Migration Behavior of Eu(III) in Sandy Soil in the Presence of Dissolved Organic Materials
Migration Behavior of Eu(III) in Sandy Soil in the Presence of Dissolved Organic Materials
复制标题
溶解有机物存在下沙土中 Eu(III) 的迁移行为
DOI：
10.1524/ract.1998.82.special-issue.205
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发表时间：
1998
影响因子：
1.8
通讯作者：
J. L. Young
中科院分区：
文献类型：
--
作者：
S. Nagao;R. Rao;R. Killey;J. L. Young
采用恒定投加法，通过柱式实验研究了Eu(III)在含有DOM的沙土中的迁移行为。以从加拿大Chalk River地下水中提取的DOM、Aldrich公司的试剂腐植酸(HA)和国际腐植酸协会的Suwannee河HA和河黄腐酸(FA)为参照物，比较了它们对Eu(III)迁移的影响。在pH值为5.5、离子强度为0.01min的NaC_(104)存在下，将Eu溶液引入沙土填充柱(2.5cmI.D.×2.5 cm长)，恒定流速为1.0mL.Μ。在没有DOM的情况下，即使在90个孔体积从柱上洗脱后也没有检测到Eu。然而，当任何一个DOM存在时，都观察到了Eu的洗脱。Eu的最大相对浓度顺序为：河Fa<；地下水Dom<；河HA=Aldrich HA。这一序列表明，DOM特性的差异可能反映在Eu-DOM络合物在沙土中的移动性上。
Migration behavior of Eu(III) in sandy soil in the presence of dissolved organic material (DOM) was studied by the column experiments using a constant feed technique. A site specific DOM, isolated from the groundwater at Chalk River in Canada, a reagent humic acid (HA) from Aldrich Co. Ltd. and Suwannee River HA and River fulvic acid (FA) from the International Humic Substances Society, as reference materials, were used in this study for comparing their effects on the mobility of Eu(III). Solutions of Eu in the presence of the DOMs at pH 5.5 and ionic strength of 0.01 Μ NaC104 were introduced onto the column (2.5 cm I.D. X 2.5 cm long) packed with the sandy soil at a constant flow rate of 1.0 mL · min. In the absence of DOM, Eu was not detected even after 90 pore volumes were eluted from the column. Europium elution was observed, however, when any of the DOMs were present. Maximum relative concentrations of Eu were observed in the order: River FA < Groundwater DOM < River HA = Aldrich HA. This sequence suggests that differences in characteristics of DOM may be reflected in mobility of Eu-DOM complexes in sandy soil.