Historical Trends of N-Cyclohexyl-2-benzothiazolamine, 2-(4-Morpholinyl)benzothiazole, and Other Anthropogenic Contaminants in the Urban Reservoir Sediment Core
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- 作者：Hidetoshi Kumata ; Yukihisa Sanada ; Hideshige Takada ; and Takashi Ueno
- 刊名：Environmental Science & Technology
- 出版年：2000
- 出版时间：January 15, 2000
- 年：2000
- 卷：34
- 期：2
- 页码：246 - 253
- 全文大小：186K
- 年卷期：v.34,no.2(January 15, 2000)
- ISSN：1520-5851
文摘
A new potential molecular marker, N-cyclohexyl-2-benzothiazolamine (NCBA), was discovered in variousenvironmental matrices (i.e., road dusts, runoff- and river-water particles, river sediments, aerosols) taken inTokyo, Japan. Concurrent determination of this compoundtogether with 2-(4-morpholinyl)benzothiazole (24MoBT),previously proposed marker of road dust, demonstrated thatboth compounds are widely distributed in the urbanenvironment (~ng/g to ~
g/g), derived from vehicle tiretread, and transported in the environments in the same way.To assess utilities of NCBA and 24MoBT as molecularmarkers for vehicle-derived contaminants, these compoundswere analyzed in a sediment core from the ChidorigafuchiMoat of Imperial Palace, situated in the center of Tokyo.Remarkable is that NCBA existed at higher concentrationsthan 24MoBT near the surface (0-6 cm depth) andbottom parts (16-24 cm depth) of the region where BTswere detected but lower in the middle parts (6-16 cm depth).Dating of the core by using 137Cs and tetrapropylene-based alkylbenzenes (TABs) revealed the two changeoverscoincide well with changes in the production history ofvulcanization accelerators containing the compounds. Thedated downcore profile of 
BTs (sum of 24MoBT andNCBA) showed positive correlation with the traffic data inTokyo Metropolitan Area. These results indicate theusefulness of NCBA and 24MoBT as time markers forrecent sections of sediment cores and as molecular markersfor reconstructing the history of traffic-induced contamination.
g/g), derived from vehicle tiretread, and transported in the environments in the same way.To assess utilities of NCBA and 24MoBT as molecularmarkers for vehicle-derived contaminants, these compoundswere analyzed in a sediment core from the ChidorigafuchiMoat of Imperial Palace, situated in the center of Tokyo.Remarkable is that NCBA existed at higher concentrationsthan 24MoBT near the surface (0-6 cm depth) andbottom parts (16-24 cm depth) of the region where BTswere detected but lower in the middle parts (6-16 cm depth).Dating of the core by using 137Cs and tetrapropylene-based alkylbenzenes (TABs) revealed the two changeoverscoincide well with changes in the production history ofvulcanization accelerators containing the compounds. Thedated downcore profile of BTs (sum of 24MoBT andNCBA) showed positive correlation with the traffic data inTokyo Metropolitan Area. These results indicate theusefulness of NCBA and 24MoBT as time markers forrecent sections of sediment cores and as molecular markersfor reconstructing the history of traffic-induced contamination.