Verification of radiocesium decontamination from farmlands by plants in Fukushima
Verification of radiocesium decontamination from farmlands by plants in Fukushima
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福岛植物对农田放射性铯净化的验证
DOI：
10.1007/s10265-013-0607-x
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发表时间：
2014
影响因子：
2.8
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Kobayashi;K.;Okouchi;T.;Yamagami;M. and Shinano;T.
本研究的目的是验证植物对福岛农田放射性铯的净化作用，并筛选出可用于植物修复的植物。在浅耕和深耕（分别为0-8和0-15 cm犁耕）的农田中种植来自三个科（菊科、豆科和禾本科）的13种作物。改变耕作深度，可望使根系与土壤中放射性铯的接触带不同。放射性铯134 Cs和137 Cs的放射性值分别为22-179和29-225 Bq kg干重-1。浅田植物的134 Cs和137 Cs转移因子分别为0.021 ~ 0.12和0.019 ~ 0.13，几何平均值分别为0.051和0.057。深田植物的134 Cs和137 Cs转移因子分别为0.019 ~ 0.13和0.022 ~ 0.13，几何平均值分别为0.045和0.063。虽然计算了减少比率以评估在培养期间放射性铯从污染土壤中的减少（即，植物修复能力），没有植物物种导致显着减少放射性铯在土壤中的测试作物。这些结果应跟踪数年，并需要进一步分析，以评估植物修复技术是否适用于放射性污染的农田。
The purpose of this study was to verify radiocesium decontamination from Fukushima farmland by plants and to screen plants useful for phytoremediation. Thirteen species from three families (Asteraceae, Fabaceae, and Poaceae) of crops were grown in shallow and deeply cultivated fields (0–8 and 0–15 cm plowing, respectively). To change plowing depth was expected to make different contacting zone between root system and radiocesium in soil. The radioactivity values of the plants due to the radiocesium134Cs and137Cs were 22–179 and 29–225 Bq kg dry weight−1, respectively. The134Cs and137Cs transfer factors for plants grown in the shallow field ranged from 0.021 to 0.12 and fro 0.019 to 0.13, respectively, with the geometric means of 0.051 and 0.057, respectively. The134Cs and137Cs transfer factors for plants grown in the deep field ranged from 0.019 to 0.13 and from 0.022 to 0.13, respectively, with the geometric means of 0.045 and 0.063, respectively. Although a reducing ratio was calculated to evaluate the decrease in radiocesium from contaminated soil during cultivation (i.e., phytoremediation ability), no plant species resulted in a remarkable decrease in radiocesium in soil among the tested crops. These results should be followed up for several years and further analyses are required to evaluate whether the phytoremediation technique is applicable to radioactively contaminated farmlands.
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DOI：
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发表时间：
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期刊：
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DOI：
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期刊：
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