Effect of hydrophobicity of humic substances on electro-ultrafiltration

► Hydrophilic fraction (HPIF) caused more severe fouling than hydrophobic fraction (HPOF) during ultrafiltration. ► HPOF had a lower flux reduction than HPIF due to high electrophoretic mobility of HPOF. ► Electrophoretic mobility of humic substances forecasted the performance of electro-ultrafiltration.