Effects of engineered nano-titanium dioxide on pore surface properties and phosphorus adsorption of sediment: Its environmental implications

► The attachment of Enano-TiO2 to surface enhanced markedly sediment BET surface area and t-Plot external surface area. ► The fill of Enano-TiO2 into the micropores reduced significantly the sediment t-Plot micropore surface area. ► Enano-TiO2 could increase sediment phosphorus (P) adsorption maximum and decrease in sediment P binding energy. ► P would be easily released because of the decreasing P binding energy of the sediment with elevated Enano-TiO2.