期刊
ENVIRONMENTAL POLLUTION
卷 204, 期 -, 页码 133-140出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.04.019
关键词
Antimony uptake; Antimony toxicity; In-situ analysis
资金
- National Natural Science Foundation of China [41422105, 41171189]
- Natural Science Foundation of Jiangsu Province [BK20130050]
Although iron (Fe) plaque has been shown to significantly affect the uptake of toxic antimony (Sb) by rice, knowledge about the influence of iron plaque on antimony (Sb) (amount, mechanisms, etc) is, however, limited. Here, the effect of Fe plaque on Sb(III) and Sb(V) (nominal oxidation states) uptake by rice (Oryza sativa L) was investigated using hydroponic experiments and synchrotron-based techniques. The results showed that iron plaque immobilized Sb on the surface of rice roots. Although the binding capacity of iron plaque for Sb(III) was markedly greater than that for Sb(V), significantly more Sb(III) was taken up by roots and transported to shoots. In the presence of Fe plaque, Sb uptake into rice roots was significantly reduced, especially for Sb(III). However, this did not translate into decreasing Sb concentrations in rice shoots and even increased shoot Sb concentrations during high Fe Sb(III) treatment. (C) 2015 Elsevier Ltd. All rights reserved.
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