Partitioning and Degradation of Triclosan and Formation of Methyl-Triclosan in Water-Sediment Systems

被引：24

作者：

Huang, Xiaolong ^{[1
,2
]}

Wu, Chenxi ^{[1
]}

Xiong, Xiong ^{[1
,2
]}

Zhang, Kai ^{[1
,2
]}

Liu, Jiantong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

WATER AIR AND SOIL POLLUTION | 2014年 / 225卷 / 09期

关键词：

Adsorption; Degradation; Triclosan; Methyl-triclosan; Water-sediment system; WIDELY USED BIOCIDE; SURFACE WATERS; WASTE-WATER; TREATMENT PLANTS; BACTERICIDE TRICLOSAN; MASS-SPECTROMETRY; TRICLOCARBAN; FATE; SORPTION; SOILS;

D O I：

10.1007/s11270-014-2099-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption and degradation processes of triclosan (TCS) were studied in the laboratory using field-collected sediments of different physicochemical properties. Batch equilibrium experiment indicated that adsorption isotherms were fitted well to both linear and Freundlich model with linear sorption coefficients (K-d) varied from 147 to 1,425 mL mu g(-1). The sediment with a higher organic carbon content and a lower pH value had the greatest adsorption capability. Degradation experiment showed that triclosan was relatively stable in water with calculated half-life values ranged from 89 to 161 days. No degradation in sterilized water suggested that the loss of triclosan was due to biological processes. Degradation was more rapid in water-sediment system than in water, and the calculated half-life value in water-sediment systems ranged from 32 to 62 days. Methylation of triclosan was observed in all studied sediments, but the amount of methyl-triclosan (M-TCS) accounted for less than 5 % of the degradated TCS.

引用

页数：10

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