Post treatment of secondary wastewater effluent by magnesium oxide nanoparticles

الملخص EN

Background: Wastewater is one of the world's most serious issues today.

Not only does it have an impact on the environment and human health, but it also has an impact on economic and societal expenses.

Nanostructured materials have the potential to be used in wastewater treatment.

Objective: Application of nanostructured materials such as the Magnesium Oxide (MgO) nanoparticles to treat wastewater effluent.

Materials and Methods: The MgO nanoparticles were synthesized via co-precipitation methods.

Microbiological quality for both raw and treated secondary wastewater effluent was estimated by a viable cell count.

Bacteria were isolated from secondary wastewater samples by conventional methods to determine the minimum inhibitory concentration (MIC).

Moreover, some of the chemical and physical parameters for raw and filtrated secondary wastewater samples were measured according to standard methods.

Results: The MgO nanoparticles have antimicrobial activity against: Gram-positive bacteria Staphylococcus aureus at 7 mg/ml, Gram-negative bacteria Escherichia coli at 6 mg/ml, Klebsiella sp.

at 9 mg/ml, Salmonella sp.

at 10 mg/ml, and Shigella sp.

at 8 mg/ml.

The chemical and physical parameters such as (COD, BOD, NH4+ and +2Mg) were decreased significantly during the filtration process of MgO nanostructured powder compared with raw wastewater, P-value = 0.044.

Conclusion: Magnesium oxide nanoparticles have a tangible bactericidal effect on wastewater bacteria.