The different fate of antibiotics in the Thames River, UK, and the Katsura River, Japan

Hanamoto, Seiya; Nakada, Norihide; Juergens, Monika D.; Johnson, Andrew C.; Yamashita, Naoyuki; Tanaka, Hiroaki. 2018 The different fate of antibiotics in the Thames River, UK, and the Katsura River, Japan. Environmental Science and Pollution Research, 25 (2). 1903-1913.

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Little is known about the mechanisms influencing the differences in attenuation of antibiotics between rivers. In this study, the natural attenuation of four antibiotics (azithromycin, clarithromycin, sulfapyridine, and sulfamethoxazole) during transport along the Thames River, UK, over a distance of 8.3 km, and the Katsura River, Japan, over a distance of 7.6 km was compared. To assist interpretation of the field data, the individual degradation and sorption characteristics of the antibiotics were estimated by laboratory experiments using surface water or sediment taken from the same rivers. Azithromycin, clarithromycin, and sulfapyridine were attenuated by 92, 48, and 11% in the Thames River stretch. The first-order decay constants of azithromycin and sulfapyridine were similar to those in the Katsura River, while that of clarithromycin was 4.4 times higher. For sulfamethoxazole, the attenuation was limited in both rivers. Loss of sulfapyridine was attributed to both direct and indirect photolysis in the Thames River, but to only direct photolysis in the Katsura River. Loss of azithromycin and clarithromycin was attributed to sorption to sediment in both rivers. The probable explanation behind the difference in loss rates of clarithromycin between the two rivers was considered to be sediment sorption capacity.

Item Type: Publication - Article
Digital Object Identifier (DOI):
CEH Sections/Science Areas: Pollution (Science Area 2017-)
ISSN: 0944-1344
Additional Keywords: antibiotics, natural attenuation, sorption, sediment, direct photolysis, indirect photolysis
NORA Subject Terms: Ecology and Environment
Date made live: 16 Nov 2017 12:12 +0 (UTC)

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