD　fouling.　The　mechanism　of　MD　fouling　mitigation　by　Fe(II)/SPC　oxidation　was　attributed　to　the　decrease　in　concentrations　and　hydrophobicity　of　organic　by　synergistic　oxidation,　coagulation　and　adsorption.　©　2024　Elsevier　Ltd