Studies Of Treatment Of Pollutants In Oilfield Wastewater By Advanced Oxidation Techniques

By reviewing the literature and studying characteristics of oilfield wastewater, we get an idea that the removal of oil and PAM is a key for disposal of the oilfield wastewater. In the paper, we used ferrate salts and Fenton reagents as advanced oxidants for oxidation degradation and viscosity-breaking of petroleum hydrocarbon and PAM in oilfield wastewaters. Adopting simulating solar light sources, effects of ferrate, Fe2+- H2O2 concentrations. pH. temperature and time on oxidation were investigated.The results show that the ferrates and Fenton reagents have a high oxidative activity, degradation and visco-breaking properties marks an action to the oilfield wastewater, and ferrate is a special and efficient treatment reagent of wastewater. In room temperature, we added suitable ferrate and Fenton reagent to wastewater containing PAM. The degradable rate of PAM can reach 90% or up and the viscosity is lowed to viscosity of distilled water by reaction of 3 to 5 minutes. Therefore, treatment of PAM in oilfield wastewater by he advanced oxidation processes is potential technology. Using oxidation treatment of ferrates and Fenton reagents, the concentration of hydrocarbons in oilfield wastewater is lower than one regulated in national standards.