Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University), Ministry of Education, Dalian 116023, China.
Dalian center for certification and food and drug control, Dalian 116023, China.
Sci Total Environ. 2023 Sep 20;892:163867. doi: 10.1016/j.scitotenv.2023.163867. Epub 2023 May 17.
Artificial sweeteners (ASs) are emerging contaminants in the environment, primarily derived from wastewater treatment plant (WWTP) effluents. In this study, the influents and effluents of three WWTPs in the Dalian urban area, China, were analyzed for the distribution of 8 typical ASs to investigate their seasonal fluctuations in the WWTPs. The results showed that acesulfame (ACE), sucralose (SUC), cyclamate (CYC), and saccharin (SAC) were both detected in the influent and effluent water samples of WWTPs, with concentrations ranging from not detected (ND) to 14.02 μg·L. In addition, SUC was the most abundant ASs type, accounting for 40 %-49 % and 78 %-96 % of the total ASs in the influent and effluent water, respectively. The WWTPs revealed high removal efficiencies of CYC, SAC, and ACE, while the SUC removal efficiency was poor (26 % ± 36 %). The ACE and SUC concentrations were higher in spring and summer, and all ASs showed lower levels in winter, which may be caused by the high consumption of ice-cream in warmer months. The per capita ASs loads in the WWTPs were determined in this study based on the wastewater analysis results. The calculated per capita daily mas loads for individual ASs ranged from 0.45 g·d·1000p (ACE) to 2.04 g·d·1000p (SUC). In addition, the relationship between per capita ASs consumption and socioeconomic status showed no significant correlation.
人工甜味剂（ASs）是环境中的新兴污染物，主要来源于废水处理厂（WWTP）的废水。在这项研究中，分析了中国大连市三个 WWTP 的进水和出水，以研究其在 WWTP 中的季节性波动，评估 8 种典型 ASs 的分布情况。结果表明，乙酰磺胺酸钾（ACE）、三氯蔗糖（SUC）、环己基氨基磺酸钠（CYC）和糖精（SAC）均在 WWTP 的进水和出水水样中检出，浓度范围为未检出（ND）至 14.02μg·L。此外，SUC 是最丰富的 ASs 类型，分别占进水和出水总 ASs 的 40%-49%和 78%-96%。WWTP 对 CYC、SAC 和 ACE 的去除效率较高，而 SUC 的去除效率较差（26%±36%）。ACE 和 SUC 的浓度在春夏季较高，所有 ASs 在冬季水平较低，这可能是由于冰淇淋在温暖月份的高消费所致。本研究根据废水分析结果确定了 WWTP 中的人均 ASs 负荷。计算得出，各个 ASs 的人均日质量负荷范围为 0.45 g·d·1000p（ACE）至 2.04 g·d·1000p（SUC）。此外，人均 ASs 消费与社会经济地位之间的关系没有显著相关性。
