Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 547, Issue -, Pages 9-16Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2015.12.119
Keywords
CWs; Triclosan; Removal mechanism
Categories
Funding
- National Water Special Project [2012ZX07203-004]
- National Science Foundation of China [21007032, 21307078]
- Shandong Provincial Natural Science Foundation, China [2009ZRB019Y9]
- Independent Innovation Foundation of Shandong University [2014JC023]
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Plants can bioaccumulate triclosan and bond with microbes and sediments in constructed wetlands (CWs) as well. However, little is known regarding the species-specific removal mechanism of CWs components and the selection of suitable wetland plant species for triclosan disposal. In this work, the use of bioaccumulation factors (BAFs) and biota to sediment accumulation factors (BSAFs) for choosing the best triclosan removal plant species was studied in laboratory-scale CWs. By the end of the experiment, over 80% of triclosan was removed and a specie-effect distribution was revealed in CWs with emergent, submerged and floating plants. By mass balance calculation, negative correlation between triclosan concentration in plants and degradation process was observed. The significant correlations between Log BSAFs values and triclosan concentration in plants or degradation contribution made it possible and reasonable in wetland plants selection. Introductions on plant species were provided considering the target removal process or regulation method. This work provided new information on plant species selection in CWs for triclosan removal or its emergency remediation by using bioaccumulative factors. (C) 2015 Elsevier B.V. All rights reserved.
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