Phosphate　removal　to　a　hydrothermally　modified　fumed　silica　and　pulverized　oyster　shell　material　for　use　in　wastewater　treatments　were　made.　Sorption　data　modeling　(pH＇s　3-11,　P　concentrations　of　3,　5,　10,　15,　20,　&　25　mg/L,　and　at　an　ambient　temperature　of　23°C)　indicate　that　an　optimal　removal　of　P　occurs　at　pH　11.　Three　kinetic　models　were　also　applied　(a　pseudo-first-order　Lagergren　kinetic　model,　a　pseudo-second-order　(PSO)　kinetic　and　Elovich)　and　indicate　that　a　PSO　model　best　describes　P-removal.　In　addition,　an　application　of　the　Weber　and　Morris　intra-particle　diffusion　model　indicates　that　external　mass　transfer　and　intra-particle　diffusion　were　both　involved　in　the　rate-determining　step.　Langmuir,　Freundlich　modeling　of　the　sorption　data　also　indicate　that　the　heterogeneous　Freundlich　sorption　site　model　best　describes　the　data　although　Langmuir　data　also　fit　with　data　tailing　suggesting　data　are　not　linear.　The　data　collected　indicates　that　the　hydrothermally　modified　fumed　silica　and　pulverized　oyster　shell　material　is　suitable　for　use　in　wastewater　treatment,　with　P-removal　to　the　solids　being　preferential　and　spontaneous.　©　2013　Chen　et　al.