원문정보
초록
영어
This study was investigated to determine the differences in bacteriological characteristics and water quality parameters between tap water (TW) and purified water (PW) produced by LG purifiers in the Wonju region, assessing the safety and efficacy of these purifiers in enhancing tap water quality. Water samples were collected from three categories of apartment buildings—A (5 years old), B (30 years old), and C (over 30 years old)—with a total of 120 samples (40 samples from each category, including 20 each of TW and PW). To ensure sample integrity, strict standard operating procedures were implemented. Water quality parameters, including pH, free chlorine, and concentrations of various metals, were thoroughly analyzed. Bacterial colony counts in the water samples were quantified using the plate count method. Our results indicated that pathogenic bacteria concentrations were significantly higher in the TW group across all three categories of apartment buildings. However, the concentrations of total phosphorus (TP) and phenols in PW from building A, as well as lead (Pb) and phenol levels in PW from buildings B and C, exceeded the safety standards established by the city of Wonju. Additionally, the total organic carbon (TOC) and phenol levels in TW from building C exceeded safety limits. The use of the LG filter PW group was associated with a marked reduction in oxidation-reduction potential (ORP), free chlorine, nitrate nitrogen (NO3-N), and silicon (Si) concentrations; however, it simultaneously increased fluoride (F), zinc (Zn), phenols, and total nitrogen (TN) levels. Overall, our findings suggest that LG filtration system did not exhibit significant adverse effects on water quality. The increasing public concern regarding TW quality emphasizes the demand for effective water purification solutions. Therefore, future research studies are needed for optimization of water treatment processes and assessing long-term health impacts for improved drinking water safety.