Guo Wei, Li Jun, Liu Qingwei, Shi Jianghong, Gao Yue
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China.
J Hazard Mater. 2021 Jul 15;414:125498. doi: 10.1016/j.jhazmat.2021.125498. Epub 2021 Feb 23.
Artificial sweeteners (ASs), as a new emerging pollutant, the fate from wastewater treatment plants (WWTPs) to sea is growing concerned. In this study, the distribution and polluted loading of six typical ASs were analyzed based on the measurement in influent, primary effluent, secondary effluent, tertiary effluent, suspended particulate matter (SPM), and sludge from four WWTPs and receiving waters near the coast of Shenzhen city, China. Elevated levels of ASs were detected in WWTPs located near a highly populated area (about 14,000 people km). Sucralose was predominant in all water samples (0.1-22.2 μg L), and had a 1.6-704.0 times higher concentration than the means of other ASs detected. Aspartame were mainly distributed in SPM and sludge, and the fractions in offshore water exceeded 45%. Acesulfame, sucralose, cyclamate and saccharin could be effectively removed by secondary biochemical treatment. The average daily loading (4.2 g d 1000people) and discharge loading (0.4 g d 1000people) of sucralose in WWTPs was higher than those of the other ASs. Dissolved organic carbon and UV can affect the fate of ASs, and SPM mainly affects the distributions of aspartame and neotame. As a potential sewage indicator, neotame deserves further attention.
人工甜味剂（ASs）作为一种新兴污染物，其从污水处理厂（WWTPs）到海洋的归宿日益受到关注。本研究基于对中国深圳市海岸附近四个污水处理厂及其受纳水体的进水、一级出水、二级出水、三级出水、悬浮颗粒物（SPM）和污泥的测量，分析了六种典型人工甜味剂的分布和污染负荷。在人口高度密集地区（约14000人/平方公里）附近的污水处理厂中检测到人工甜味剂水平升高。所有水样中三氯蔗糖占主导（0.1 - 22.2μg/L），其浓度比检测到的其他人工甜味剂的平均浓度高1.6 - 704.0倍。阿斯巴甜主要分布在悬浮颗粒物和污泥中，其在近岸水体中的占比超过45%。乙酰磺胺酸钾、三氯蔗糖、甜蜜素和糖精可通过二级生化处理有效去除。污水处理厂中三氯蔗糖的日均负荷（4.2克/天·1000人）和排放负荷（0.4克/天·1000人）高于其他人工甜味剂。溶解有机碳和紫外线会影响人工甜味剂的归宿，悬浮颗粒物主要影响阿斯巴甜和纽甜的分布。作为一种潜在的污水指标，纽甜值得进一步关注。
