Park Dahae, Jung Sungjin, Kim Hekap
Department of Environmental Science, Kangwon National University, Chuncheon, Republic of Korea.
Environmental Health Center, Kangwon National University Hospital, Chuncheon, Republic of Korea.
Environ Anal Health Toxicol. 2025 Mar;40(1):e2025008-0. doi: 10.5620/eaht.2025008. Epub 2025 Mar 14.
This study aimed to analyze the spatial and temporal distribution of N-nitrosamines (NAs) in water samples collected from the Soyang Drinking Water Treatment Plant (DWTP) and five tap water sampling locations in Chuncheon, Gangwon State, Republic of Korea, located 0.9 to 6.2 km away from the DWTP. The treated water from the DWTP was monitored for 24 h. NAs were quantitatively measured using high-performance liquid chromatography with fluorescence detection (HPLC-FLD) after solid-phase extraction (SPE) with Carboxen 572, denitrosation, and dansylation. Three NAs in the water samples showed high detection rates exceeding 66.7%, with N-nitrosodimethylamine (NDMA) levels reaching up to 45.0 ng/L in the DWTP and 62.6 ng/L in tap water. The concentration of NDMA increased from 2.50 to 30.7 ng/L in 24 h and showed a significant correlation with dimethylamine, temperature, dissolved organic carbon and nitrogen, and total chlorine. This study highlighted the importance of using advanced monitoring systems for tap water and the necessity of implementing strategies to control NAs.
本研究旨在分析从韩国江原道春川市昭阳饮用水处理厂（DWTP）以及距离该厂0.9至6.2公里的五个自来水采样点采集的水样中N-亚硝胺（NAs）的时空分布。对DWTP的处理水进行了24小时监测。采用Carboxen 572进行固相萃取（SPE）、脱亚硝化和丹磺酰化后，使用带荧光检测的高效液相色谱法（HPLC-FLD）对NAs进行定量测定。水样中的三种NAs检出率较高，超过66.7%，其中N-亚硝基二甲胺（NDMA）在DWTP中的含量高达45.0 ng/L，在自来水中高达62.6 ng/L。NDMA的浓度在24小时内从2.50 ng/L增加到30.7 ng/L，与二甲胺、温度、溶解有机碳和氮以及总氯呈显著相关。本研究强调了对自来水使用先进监测系统的重要性以及实施控制NAs策略的必要性。
