A comparative study on aggregation/sedimentation of TiO2 nanoparticles in mono- and binary systems of fulvic acids and Fe(III)

► The behavior of TiO2 nanoparticles was studied in mono- and binary system of Fe(III) and SRFA. ► TiO2 nanoparticles were stabilized by Fe(III) at pH 4, while destabilized at pH 6 and 8. ► SRFA reduced the effect of Fe(III) due to the formation of COO-Fe(III) complex.