研究了7种常用的人工甜味剂[安赛蜜、三氯蔗糖、糖精、甜蜜素、纽甜、阿斯巴甜和NHDC(新橙皮苷二氢查耳酮)]在污水处理厂及自来水厂的分布.7种人工甜味剂在污水处理厂进水中均被检出,质量浓度为6.4 ～ 31 671.0 ng/L.安赛蜜、三氯蔗糖、糖精、甜蜜素在污水处理厂的出水中被检出,质量浓度为32.4 ～ 11 204.0 ng/L.这些甜味剂将随污水处理厂的出水排放而进入水环境.安赛蜜、三氯蔗糖、糖精、甜蜜素、纽甜在自来水厂进水中被检出,质量浓度为低于定量限～579.4 ng/L,其中前4种在自来水中被检出,质量浓度为23.3 ～504.2 ng/L.沉淀、絮凝、氯化消毒作用对人工甜味剂没有明显的去除作用.生物降解能有效去除糖精、甜蜜素、阿斯巴甜、纽甜和NHDC,但对安赛蜜和三氯蔗糖去除率不高,去除率均小于20％.%The occurrence and removal of seven commonly used artificial sweeteners, including acesulfame, sucralose, saccharin, cyclamate, neotame, aspartame and neohesperidin dihydrochalcone (NHDC) in waste water treatment processes ( WWTP) and drinking water treatment processes (DWTP) were assessed. All of the seven investigated artificial sweeteners were detected in the influent of WWTP, with concentrations ranging from 6. 4-31 ,671. 0 ng/L. The first four artificial sweeteners ( acesulfame, sucralose, saccharin and cyclamate) were detected in the effluent, with concentrations ranging from 32. 4-11 ,204. 0 ng/L. They might be a contaminant source for surface water. Acesulfame, sucralose, saccharin, cyclamate and neotame were found in the source water of DWTP, with concentrations between < LOQ and 579.4 ng/L. The first four artificial sweeteners were detected in drinking water, with concentrations ranging from 23.3-504.2 ng/L. The sedimentation, flocculation and chlorination in DWTP could not significantly remove the investigated artificial sweeteners. Compared with the other five artificial sweeteners ( saccharin, cyclamate, aspartame, neotame and NHDC) , sucralose and acesulfame were found to be very persistent against microbial degradation; their elimination rates in WWTP were less than 20% .
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