SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China.
SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Environment, South China Normal University, University Town, Guangzhou 510006, China.
Sci Total Environ. 2022 Feb 20;808:151866. doi: 10.1016/j.scitotenv.2021.151866. Epub 2021 Nov 23.
Drinking water quality and safety are very important in protecting human health. Chemical contaminants in drinking water system have become an increasing concern. Our knowledge about what chemicals are present in drinking water is still limited. Here we screened chemicals of emerging concern in a conventional drinking water system based on suspect, non-target screening and target analysis, and assessed their variations in different seasons and different treatment units. Overall, 720 chemicals were identified with HRMS databases from the suspect and non-target screening and 48 chemicals in five categories were further confirmed with the high confidence level, with predominance of pharmaceuticals and personal care products (PPCPs) and pesticides. Four compounds are newly found in aquatic environment with no literature or chemical occurrence data record. Temporal variations and variable removals were observed for these chemicals in the system. Target analysis of 110 PPCPs showed detection of 21, 19 and 22 compounds in the drinking water treatment plant with a concentration range of 0.11-844 ng/L in the three seasons, but only 8, 9 and 15 compounds detected in tap water (0.16-32.5 ng/L). The variations of the detected chemicals were less obvious in tap water, with most having concentrations below 2 ng/L. The results indicated efficient removal for most PPCPs in the drinking water system. The findings from this study demonstrated the strong capability of combined non-target screening and target analysis in identifying and assessing various organic chemicals in drinking water system.
饮用水的质量和安全对于保护人类健康非常重要。饮用水系统中的化学污染物已成为人们日益关注的问题。我们对于饮用水中存在哪些化学物质的了解仍然有限。在这里，我们基于可疑物、非靶向筛选和目标分析，对常规饮用水系统中的新兴关注化学物质进行了筛选，并评估了它们在不同季节和不同处理单元中的变化情况。总体而言，通过可疑物和非靶向筛选，从 HRMS 数据库中鉴定出了 720 种化学物质，通过高置信度进一步确认了五类中的 48 种化学物质，其中以药品和个人护理产品（PPCPs）和农药为主。有 4 种化合物是在水生环境中首次发现的，没有文献或化学出现数据记录。在该系统中，这些化学物质的时间变化和可变去除情况被观察到。对 110 种 PPCPs 的目标分析显示，在三个季节中，饮用水处理厂的浓度范围为 0.11-844ng/L，检出了 21、19 和 22 种化合物，但在自来水中仅检出 8、9 和 15 种化合物（0.16-32.5ng/L）。在自来水中，检测到的化学物质的变化不太明显，大多数的浓度低于 2ng/L。结果表明，饮用水系统对大多数 PPCPs 具有高效去除能力。本研究的结果表明，非靶向筛选和目标分析相结合的方法在识别和评估饮用水系统中的各种有机化学物质方面具有强大的能力。
