| 浙江省H市水处理及供水系统4种人工甜味剂的分布特征 |
| 摘要点击 1435 全文点击 626 投稿时间：2019-10-14 修订日期：2019-11-11 |
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| 中文关键词 新型污染物 人工甜味剂 污水处理系统 饮用水处理系统 水质安全 |
| 英文关键词 emerging pollutants artificial sweeteners sewage treatment systems drinking water treatment systems water quality safety |
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| 中文摘要 |
| 以浙江省某市的饮用水及污水处理系统为主要调研对象，通过固相萃取-高效液相色谱（solid phase extraction-high performance liquid chromatography，SPE-HPLC）法展开了生活污水处理系统、水源、饮用水处理及供水系统中常见人工甜味剂的浓度调查.结果表明，SPE-HPLC可准确测定水中安赛蜜、糖精、阿斯巴甜和纽甜，检测限分别为57、120、170和47μg·L-1，定量限分别为190、400、567和157μg·L-1；PWAX柱固相萃取优化后，安赛蜜与糖精的回收率分别提高到86.5%和97.7%，而纽甜的回收率略下降至66.5%.生活污水中安赛蜜、糖精与纽甜的检出率可达100.0%，阿斯巴甜检出率仅为33.3%，4种人工甜味剂的最高浓度为0.83、4.52、1.22和7.57μg·L-1.水源水中安赛蜜、糖精、阿斯巴甜和纽甜最高检出浓度为22.94、39.17、0.73和8.92μg·L-1，检出率为分别为72.7%、90.9%、18.2%和90.9%.预臭氧工艺对安赛蜜、糖精和纽甜去除率为67.7%~100.0%，深度处理工艺对4种人工甜味剂去除效果好，去除率为73.7%~100.0%，有效降低了饮用水水质风险，管网中未检测到4种人工甜味剂的存在. |
| 英文摘要 |
| Taking the sewage and drinking water treatment system of two cities in Zhejiang Province as the main research target, a systematic investigation on the common artificial sweeteners was carried out by solid phase extraction-high performance liquid chromatography (SPE-HPLC). The results showed that SPE-HPLC can accurately determine micro acesulfame (ACE), saccharin (SAC), aspartame (ASP), and neotame (NEO) in water. The detection limits were 57, 120, 170, and 47 μg·L-1, and the quantification limits were 190, 400, 567, and 157 μg·L-1, respectively. After optimization of the solid phase extraction procedure when using PWAX columns, the recoveries of ACE and SAC were enhanced to 86.5% and 97.7%; however, it slightly decreased to 66.5% for NEO. The occurrence rates of ACE, SAC, and NEO in domestic sewage were 100.0%, and it was only 33.3% for ASP. The highest concentrations of four aforementioned artificial sweeteners in domestic sewage were 0.83, 4.52, 1.22, and 7.57 μg·L-1, respectively. The highest concentrations of acesulfame, saccharin, aspartame, and neotame in source water were 22.94, 39.17, 0.73, and 8.92 μg·L-1, respectively, and detection rates were 72.7%, 90.9%, 18.2%, and 90.9%, respectively. Most artificial sweeteners were removed by the prozone process; the removal efficiencies of ACE, SAC, and NEO ranged from 67.7% to 100.0%, and the removal efficiencies of ACE, SAC, and NEO by the advanced treatment process ranged from 73.7% to 100.0%, which effectively reduced the risk of drinking water quality. The four artificial sweeteners were not detected in the water supply network. |
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