改性纳米铁镍去除水中2,4-DCP的研究

Study on modified F-NZVI/Ni bimetal nanoparticles for reduction of 2,4-dichlorophenol in water

采用Pluronic F-127改性纳米零价铁后负载镍,形成改性纳米铁镍(F-NZVI/Ni)。探讨了Ni的负载量、F-NZVI/Ni的投加量、2,4-DCP初始浓度、pH及反应温度对2,4-DCP去除率的影响。同时探究了F-NZVI/Ni去除2,4-DCP的最佳条件下F-NZVI/Ni去除2,4-DCP的反应过程。结果表明,F-NZVI/Ni去除2,4-DCP的能力优于NZVI,当F-NZVI/Ni投加量为3 g/L,镍负载率为5%,2,4-DCP初始浓度为20 mg/L,反应温度为35℃,初始pH值为7时,2,4-DCP的去除率为97%。F-NZVI/Ni去除2,4-DCP主要是先吸附,然后在镍催化剂作用下将2,4-DCP降解为苯酚。

The basic successfully modified NZVI by Pluronic F-127and nickel,form modified nano iron-nickel(F-NZVI/Ni).The influenlce of Ni amount,F-NIVI/Ni dosage,2,4-DCP initial concentration,pH and reaction temperature on the removal rate of 2,4-DCP were investigated.At the same time,the reaction process of removal of 2,4-DCP by F-NZVI/Ni under the optimum condition was studied.The results showed that the removal efficiency of 2,4-DCP by F-NZVI/Ni was better than that by NZVI.When the dosage of F-NZVI/Ni was 3 g/L,the nickel loading rate was 5%,the initial concentration of 2,4-DCP was 20 mg/L,the reaction temperature was 35℃and the initial pH value was 7,the removal efficiency of 2,4-DCP was 97%.The removal of 2,4-DCP by F-NZVI/Ni is mainly based on adsorption,and then 2,4-DCP is degraded to phenol by nickel catalyst.