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Effects of accompanying anions on cesium retention and translocation via droplets on soybean leaves

文献类型： 外文期刊

作者： Yan, Dong 1 ; Zhao, Ye 1 ; Lu, Anxiang 2 ; Wang, Shuifeng 1 ; Xu, Dongyu 1 ; Zhang, Ping 1 ;

作者机构： 1.Beijing Normal Univ, State Key Lab Water Environm Simulat, Sch Environm, Beijing 100875, Peoples R China

2.Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

关键词： Accompanying anion;Cesium;Retention;Translocation;Leaves;SEM-EDX

期刊名称：JOURNAL OF ENVIRONMENTAL RADIOACTIVITY （ 影响因子：2.674； 五年影响因子：2.622 ）

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收录情况： SCI

摘要： Plant foliar uptake and translocation is an important pathway for the migration of radiocesium to the human diet. This study reports the effects of accompanying anions (NO_3~-, SO_4~(2-), CO_3~(2-), and I~-) on cesium retention and translocation. An experiment to simulate cesium retention and translocation was conducted in a greenhouse by applying droplets of stable cesium solutions to the upper surface of four soybean [Glycine max (L.) Merr.] trifoliate leaves. The average percentages of cesium retention with the accompanying anions NO_3~-, SO_4~(2-), CO_3~(2-), and I~- on the leaves were 7.2, 21.5, 49.3, and 10.2%, respectively. Retention values of the four treatments were stable during the 3-day exposure period, indicating that cesium could be absorbed and penetrate the cuticle quickly once it was dissolved. Scanning electron microscopy coupled with energy dispersive X-ray microanalysis showed that particles containing cesium remained on the leaf surfaces after washing. Also, nano-sized particles containing cesium were observed inside the leaf tissues. Cesium concentrations in the uncontaminated leaves, pods, stems, and roots increased during the study period indicating cesium redistribution from the contaminated leaves.

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