The removal of Phthalate Esters (PAEs) from water was measured by using enhanced coagulation technology.Cationic coagulant poly-diallyl-dimethyl-ammonium-chloride (PDMDAAC) and polyacrylamide (CPAM) were employed to remove the dimethyl phthalate (DMP)

and the residual concentration of DMP is determined by the high performance liquid chromatography (HPLC).During the coagulation/flocculation process

parameters such as coagulant dosage

pH value

and sedimentation time are investigated.The results show the use of coagulant PDMDAAC/CPAM together has better coagulation effect than PDMDAAC.DMP removal rate is 99.87% when initial DMP concentration is 0.50 mg/L

the addition of a PDMDAAC dosage 50 mg/L

the addition of a CPAM dosage 2.5 mg/L

pH value 6.0 and sedimentation time 3 hours.Therefore

the removal of PAEs by coagulation is effective

and the application of coagulation by PDMDAAC/CPAM in water supply will enhance the removal of PAEs and at the same time reduce the water turbidity.