The extensive industrial use of brominated flame retardants has aroused rapidly growing public concerns about their ubiquity in the environment. The feasibility of uptake and translocation of decabromodiphenyl ether (BDE-209) by three rice cultivars, namely Fengmeizhan, Hefengzhan and Guangyinzhan, and the uptake mechanisms of BDE-209 into rice roots, were investigated by employing a partition-limited model. Uptake of BDE-209 by the rice cultivars (Fengmeizhan, Hefengzhan and Guangyinzhan) was examined by a 60-day cultivation in sterilized BDE-209 spiked sand, followed by Soxhlet extraction and gas chromatography–mass spectrometry (GC–MS) analysis. A partition-limited model was applied for estimating and describing the approach of the uptake of BDE-209 by rice in sand. The average quasi-equilibrium factor (αᵨᵼ) of BDE-209 in root uptake in sand was 0.112 × 10¯³ for three rice cultivars in the present study (<1), implying a non-equilibrium movement of molecules and a dominated passive transport uptake. According to the results of sorption analysis of dead and fresh roots, apoplastic pathway likely dominated the transport of BDE-209 into roots cells. Copyright © 2014 Published by Elsevier Ltd.
CitationChow, K. L., Man, Y. B., Tam, N. F. Y., Liang, Y., & Wong, M. H. (2015). Uptake and transport mechanisms of decabromodiphenyl ether (BDE-209) by rice (Oryza sativa). Chemosphere, 119, 1262-1267.
- Apoplastic path
- Brominated flame retardants
- Partition-limited model
- Quasi-equilibrium factor