Biotransformation of caffeine, cotinine, and nicotine in stream sediments: Implications for use as wastewater indicators

被引：96

作者：

Bradley, Paul M.

Barber, Larry B.

Kolpin, Dana W.

McMahon, Peter B.

Chapelle, Francis H.

机构：

[1] US Geol Survey, Columbia, SC 29210 USA

[2] US Geol Survey, Boulder, CO 80303 USA

[3] US Geol Survey, Iowa City, IA 52244 USA

[4] US Geol Survey, Denver Fed Ctr, Lakewood, CO 80225 USA

来源：

ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY | 2007年 / 26卷 / 06期

关键词：

biodegradation; emerging contaminants; oxic; anoxic; streams;

D O I：

10.1897/06-483R.1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microbially catalyzed cleavage of the imadazole ring of caffeine was observed in stream sediments collected upstream and downstream of municipal wastewater treatment plants (WWTP) in three geographically separate stream systems. Microbial demethylation of the N-methyl component of cotinine and its metabolic precursor, nicotine, also was observed in these sediments. These findings indicate that stream sediment microorganisms are able to substantially alter the chemical structure and thus the analytical signatures of these candidate waste indicator compounds. The potential for in situ biotransformation must be considered if these compounds are employed as markers to identify the sources and track the fate of wastewater compounds in surface-water systems.

引用

收藏

页码：1116 / 1121

页数：6

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