Mass transfer of trichloroethylene through the palladized iron coated reactive geomembrane

► Palladized iron coated reactive geomembrane mitigated the mass transfer of trichloroethylene through geomembrane effectively. ► The effect of Pd/Fe coating on mass transfer parameters of geomembrane was not significant. ► The reactivity of Pd/Fe RGM had a linear correlation with Pd/Fe loading rate. ► The reactivity of Pd/Fe RGM was smaller than that of powder by a factor of one hundred. ► The reactivity of Pd/Fe RGM decreased severely by sulfide ion and long-term aging.