In this study, we fabricated and evaluated the properties of water-purifier filters with added hydroxyapatite (HAp). The antibacterial property of HAp filters was assessed using the pour-plate method as per the requirements of the Korean Standards Association (KS K 0693 : 2011). The pH and calcium-ion concentration of water that was filtered through the HAp filters were measured using a pH meter and an Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES), respectively. The HAp filters eliminated 99% of 3 types of bacteria (Staphylococcus aureus ATCC 6538, Klebsiella pneumoniae ATCC 4352, and Escherichia coli ATCC 25922), and the average pH and calcium-ion concentration were 8.0-9.0 and 17.6 ppm, respectively.

Keywords: Hydroxyapatite, Water purifier, Ion exchange, pH, Antibacterial.