Qom University of Medical Sciences Journal

Background and objective
Hydrogen peroxide solution with stabilized formulation with oligodynamic amounts of silver
ion (trade mark: Nanosil) recently became a popular disinfectant for fruits, vegetables,
surfaces, medical instruments and so on.
Methods
This study was based on determining efficiency of hydrogen peroxide-silver ion complex in
six different concentrations measured through removal of total coli forms from samples taken
from Qom wastewater. All six different concentrations of disinfectant were incubated
separately with wastewater for one hour. Sample size was 12 and sampling was done weekly.
Results
In the concentration of 80 and 480 mg/l, logarithmic removal value of total coli forms was 1.9
and 4.5 respectively. In CT value 8600(mg/l).min and more, the total coli forms effluent
standard for surface water discharge and agriculture irrigation was achieved (Iranian
environmental protection agency act).
Conclusion
Use of hydrogen peroxide-silver ion complex as a water and wastewater disinfectant, has
some benefits such as elimination of hazardous by products, measurable residual amount and
so on. However its application in wastewater effluent is more costly than other usual
disinfectants so it is not economically advisable.