Partition uptake of a brominated diphenyl ether by the edible plant root of white radish (Raphanus sativus L.).
Polybrominated diphenyl ethers (PBDEs) are of a class of emerging contaminants. In this study, the accumulation of 4-bromodiphenyl ether (BDE-3) by different parts of a live white radish was investigated. Different cultural media (hydroponics, silica sand, and soil) were used to sustain the radish plant during its uptake and in-plant translocation of BDE-3. The results showed that BDE-3 can be translocated from the roots to the aboveground organs and the accumulated levels of BDE-3 in different parts of the white radish followed the order for the three types of cultivation: fibrous roots > peels > main roots > leaves. The results were analyzed by the aid of the partition-limited model for the plant uptake. The relevant partition coefficients (KOCand Kd) and uptake parameters of BDE-3 with plant components (Kptand Klip) were obtained for analyzing the BDE-3 distribution. The partition-limited model offers a significant insight into the uptakes of BDE-3 by the various components of live white radishes. The types of cultivation affected the total sorption level, translocation factors (TFs), extent to equilibrium (αpt), and root concentration factors (RCFs).
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan.
Chien-Ying
CY
Yang
Department of Environmental Engineering, Van Nung University, No.1, Van Nung Rd., Chung-Li, Tao-yuan 326, Taiwan. Electronic address: mlchang@mail.vnu.edu.tw.
Meei-Ling
ML
Chang
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan.
Siang Chen
SC
Wu
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 106, Taiwan. Electronic address: yhs@ntu.edu.tw.
Yang-Hsin
YH
Shih
D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D010945:Plants, Edible / Q000378:metabolism; D031224:Raphanus / Q000737:chemistry / Q000378:metabolism*; D012987:Soil; D012989:Soil Pollutants / Q000378:metabolism*
D055768:Halogenated Diphenyl Ethers; D012987:Soil; D012989:Soil Pollutants
4-Bromodiphenyl ether; Partition-limited model; Plant uptake; Quasi-equilibrium factor; White radish