期刊
ENVIRONMENTAL POLLUTION
卷 158, 期 9, 页码 2826-2832出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2010.06.023
关键词
Antibiotics; Humic acid; Hydrophobic organic contaminants; Sediment; Mineral
资金
- National Scientific Foundation of China [40973081, 40803034]
- Research Grant for Future Talents of Yunnan Province
The environmental behavior of antibiotics has attracted great research attention. However, their sorption mechanisms in soils/sediments are still unknown. Comparison of the sorption properties between the widely-studied hydrophobic organic contaminants (HOCs) and antibiotics may provide valuable insight to antibiotic sorption mechanisms. Thus, in this study batch experiments for pyrene (PYR), bisphenol A (BPA), and sulfamethoxazole (SMX) sorption were conducted on a sediment sample and its separated fractions. Our results showed the high sorption of PYR on black carbon and organic matter. Although high sorption of SMX was observed for both separated organic fractions (humic acids) and inorganic mineral particles, the original sediment particles showed relatively low sorption. Competitive sorption between SMX and dissolved humic acid on mineral particles was observed in this study. This competitive interaction is a unique process for antibiotic sorption in soils/sediments compared with apolar HOCs and may be one of the important factors controlling the antibiotic sorption. (C) 2010 Elsevier Ltd. All rights reserved.
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