The use of nanotechnology for drinking water purification becomes the emerging field around the world. Usually the nanoparticles are synthesized by variety of chemicals which are quite toxic, flammable in nature and their modes of working are unethical for mankind. The extensive application of the AgNP results in their inevitable release into the environment. Silver nanoparticle is known as excellent antimicrobial agents and therefore they could be used as alternative disinfectant agents. It was found that the aggregation of AgNPs depends on the properties of the background ions, such as Na⁺ and Ca²⁺ at different water chemistry conditions. The antimicrobial properties of AgNPs when coated with different organic compounds using natural water conditions. The results obtained showed that silver nanoparticles in surface water and ground water are stable.

The composition of AgNPs - impregnated RO-filters and silver- impregnated RO-filters. This study was performed using different water chemistry condition and different manufacturing materials. The results showed that AgNPs- impregnated RO Water filters are more appropriate for this application due to the lesser amount of silver nitrate treated filters.

The bacterial removal performance of the AgNPs-treated RO- Water filters and concentration of viable bacteria in the filters are dose-dependent on the amount of silver applied.