جستجوی مقالات مرتبط با کلیدواژه « Peroxydisulfate » در نشریات گروه « شیمی »

The present research involves effectual parameters on Cefixime trihydrate removal from aqueous solutions. Antibiotics are the main contributions in pharmaceutical waste; their presence causes major concern. The extensive utilization of antibiotics in aquaculture and prescriptions has led to the cultivation of various antibiotic-resistant bacteria and genes in wastewater. The UV-LED/ S2O8 2- process, one of the most widely (AOPs), is an effective method for industrial wastewater treatment. Sixteen experiments were required to study the effect of parameters on UV LED/ S2O8 2- removal of the drug. Each experiment was repeated three times )n=48) to calculate the mean of average. Outcomes revealed that among different parameters, peroxydisulfate concentration was the most efficient one. Based on the mean of average, optimized condition for drug removal was temperature of 50◦C, current intensity of 1800 mA, drug concentration of 10 ppm, peroxydisulfate concentration of 120 mM and 30 min for time. Consequently, 91.79 percent of drug degradation was achieved via optimum conditions.

The photo-oxidative decolorization of Direct Red 23 (DR23), a textile dye which is suspected to be carcinogenic was investigated using peroxydisulfate activated by UV irradiation and heat in a batch photo-reactor at experimental conditions. A very simple analytical method, direct UV–vis spectrophotometric detection, was utilized for the progress of photo-oxidative decolorization of dye in aqueous medium. The effect of operational parameters namely initial peroxydisulfate concentration, pH and temperature of reaction, additional photo-catalyst on the decolorization rate was truly investigated. The results showed that use of UV/S2O8 2- system was a highly effective way to remove colored components from contaminated waters. Optimum conditions for maximum degradation was acidic pH (pH=2), temperature of 50°C with 7.5 mM of peroxydisulfate. Also, it was observed that dye degradation was enhanced using nano-TiO2 glass beads as photo-catalyst and peroxydisulfate consumption was significantly reduced to achieve the same percentages of dye degradation which was observed in UV/S2O8 2- system at the same conditions.