قابلیت نانو ذرات آهن اکسیددرحذف یون نقره از محیط فاضلاب صنعتی مصنوعی

Background: ion silver from the internal surfaces tubes and generators inter to industrial wastewater by corrosion process. these ions have harmful effects on plants, animals and humans. iron oxide is commonly used to removal chemical contaminates. however, the used of nanoparticles in removing pollutants is more effective than the mass. in this study, using of iron oxide nanoparticles for removal silver ions from synthetic industrial wastewater was investigated and the effective parameters were optimized for the better removal.method: this study is a experimental-laboratory that iron oxide nanoparticles was synthesized by exposing nzvi into air and then ag+ removal efficiency was studied in batch system. also, the impact of the important field parameters including ph, iron oxide nanoparticles concentration, retention time, and temperature were investigated. after centrifugation and filtration, the amount of ion silver was determinate by flame atomic absorption. results: the results of this research showed that iron oxide particles were reacted with ag+ in nano scale. the maximum removal at ph=3, nano iron oxide concentration 35 g l-1 and 25°c was 99.2%.in optimum condition (ph=3, nano iron oxide concentration 10 g l-1, 5 hours reaction time and 25°c temperature) 87% of ag+ was removed. conclusion: the concentration of nano iron oxide and ph had significant effect on the ag+ removal. the results showed that ag+ removal in acidic ph controlled by absorption on surface then reduction by atomic core. while, removal in basic ph controlled by absorption. the studies showed that iron oxide nanoparticles have high ability to remove ag+ and decrease of chemical pollution of ag+ from industrial wastewater.