Ali Reza Rahmani
1, Mohammad Taghi Samadi
1, Reza Shokoohi
1, Hassan Zolghadr Nasab
2*1 Department of Environmental Health Engineering, Research Center for Health Sciences, Faculty of Health, Hamadan University of Medical Sciences, Hamadan, IR Iran
2 Department of Environmental Health Engineering, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, IR Iran
*Corresponding Author: Corresponding author: Hassan Zolghadr Nasab, Department of Environmental Health Engineering, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, IR Iran. Tel: +98-9163028450, Email:
hassanzol@ymail.com
Abstract
Since the process of heterogeneous Fenton is more complex and dynamic than the common Fenton process, control and onlinemonitoring is entirely vital for optimum operation of this system. This study was aimed to investigate the effects of pH, oxidationreductionpotential (ORP) and dissolved oxygen (DO) variations on dimethyl phthalate (DMP) removal from aqueous solutions usingthe heterogeneous Fenton process with nano zero-valent iron (nZVI). Parameters affecting the process like contact time (5 - 120minutes), pH (2 - 10), H2O2 concentration (0.01 - 1 mmol/L) nZVI content (0.01 - 0.5 g/L) and initial DMP concentration (2 - 50 mg/L)were also studied. It was found that, at optimum amounts (pH = 4, H2O2 concentration = 0.1 mmol/L, nZVI = 0.05 g/L, initial DMPconcentration = 2 mg/L, and contact time = 60 minutes), approximately 98% of the pollutant was removed. This process could treatDMP well from aqueous environments and can be introduced as a cheap and effective method.