Saccharin and other artificial sweeteners in soils: estimated inputs from agriculture and households, degradation, and leaching to groundwater.

标题Saccharin and other artificial sweeteners in soils: estimated inputs from agriculture and households, degradation, and leaching to groundwater.
文章类型Journal Article
发表年度2011
作者Buerge, I. J., Keller M., Buser H. - R., Müller M. D., & Poiger T.
期刊Environmental science & technology
45
2
页码615-21
发表日期2011 Jan 15
关键词Agriculture, Biodegradation, Environmental, Environmental Monitoring, Feces, Fresh Water, Herbicides, Housing, Manure, saccharin, Sewage, Soil, Soil Microbiology, Soil Pollutants, Sucrose, Sulfonylurea Compounds, Sweetening Agents, Thiazines, Waste Disposal, Fluid, Water Pollutants, Chemical
摘要

Artificial sweeteners are consumed in substantial quantities as sugar substitutes and were previously shown to be ubiquitously present in the aquatic environment. The sweetener saccharin is also registered as additive in piglet feed. Saccharin fed to piglets was largely excreted and, consequently, found in liquid manure at concentrations up to 12 mg/L, where it was stable during 2 months of storage. Saccharin may thus end up in soils in considerable quantities with manure. Furthermore, other studies showed that saccharin is a soil metabolite of certain sulfonylurea herbicides. Sweeteners may also get into soils via irrigation with wastewater-polluted surface water, fertilization with sewage sludge (1-43 μg/L), or through leaky sewers. In soil incubation experiments, cyclamate, saccharin, acesulfame, and sucralose were degraded with half-lives of 0.4-6 d, 3-12 d, 3-49 d, and 8-124 d, respectively. The relative importance of entry pathways to soils was compared and degradation and leaching to groundwater were evaluated with computer simulations. The data suggest that detection of saccharin in groundwater (observed concentrations, up to 0.26 μg/L) is most likely due to application of manure. However, elevated concentrations of acesulfame in groundwater (up to 5 μg/L) may result primarily from infiltration of wastewater-polluted surface water through stream beds.

Alternate JournalEnviron. Sci. Technol.