Fenton-絮凝耦合处理含Cu^(2+)和DMP的废水研究

RESEARCH ON TREATMENT OF WASTEWATER CONTAINING Cu^(2+) AND DIMETHYL PHTHALATE BY FENTON OXIDATION COUPLED WITH FLOCCULATION

采用1种新型Fenton联用工艺处理同时含有重金属Cu2+和内分泌干扰素邻苯二甲酸二甲酯(DMP)的废水。该工艺可分为2步:1)Cu2+催化作用下的Fenton(Fe2++H2O2)反应,旨在氧化DMP;2)依次加入Ca(OH)2和阴离子型聚丙烯酰胺(PAM),通过絮凝过程沉淀去除DMP和Cu2+。通过大量烧杯实验,研究了初始Cu2+浓度、H2O2浓度、n(H2O2)∶n(Fe2+)、p H、Ca(OH)2浓度和PAM浓度对反应效果的影响,并对其中的反应机制进行了一定的探讨,在Cu2+浓度为10 mg/L、H2O2浓度为499.5 mg/L、n(H2O2)∶n(Fe2+)为8∶1、Ca(OH)2浓度为600 mg/L和PAM浓度为2 mg/L时,DMP和Cu2+的去除率最高可分别达到100%和92.7%。这些研究为处理此类有机物和重金属离子共存的废水提供了新途径。

A novel combined processing method known as a Fenton-flocculation treating method was used to treat industrial wastewater containing Cu2 +and Dimethyl Phthalate( DMP). This process includes two steps: 1) Aiming to oxidize DMP by Fenton reagent under the catalysis of Cu2 +; 2) adding Ca( OH)2and negative ionic polyacrylamide( PAM) in proper order,Cu2 +and DMP were translated into precipitation by flocculation. The parameters affecting the total process,such as dosage of Cu2 +,dosage of H2O2,molar ratio of H2O2∶ Fe2 +,p H,dosage of Ca( OH)2and dosage of PAM,were determined by using a mass of jar test experiments,and the reaction mechanism was preliminarily explored in this study. The overall DMP and Cu2 +removal reached 100% and 92. 7% under the condition of 10 mg / L Cu2 +,499. 5 mg/L H2O2,n( H2O2) ∶ n( Fe2 +) = 8∶ 1,600 mg / L Ca( OH)2and 2 mg / L PAM. Thus this study might offer an effective way for wastewater treatment which contains both refractory organics and heavy metal ions.