混凝法去除水体中邻苯二甲酸二甲酯

研究采用强化混凝法去除水体中特征性有机污染物邻苯二甲酸酯类化合物（PAEs）。以邻苯二甲酸二甲酯（DMP）为目标物，阳离子混凝剂聚二甲基二烯丙基氯化铵（PDMDAAC）与聚丙烯酰胺（CPAM）为混凝剂，对含DMP的水体进行强化混凝处理，混凝处理后水体中DMP的残余浓度采用高效液相色谱法（HPLC）测定。研究内容还包括混凝剂的投加量、pH值、静置时间对去除效果的影响，试验获得了较好的研究结果。研究结果表明PDMDAAC与CPAM复合使用后的去除效果优于单一混凝剂PDMDAAC的去除效果，当水体中DMP浓度为0．50mg／L，PDMDAAC与CPAM投加量分别为50mg／L与2．5mg／L，pH为6．0及沉降时间3h时，DMP最大去除率可达99．87％。采用混凝法去除水体中PAEs操作简便，如将该方法用于实际供水中有利于将水体中的PAEs与浊度同时去除。

Removal of Dmethyl Phthalate from Water with Enhanced Coagulation Technology

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.