Mineral　scaling　caused　by　multivalent　metal　ions　can　significantly　hinder　the　long-term　operation　of　nanofiltration　membranes.　In　this　study,　in-situ　interfacial　polymerization　including　a　posttreatment　by　using　a　citric　acid　solution　was　employed　in　order　to　mitigate　scaling　on　the　membrane　surface.　Under　the　optimal　conditions　(15　​min　of　posttreatment　with　a　2　​M　citric　acid　solution),　the　membrane　water　permeance　increased　from　5.76　​±　​0.2　to　15.1　​±　​1.8　​L⋅m−2⋅h−1·bar−1　for　the　pristine　and　the　optimal　membrane,　respectively.　The　molecular　weight　cut-off　of　the　optimal　membrane　was　399　​Da,　which　allows　for　the　removal　of　organic　micropollutants　in　groundwater.　Furthermore,　the　resulting　membrane　showed　a　Na2SO4　and　CaCl2　rejection　of　92.5　​±　​1.9　and　11.4　​±　​1.3%,　respectively.　During　the　anti-scaling　tests,　the　membrane　fabricated　with　this　strategy　exhibited　a　minor　decline　of　the　water　permeance　of　33.5%　when　subjected　to　the　same　water　recovery　process,　opposed　to　65.8%　for　the　pristine　membrane.　This　proposed　fabricating　procedure　thus　provides　an　effective　strategy　for　retarding　membrane　scaling　in　desalination　applications.　©　2024　The　Authors