Optics and Photonics Society of Iran

The available elements in the input and output water from household water purifier device were identified by Laser Induced Breakdown Spectroscopy (LIBS) method. The relative intensity of Ca and Mg spectral lines as the main factors of water hardness, decreased in output water compared to input water. Fibers and carbon block filters, which have the most important role in elimination of mineral of water, were studied in both new and used types. Comparison between the new and used filters spectra indicated an increasing in relative intensity in used filters. The results of this research, indicate that with absorption of Ca and Mg by filters, the concentration of these elements in water (water hardness) are reduced after passing through the purifier device.