Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Environ Pollut. 2013 Jan;172:53-60. doi: 10.1016/j.envpol.2012.08.010. Epub 2012 Sep 13.
A pot experiment was conducted to investigate the solubility and redox species of antimony (Sb) in a relocated shooting range soil and its uptake by Lolium perenne L. and Holcus lanatus L. under different water regimes. After 1-week waterlogging, the total Sb concentration in soil solution decreased from ∼110 μg L(-1) to <20 μg L(-1), and slowly increased over the following 4 weeks, with the dissolution of Fe and Mn (hydr)oxides. In this process, half of the Sb in soil solution was reduced to Sb(III), which greatly affected the plant uptake of Sb. Waterlogging increased shoot Sb concentrations of L. perenne by ∼10 fold but decreased uptake in H. lanatus by 80%. Results indicate that Sb might primarily be taken up as Sb(III) by L. perenne and as Sb(V) by H. lanatus. Temporary waterlogging of soil may increase the risk of trace elements entering the food chain.
进行了一项盆栽实验，以研究再定位射击场土壤中锑（Sb）的溶解度和氧化还原物种，以及其在不同水分条件下被黑麦草（Lolium perenne L.）和毛马唐（Holcus lanatus L.）吸收的情况。淹水 1 周后，土壤溶液中的总 Sb 浓度从约 110μg/L 降至 <20μg/L，并在随后的 4 周内缓慢增加，这与 Fe 和 Mn（氢）氧化物的溶解有关。在此过程中，土壤溶液中一半的 Sb 被还原为 Sb(III)，这极大地影响了植物对 Sb 的吸收。淹水使黑麦草地上部 Sb 浓度增加了约 10 倍，但使毛马唐的 Sb 吸收量减少了 80%。结果表明，Sb 可能主要被黑麦草作为 Sb(III)吸收，而被毛马唐作为 Sb(V)吸收。土壤的暂时性淹水可能会增加微量元素进入食物链的风险。
