Ghorban Asgari
1, Javad Faradmal
2, Hassan Zolghadr Nasab
3, Abdolmotaleb Seidmohammadi
1*1 Social Determinants of Health Research Center (SDHRC), Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, IR Iran
2 Department of Biostatistics and Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, IR Iran
3 Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, IR Iran
Abstract
Catalytic ozonation is a new and promising process used to remove the contaminants from drinking water and wastewater. This study
aimed to evaluate the catalytic potential of nano-magnesium oxide (nano-MgO) for the removal of humic acids (HA) from water. Mg
(NO3)
2 solution was used to prepare MgO powder by the calcination method. In a semi-batch reactor, the catalytic ozonation was carried
out. The effects of the various operating parameters, including pH, reaction time, T-butyl alcohol (TBA) and phosphate on HA degradation
were evaluated. Experimental results indicated that degradation of HA was increased as the pH solution and reaction time were increased.
Maximum HA degradation was obtained at pH = 10 and the reaction time of 10 minutes in the catalytic process. The calculated catalytic
potential of nano-MgO on ozonation of HA was 60%. Moreover, catalytic ozonation process was not affected by TBA and the main reaction
on HA degradation HA have effect take place on MgO surface. According to the results of this study, the developed MgO catalyst is the active
and proficient catalyst in HA degradation using the catalytic ozonation process.