Polyacrylamide/silica（PAM/SiO2）compositecapsulesweresynthesizedbyinversePickeringemulsionpolymerization.Silicananoparticlesmodifiedwithmethacryloxypropyltrimethoxysilane（MPS）wereusedasastabilizer.Transmissionelectronmicroscopy（TEM）,scanningelectronmicroscopy（SEM）,Fouriertransforminfrared（FT1R）spectroscopy,andthermalgravimetricanalysis（TGA）wereusedtocharacterizethemorphologyandcompositionofthecompositecapsules.SEMandTEMimagesshowedthatcapsulesconsistedofaparticleshellandapolymerinnerlayer.Thecapsulesizedependsonthenanoparticleconcentrationinthecontinuousphase.Thecompositerigiditylargelydependsontheacrylamideconcentration.FTIRandTGAresultsindicatedtheexistenceofpolyacrylamideandSiO2inthecompositeparticles.AqueousHg（Ⅱ）removaltestingbythePAM/SiO2compositecapsulesindicatedpromisingpotentialforremovingheavymetalionsfromwastewater.
