Three-dimensional distributions of sewage markers in Tokyo Bay water—fluorescent whitening agents (FWAs)

Three-dimensional distributions of fluorescent whitening agents (FWAs: more specifically, DSBP and DAS1), which are sewage-derived water-soluble markers, were observed in Tokyo Bay water through multi-layer sampling of water at 20 locations. In summer, FWAs predominated in the surface layers, with t...

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Bibliographic Details
Published in:Marine pollution bulletin 2006-03, Vol.52 (3), p.281-292
Main Authors: Managaki, Satoshi, Takada, Hideshige, Kim, Dong-Myung, Horiguchi, Toshihiro, Shiraishi, Hiroaki
Format: Article
Language:English
Subjects:
Applied sciences
Benzenesulfonates - analysis
Benzenesulfonates - chemistry
Biphenyl Compounds - analysis
Biphenyl Compounds - chemistry
Coastal zone
Coloring Agents - analysis
Coloring Agents - chemistry
Demography
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Fluorescent whitening agents
Humans
Japan
Molecular markers
Natural water pollution
Pollution
Pollution, environment geology
Seasons
Seawater
Seawaters, estuaries
Sewage
Stilbenes - analysis
Stilbenes - chemistry
Synthetic detergents
Tokyo Bay
Vertical and spatial distributions
Water Pollutants, Chemical - analysis
Water treatment and pollution
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Summary:Three-dimensional distributions of fluorescent whitening agents (FWAs: more specifically, DSBP and DAS1), which are sewage-derived water-soluble markers, were observed in Tokyo Bay water through multi-layer sampling of water at 20 locations. In summer, FWAs predominated in the surface layers, with trace but significant concentration of FWAs in bottom water due to stratification of seawater. In winter, on the other hand, FWAs were extensively mixed into the bottom layers because of the vertical mixing of seawater. In the surface layer, FWA concentrations and the DSBP/DAS1 ratio (the concentration ratio of DSBP to DAS1) were lower in summer than in winter, suggesting more efficient photodegradation of FWAs in euphotic zones during the summer due to stronger solar radiation. Horizontally, FWAs were widely distributed over the surface layer of Tokyo Bay. Surface water with DSBP concentrations above 50 ng/L, corresponding to
ISSN:0025-326X
1879-3363
DOI:10.1016/j.marpolbul.2005.08.025