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首页> 外文期刊>Plant and Soil >Experimental investigation of plant uptake of caesium from soils amended with clinoptilolite and calcium carbonate.
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Experimental investigation of plant uptake of caesium from soils amended with clinoptilolite and calcium carbonate.

机译：斜发沸石和碳酸钙对土壤中铯吸收的实验研究。

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摘要

Radioactive caesium (137Cs), from the Chernobyl accident of 1986, has unexpectedly remained in a bioavailable form in upland, sheep-grazing soils of Great Britain. As a potential remedial measure, clinoptilolite was tested in a greenhouse pot experiment for its effectiveness in selectively taking up Cs from two British soils: a lowland loam (Denbigh 1 brown earth) and an upland peat (Crowdy 2 series). Lolium perenne cv. Arno plants grown on these 10% (by weight) clinoptilolite-treated soils containing up to 40 mg added Cs kg-1 soil had leaf tissue Cs concentrations <30 mg Cs kg-1 plant dry weight. Where no clinoptilolite had been added, Cs concentration in plant leaf tissue reached 1860 and 150 mg kg-1 on peat and loam, respectively. The additionof calcium carbonate (as ground limestone) to the Cs-treated, clinoptilolite-free peat soil increased the plant concentration of Cs approximately 5 times, but this effect was not observed with the loam soil. Compositions of clinoptilolite grains subsequently separated from the experimental soils ranged from 7.5 to 9.0 mg Cs kg-1 for the control soils (no added Cs), while soils treated with Cs gave Cs concentrations in clinoptilolite of 155-170 mg kg-1 (separated from loam) and 347-354 mg kg-1 (separatedfrom peat).
机译：源自1986年切尔诺贝利事故的放射性铯（137Cs）出乎意料地以生物可利用的形式保留在英国高地，绵羊放牧的土壤中。作为一种可能的补救措施，斜发沸石在温室盆栽试验中进行了测试，该方法可有效地选择性吸收两种英国土壤中的Cs：低地壤土（Denbigh 1棕壤）和高地泥炭（Crowdy 2系列）。黑麦草在这些含10％（重量）斜发沸石处理过的土壤中生长的Arno植物，其土壤中的Cs浓度小于30 mg Cs kg-1植物干重，其中土壤中添加的Cs kg-1高达40 mg。在未添加斜发沸石的情况下，泥炭和壤土上植物叶片组织中的Cs浓度分别达到1860和150 mg kg-1。在经Cs处理的无斜发沸石的泥炭土中添加碳酸钙（作为石灰石粉）可使植物的Cs浓度增加约5倍，但在壤土中未观察到这种效果。随后从实验土壤中分离出的斜发沸石颗粒的组成范围为对照土壤（不添加Cs）为7.5至9.0 mg Cs kg-1，而用Cs处理的土壤在斜发沸石中的Cs浓度为155-170 mg kg-1（分离（从壤土中）和347-354 mg kg-1（与泥炭分开）。

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