期刊
ENVIRONMENTAL POLLUTION
卷 167, 期 -, 页码 101-109出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.03.036
关键词
Soil; Triclosan; Methyl-triclosan; Degradation; Leaching
资金
- UK EPSRC
- Unilever
The anti-microbial substance triclosan can partition to sewage sludge during wastewater treatment and subsequently transfer to soil when applied to land. Here, we describe the fate of triclosan in a one-year plot experiment on three different soils receiving sludge. Triclosan and methyl-triclosan concentrations were measured in soil samples collected monthly from three depths. A large fraction of triclosan loss appeared to be explained by transformation to methyl-triclosan. After 12 months less than 20% of the initial triclosan was recovered from each soil. However, the majority was recovered as methyl-triclosan. Most of the chemical recovered at the end of the experiment (both triclosan and methyl-triclosan) was still in the top 10 cm layer, although there was translocation to lower soil horizons in all three soils. Between 16.5 and 50.6% of the applied triclosan was unaccounted for after 12 months either as a consequence of degradation or the formation of non-extractable residues. (C) 2012 Elsevier Ltd. All rights reserved.
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