Ali Reza Rahmani; Amir Shabanlo; Somaye Akbari; Hadi Rezaeivahidian; Monire Tarlani; Zahra Daraee; Halime Almasi
Volume 25, Issue 1 , May and June 2018, , Pages 21-29
Abstract
Abstract Backgrond: Pharmaceutical products, particularly antibiotics such pollutants are evolving due to the cumulative effects, adverse effects and drug resistance is a major concern in the control environment. The purpose of this work is to investigate the feasibility and potential of iron ...
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Abstract Backgrond: Pharmaceutical products, particularly antibiotics such pollutants are evolving due to the cumulative effects, adverse effects and drug resistance is a major concern in the control environment. The purpose of this work is to investigate the feasibility and potential of iron nanoparticles in the aqueous solution being removed antibiotics. Materials and Methods: In this study, the performance activated persulfate with zero-valent Zinc nanoparticles in the presence of ultrasound in the analysis of antibiotics was investigated. The effect of process parameters such as pH of the solution (2.97-10.53), concentration Potassium persulfate (194.33-1200mg/l) and the zero-valent zinc (12.73-147.27mg/l) in reaction time 0-180 min using a batch chamber ultrasonic were studied. A statistical procedure was used to optimize the parameters of the RSM model. Antibiotics are measured based on COD vials and DR-5000 spectrophotometer was used. Results: The results showed that the initial pH of the solution is the most important influential parameters. The addition of potassium persulfate and zero valent zinc in the samples was enhanced performance. Optimum efficiency achieved in 50 mg/l concentration antibiotics, potassium persulfate 1200 mg/l, the zero- zinc 120 mg /l, pH 4.5. Conclusion: The results of this study demonstrate acceptable performance persulfate activated process with zero-valent iron and zinc nanoparticles on ultrasound in the presence of antibiotic.
Somayyeh Akberi; Abdolmotalleb Seyyed Mohammadi; Javad Fardmal; Qorban Asgari
Volume 22, Issue 5 , November and December 2015, , Pages 870-878
Abstract
Background: Phenol is one of the toxic saline wastewater pollutants that is considered as priority pollutants since it is necessary treatment and reached the phenol concentration to the level of effluent discharge standard before discharge into the environment. In this study the performance of electro-Fenton ...
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Background: Phenol is one of the toxic saline wastewater pollutants that is considered as priority pollutants since it is necessary treatment and reached the phenol concentration to the level of effluent discharge standard before discharge into the environment. In this study the performance of electro-Fenton process in phenolic saline waste water treatment and the removal degree of COD were investigated. Materials and Methods: In this experimental study a reactor (1 litre) which was equipped to four iron electrodes and a DC power supply used to remove phenol and COD. The effect of operating parameters such as phenol initial concentration, H2O2 dosage, electrolyte concentration, pH, current density, connection time and type of electrode connection were investigated. Results: The results showed that this process using iron electrodes with parallel monopole connections is able to leave out the phenol from saline waste water by 96% and the removal COD equals 59% in operating conditions: pH= 3, initial phenol concentration=500mg/l, H2O2 concentration = 150 mg/L, Hydrogen peroxide at a current density = 15 mA/cm2at 10 minutes. Conclusion: The results showed that electrochemical processes can be considered as a better suitable substitute rather than other methods due to saline content and high electrical conductivity in saline wastewater.